rnd-20070331-1-src
[rocksndiamonds.git] / src / game.c
index 7949da60c770145cb4d447fd1329c6b36e6a98b9..d580212fd8e725218ce9cb3cdc68ceff033ecbbc 100644 (file)
@@ -1,7 +1,7 @@
 /***********************************************************
 * Rocks'n'Diamonds -- McDuffin Strikes Back!               *
 *----------------------------------------------------------*
-* (c) 1995-2002 Artsoft Entertainment                      *
+* (c) 1995-2006 Artsoft Entertainment                      *
 *               Holger Schemel                             *
 *               Detmolder Strasse 189                      *
 *               33604 Bielefeld                            *
 #define USE_NEW_AMOEBA_CODE    FALSE
 
 /* EXPERIMENTAL STUFF */
-#define USE_NEW_STUFF                  (TRUE                           * 1)
+#define USE_NEW_STUFF                  (                         1)
 
-#define USE_NEW_MOVE_STYLE             (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_NEW_MOVE_DELAY             (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_NEW_PUSH_DELAY             (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_NEW_BLOCK_STYLE            (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_NEW_SP_SLIPPERY            (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_NEW_RANDOMIZE              (TRUE   * USE_NEW_STUFF         * 1)
+#define USE_NEW_SP_SLIPPERY            (USE_NEW_STUFF          * 1)
+#define USE_NEW_CUSTOM_VALUE           (USE_NEW_STUFF          * 1)
+#define USE_NEW_PLAYER_ANIM            (USE_NEW_STUFF          * 1)
+#define USE_NEW_ALL_SLIPPERY           (USE_NEW_STUFF          * 1)
+#define USE_NEW_PLAYER_SPEED           (USE_NEW_STUFF          * 1)
+#define USE_NEW_DELAYED_ACTION         (USE_NEW_STUFF          * 1)
+#define USE_NEW_SNAP_DELAY             (USE_NEW_STUFF          * 1)
+#define USE_ONLY_ONE_CHANGE_PER_FRAME  (USE_NEW_STUFF          * 1)
+#define USE_ONE_MORE_CHANGE_PER_FRAME  (USE_NEW_STUFF          * 1)
+#define USE_FIXED_DONT_RUN_INTO                (USE_NEW_STUFF          * 1)
+#define USE_NEW_SPRING_BUMPER          (USE_NEW_STUFF          * 1)
+#define USE_STOP_CHANGED_ELEMENTS      (USE_NEW_STUFF          * 1)
+#define USE_ELEMENT_TOUCHING_BUGFIX    (USE_NEW_STUFF          * 1)
+#define USE_NEW_CONTINUOUS_SNAPPING    (USE_NEW_STUFF          * 1)
+#define USE_GFX_RESET_GFX_ANIMATION    (USE_NEW_STUFF          * 1)
+#define USE_BOTH_SWITCHGATE_SWITCHES   (USE_NEW_STUFF          * 1)
+#define USE_PLAYER_GRAVITY             (USE_NEW_STUFF          * 1)
+#define USE_FIXED_BORDER_RUNNING_GFX   (USE_NEW_STUFF          * 1)
+#define USE_QUICKSAND_BD_ROCK_BUGFIX   (USE_NEW_STUFF          * 0)
 
-#define USE_CAN_MOVE_NOT_MOVING                (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_PREVIOUS_MOVE_DIR          (TRUE   * USE_NEW_STUFF         * 1)
+#define USE_QUICKSAND_IMPACT_BUGFIX    (USE_NEW_STUFF          * 0)
 
-#define USE_PUSH_BUGFIX                        (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_GRAVITY_BUGFIX_NEW         (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_GRAVITY_BUGFIX_OLD         (TRUE   * USE_NEW_STUFF         * 0)
+#define USE_CODE_THAT_BREAKS_SNAKE_BITE        (USE_NEW_STUFF          * 1)
 
-#define USE_PENGUIN_COLLECT_BUGFIX     (TRUE   * USE_NEW_STUFF         * 1)
+#define USE_UFAST_PLAYER_EXIT_BUGFIX   (USE_NEW_STUFF          * 1)
 
-#define USE_IMPACT_BUGFIX              (TRUE   * USE_NEW_STUFF         * 1)
+#define USE_GFX_RESET_ONLY_WHEN_MOVING (USE_NEW_STUFF          * 1)
+#define USE_GFX_RESET_PLAYER_ARTWORK   (USE_NEW_STUFF          * 1)
 
-#define USE_HITTING_SOMETHING_BUGFIX   (TRUE   * USE_NEW_STUFF         * 1)
-#define USE_HIT_BY_SOMETHING_BUGFIX    (TRUE   * USE_NEW_STUFF         * 1)
+#define USE_FIX_KILLED_BY_NON_WALKABLE (USE_NEW_STUFF          * 1)
+#define USE_FIX_IMPACT_COLLISION       (USE_NEW_STUFF          * 1)
 
-#define USE_DROP_BUGFIX                        (TRUE   * USE_NEW_STUFF         * 1)
-
-#define USE_CHANGE_TO_TRIGGERED                (TRUE   * USE_NEW_STUFF         * 1)
-
-#define USE_BACK_WALKABLE_BUGFIX       (TRUE   * USE_NEW_STUFF         * 1)
+#define USE_GFX_RESET_WHEN_NOT_MOVING  (USE_NEW_STUFF          * 1)
 
 
 /* for DigField() */
 #define DF_SNAP                        2
 
 /* for MovePlayer() */
-#define MF_NO_ACTION           0
-#define MF_MOVING              1
-#define MF_ACTION              2
+#define MP_NO_ACTION           0
+#define MP_MOVING              1
+#define MP_ACTION              2
+#define MP_DONT_RUN_INTO       (MP_MOVING | MP_ACTION)
 
 /* for ScrollPlayer() */
 #define SCROLL_INIT            0
 #define SCROLL_GO_ON           1
 
-/* for Explode() */
+/* for Bang()/Explode() */
 #define EX_PHASE_START         0
 #define EX_TYPE_NONE           0
 #define EX_TYPE_NORMAL         (1 << 0)
 #define EX_TYPE_CENTER         (1 << 1)
 #define EX_TYPE_BORDER         (1 << 2)
 #define EX_TYPE_CROSS          (1 << 3)
+#define EX_TYPE_DYNA           (1 << 4)
 #define EX_TYPE_SINGLE_TILE    (EX_TYPE_CENTER | EX_TYPE_BORDER)
 
+#define PANEL_OFF()            (local_player->LevelSolved_PanelOff)
+#define        PANEL_DEACTIVATED(p)    ((p)->x < 0 || (p)->y < 0 || PANEL_OFF())
+#define PANEL_XPOS(p)          (DX + ALIGNED_TEXT_XPOS(p))
+#define PANEL_YPOS(p)          (DY + ALIGNED_TEXT_YPOS(p))
+
 /* special positions in the game control window (relative to control window) */
-#define XX_LEVEL               37
-#define YY_LEVEL               20
-#define XX_EMERALDS            29
-#define YY_EMERALDS            54
-#define XX_DYNAMITE            29
-#define YY_DYNAMITE            89
-#define XX_KEYS                        18
-#define YY_KEYS                        123
-#define XX_SCORE               15
-#define YY_SCORE               159
-#define XX_TIME1               29
-#define XX_TIME2               30
-#define YY_TIME                        194
+#define XX_LEVEL1              (PANEL_XPOS(game.panel.level))
+#define XX_LEVEL2              (PANEL_XPOS(game.panel.level) - 1)
+#define XX_LEVEL               (PANEL_XPOS(game.panel.level))
+#define YY_LEVEL               (PANEL_YPOS(game.panel.level))
+#define XX_EMERALDS            (PANEL_XPOS(game.panel.gems))
+#define YY_EMERALDS            (PANEL_YPOS(game.panel.gems))
+#define XX_DYNAMITE            (PANEL_XPOS(game.panel.inventory))
+#define YY_DYNAMITE            (PANEL_YPOS(game.panel.inventory))
+#define XX_KEYS                        (PANEL_XPOS(game.panel.keys))
+#define YY_KEYS                        (PANEL_YPOS(game.panel.keys))
+#define XX_SCORE               (PANEL_XPOS(game.panel.score))
+#define YY_SCORE               (PANEL_YPOS(game.panel.score))
+#define XX_TIME1               (PANEL_XPOS(game.panel.time))
+#define XX_TIME2               (PANEL_XPOS(game.panel.time) + 1)
+#define XX_TIME                        (PANEL_XPOS(game.panel.time))
+#define YY_TIME                        (PANEL_YPOS(game.panel.time))
 
 /* special positions in the game control window (relative to main window) */
+#define DX_LEVEL1              (DX + XX_LEVEL1)
+#define DX_LEVEL2              (DX + XX_LEVEL2)
 #define DX_LEVEL               (DX + XX_LEVEL)
 #define DY_LEVEL               (DY + YY_LEVEL)
 #define DX_EMERALDS            (DX + XX_EMERALDS)
 #define DY_SCORE               (DY + YY_SCORE)
 #define DX_TIME1               (DX + XX_TIME1)
 #define DX_TIME2               (DX + XX_TIME2)
+#define DX_TIME                        (DX + XX_TIME)
 #define DY_TIME                        (DY + YY_TIME)
 
+#if 1
+/* game panel display and control definitions */
+
+#define GAME_CONTROL_LEVEL_NUMBER              0
+#define GAME_CONTROL_GEMS                      1
+#define GAME_CONTROL_INVENTORY                 2
+#define GAME_CONTROL_KEY_1                     3
+#define GAME_CONTROL_KEY_2                     4
+#define GAME_CONTROL_KEY_3                     5
+#define GAME_CONTROL_KEY_4                     6
+#define GAME_CONTROL_KEY_5                     7
+#define GAME_CONTROL_KEY_6                     8
+#define GAME_CONTROL_KEY_7                     9
+#define GAME_CONTROL_KEY_8                     10
+#define GAME_CONTROL_KEY_WHITE                 11
+#define GAME_CONTROL_KEY_WHITE_COUNT           12
+#define GAME_CONTROL_SCORE                     13
+#define GAME_CONTROL_TIME                      14
+#define GAME_CONTROL_TIME_HH                   15
+#define GAME_CONTROL_TIME_MM                   16
+#define GAME_CONTROL_TIME_SS                   17
+#define GAME_CONTROL_DROP_NEXT_1               18
+#define GAME_CONTROL_DROP_NEXT_2               19
+#define GAME_CONTROL_DROP_NEXT_3               20
+#define GAME_CONTROL_DROP_NEXT_4               21
+#define GAME_CONTROL_DROP_NEXT_5               22
+#define GAME_CONTROL_DROP_NEXT_6               23
+#define GAME_CONTROL_DROP_NEXT_7               24
+#define GAME_CONTROL_DROP_NEXT_8               25
+#define GAME_CONTROL_SHIELD_NORMAL             26
+#define GAME_CONTROL_SHIELD_NORMAL_TIME                27
+#define GAME_CONTROL_SHIELD_DEADLY             28
+#define GAME_CONTROL_SHIELD_DEADLY_TIME                29
+#define GAME_CONTROL_EXIT                      30
+#define GAME_CONTROL_EM_EXIT                   31
+#define GAME_CONTROL_SP_EXIT                   32
+#define GAME_CONTROL_STEEL_EXIT                        33
+#define GAME_CONTROL_EM_STEEL_EXIT             34
+#define GAME_CONTROL_EMC_MAGIC_BALL            35
+#define GAME_CONTROL_EMC_MAGIC_BALL_SWITCH     36
+#define GAME_CONTROL_LIGHT_SWITCH              37
+#define GAME_CONTROL_LIGHT_SWITCH_TIME         38
+#define GAME_CONTROL_TIMEGATE_SWITCH           39
+#define GAME_CONTROL_TIMEGATE_SWITCH_TIME      40
+#define GAME_CONTROL_SWITCHGATE_SWITCH         41
+#define GAME_CONTROL_EMC_LENSES                        42
+#define GAME_CONTROL_EMC_LENSES_TIME           43
+#define GAME_CONTROL_EMC_MAGNIFIER             44
+#define GAME_CONTROL_EMC_MAGNIFIER_TIME                45
+#define GAME_CONTROL_BALLOON_SWITCH            46
+#define GAME_CONTROL_DYNABOMB_NUMBER           47
+#define GAME_CONTROL_DYNABOMB_SIZE             48
+#define GAME_CONTROL_DYNABOMB_POWER            49
+#define GAME_CONTROL_PENGUINS                  50
+#define GAME_CONTROL_SOKOBAN_OBJECTS           51
+#define GAME_CONTROL_SOKOBAN_FIELDS            52
+#define GAME_CONTROL_ROBOT_WHEEL               53
+#define GAME_CONTROL_CONVEYOR_BELT_1           54
+#define GAME_CONTROL_CONVEYOR_BELT_1_SWITCH    55
+#define GAME_CONTROL_CONVEYOR_BELT_2           56
+#define GAME_CONTROL_CONVEYOR_BELT_2_SWITCH    57
+#define GAME_CONTROL_CONVEYOR_BELT_3           58
+#define GAME_CONTROL_CONVEYOR_BELT_3_SWITCH    59
+#define GAME_CONTROL_CONVEYOR_BELT_4           60
+#define GAME_CONTROL_CONVEYOR_BELT_4_SWITCH    61
+#define GAME_CONTROL_MAGIC_WALL                        62
+#define GAME_CONTROL_MAGIC_WALL_TIME           63
+#define GAME_CONTROL_BD_MAGIC_WALL             64
+#define GAME_CONTROL_DC_MAGIC_WALL             65
+#define GAME_CONTROL_PLAYER_NAME               66
+#define GAME_CONTROL_LEVEL_NAME                        67
+#define GAME_CONTROL_LEVEL_AUTHOR              68
+
+#define NUM_GAME_CONTROLS                      69
+
+int game_control_value[NUM_GAME_CONTROLS];
+int last_game_control_value[NUM_GAME_CONTROLS];
+
+struct GameControlInfo
+{
+  int nr;
+
+  struct TextPosInfo *pos;
+  int type;
+};
+
+static struct GameControlInfo game_controls[] =
+{
+  {
+    GAME_CONTROL_LEVEL_NUMBER,
+    &game.panel.level_number,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_GEMS,
+    &game.panel.gems,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_INVENTORY,
+    &game.panel.inventory,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_KEY_1,
+    &game.panel.key[0],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_2,
+    &game.panel.key[1],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_3,
+    &game.panel.key[2],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_4,
+    &game.panel.key[3],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_5,
+    &game.panel.key[4],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_6,
+    &game.panel.key[5],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_7,
+    &game.panel.key[6],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_8,
+    &game.panel.key[7],
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_WHITE,
+    &game.panel.key_white,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_KEY_WHITE_COUNT,
+    &game.panel.key_white_count,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_SCORE,
+    &game.panel.score,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_TIME,
+    &game.panel.time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_TIME_HH,
+    &game.panel.time_hh,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_TIME_MM,
+    &game.panel.time_mm,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_TIME_SS,
+    &game.panel.time_ss,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_1,
+    &game.panel.drop_next_1,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_2,
+    &game.panel.drop_next_2,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_3,
+    &game.panel.drop_next_3,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_4,
+    &game.panel.drop_next_4,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_5,
+    &game.panel.drop_next_5,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_6,
+    &game.panel.drop_next_6,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_7,
+    &game.panel.drop_next_7,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DROP_NEXT_8,
+    &game.panel.drop_next_8,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_SHIELD_NORMAL,
+    &game.panel.shield_normal,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_SHIELD_NORMAL_TIME,
+    &game.panel.shield_normal_time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_SHIELD_DEADLY,
+    &game.panel.shield_deadly,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_SHIELD_DEADLY_TIME,
+    &game.panel.shield_deadly_time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_EXIT,
+    &game.panel.exit,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_EM_EXIT,
+    &game.panel.em_exit,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_SP_EXIT,
+    &game.panel.sp_exit,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_STEEL_EXIT,
+    &game.panel.steel_exit,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_EM_STEEL_EXIT,
+    &game.panel.em_steel_exit,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_EMC_MAGIC_BALL,
+    &game.panel.emc_magic_ball,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_EMC_MAGIC_BALL_SWITCH,
+    &game.panel.emc_magic_ball_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_LIGHT_SWITCH,
+    &game.panel.light_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_LIGHT_SWITCH_TIME,
+    &game.panel.light_switch_time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_TIMEGATE_SWITCH,
+    &game.panel.timegate_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_TIMEGATE_SWITCH_TIME,
+    &game.panel.timegate_switch_time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_SWITCHGATE_SWITCH,
+    &game.panel.switchgate_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_EMC_LENSES,
+    &game.panel.emc_lenses,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_EMC_LENSES_TIME,
+    &game.panel.emc_lenses_time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_EMC_MAGNIFIER,
+    &game.panel.emc_magnifier,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_EMC_MAGNIFIER_TIME,
+    &game.panel.emc_magnifier_time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_BALLOON_SWITCH,
+    &game.panel.balloon_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DYNABOMB_NUMBER,
+    &game.panel.dynabomb_number,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_DYNABOMB_SIZE,
+    &game.panel.dynabomb_size,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_DYNABOMB_POWER,
+    &game.panel.dynabomb_power,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_PENGUINS,
+    &game.panel.penguins,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_SOKOBAN_OBJECTS,
+    &game.panel.sokoban_objects,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_SOKOBAN_FIELDS,
+    &game.panel.sokoban_fields,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_ROBOT_WHEEL,
+    &game.panel.robot_wheel,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_1,
+    &game.panel.conveyor_belt_1,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_1_SWITCH,
+    &game.panel.conveyor_belt_1_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_2,
+    &game.panel.conveyor_belt_2,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_2_SWITCH,
+    &game.panel.conveyor_belt_2_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_3,
+    &game.panel.conveyor_belt_3,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_3_SWITCH,
+    &game.panel.conveyor_belt_3_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_4,
+    &game.panel.conveyor_belt_4,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_CONVEYOR_BELT_4_SWITCH,
+    &game.panel.conveyor_belt_4_switch,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_MAGIC_WALL,
+    &game.panel.magic_wall,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_MAGIC_WALL_TIME,
+    &game.panel.magic_wall_time,
+    TYPE_INTEGER,
+  },
+  {
+    GAME_CONTROL_BD_MAGIC_WALL,
+    &game.panel.bd_magic_wall,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_DC_MAGIC_WALL,
+    &game.panel.dc_magic_wall,
+    TYPE_ELEMENT,
+  },
+  {
+    GAME_CONTROL_PLAYER_NAME,
+    &game.panel.player_name,
+    TYPE_STRING,
+  },
+  {
+    GAME_CONTROL_LEVEL_NAME,
+    &game.panel.level_name,
+    TYPE_STRING,
+  },
+  {
+    GAME_CONTROL_LEVEL_AUTHOR,
+    &game.panel.level_author,
+    TYPE_STRING,
+  },
+
+  {
+    -1,
+    NULL,
+    -1,
+  }
+};
+#endif
+
+
+/* values for delayed check of falling and moving elements and for collision */
+#define CHECK_DELAY_MOVING     3
+#define CHECK_DELAY_FALLING    CHECK_DELAY_MOVING
+#define CHECK_DELAY_COLLISION  2
+#define CHECK_DELAY_IMPACT     CHECK_DELAY_COLLISION
+
 /* values for initial player move delay (initial delay counter value) */
 #define INITIAL_MOVE_DELAY_OFF -1
 #define INITIAL_MOVE_DELAY_ON  0
 
 /* values for player movement speed (which is in fact a delay value) */
+#define MOVE_DELAY_MIN_SPEED   32
 #define MOVE_DELAY_NORMAL_SPEED        8
 #define MOVE_DELAY_HIGH_SPEED  4
+#define MOVE_DELAY_MAX_SPEED   1
 
-#define DOUBLE_MOVE_DELAY(x)   (x = (x <= MOVE_DELAY_HIGH_SPEED ? x * 2 : x))
-#define HALVE_MOVE_DELAY(x)    (x = (x >= MOVE_DELAY_HIGH_SPEED ? x / 2 : x))
-#define DOUBLE_PLAYER_SPEED(p) (HALVE_MOVE_DELAY((p)->move_delay_value))
+#define DOUBLE_MOVE_DELAY(x)   (x = (x < MOVE_DELAY_MIN_SPEED ? x * 2 : x))
+#define HALVE_MOVE_DELAY(x)    (x = (x > MOVE_DELAY_MAX_SPEED ? x / 2 : x))
+
+#define DOUBLE_PLAYER_SPEED(p) (HALVE_MOVE_DELAY( (p)->move_delay_value))
 #define HALVE_PLAYER_SPEED(p)  (DOUBLE_MOVE_DELAY((p)->move_delay_value))
 
 /* values for other actions */
 #define MOVE_STEPSIZE_NORMAL   (TILEX / MOVE_DELAY_NORMAL_SPEED)
+#define MOVE_STEPSIZE_MIN      (1)
+#define MOVE_STEPSIZE_MAX      (TILEX)
 
 #define GET_DX_FROM_DIR(d)     ((d) == MV_LEFT ? -1 : (d) == MV_RIGHT ? 1 : 0)
 #define GET_DY_FROM_DIR(d)     ((d) == MV_UP   ? -1 : (d) == MV_DOWN  ? 1 : 0)
 
-#define        INIT_GFX_RANDOM()       (SimpleRND(1000000))
+#define        INIT_GFX_RANDOM()       (GetSimpleRandom(1000000))
 
 #define GET_NEW_PUSH_DELAY(e)  (   (element_info[e].push_delay_fixed) + \
                                 RND(element_info[e].push_delay_random))
                                 RND(element_info[e].move_delay_random))
 #define GET_MAX_MOVE_DELAY(e)  (   (element_info[e].move_delay_fixed) + \
                                    (element_info[e].move_delay_random))
+#define GET_NEW_CE_VALUE(e)    (   (element_info[e].ce_value_fixed_initial) +\
+                                RND(element_info[e].ce_value_random_initial))
+#define GET_CE_SCORE(e)                (   (element_info[e].collect_score))
 #define GET_CHANGE_DELAY(c)    (   ((c)->delay_fixed  * (c)->delay_frames) + \
                                 RND((c)->delay_random * (c)->delay_frames))
+#define GET_CE_DELAY_VALUE(c)  (   ((c)->delay_fixed) + \
+                                RND((c)->delay_random))
+
 
-#define GET_TARGET_ELEMENT(e, ch)                                      \
-       ((e) == EL_TRIGGER_ELEMENT ? (ch)->actual_trigger_element :     \
-        (e) == EL_TRIGGER_PLAYER  ? (ch)->actual_trigger_player : (e))
+#define GET_VALID_RUNTIME_ELEMENT(e)                                   \
+        ((e) >= NUM_RUNTIME_ELEMENTS ? EL_UNKNOWN : (e))
 
-#define GET_VALID_PLAYER_ELEMENT(e)                                    \
-       ((e) >= EL_PLAYER_1 && (e) <= EL_PLAYER_4 ? (e) : EL_PLAYER_1)
+#define RESOLVED_REFERENCE_ELEMENT(be, e)                              \
+       ((be) + (e) - EL_SELF < EL_CUSTOM_START ? EL_CUSTOM_START :     \
+        (be) + (e) - EL_SELF > EL_CUSTOM_END   ? EL_CUSTOM_END :       \
+        (be) + (e) - EL_SELF)
+
+#define GET_TARGET_ELEMENT(be, e, ch, cv, cs)                          \
+       ((e) == EL_TRIGGER_PLAYER   ? (ch)->actual_trigger_player    :  \
+        (e) == EL_TRIGGER_ELEMENT  ? (ch)->actual_trigger_element   :  \
+        (e) == EL_TRIGGER_CE_VALUE ? (ch)->actual_trigger_ce_value  :  \
+        (e) == EL_TRIGGER_CE_SCORE ? (ch)->actual_trigger_ce_score  :  \
+        (e) == EL_CURRENT_CE_VALUE ? (cv) :                            \
+        (e) == EL_CURRENT_CE_SCORE ? (cs) :                            \
+        (e) >= EL_PREV_CE_8 && (e) <= EL_NEXT_CE_8 ?                   \
+        RESOLVED_REFERENCE_ELEMENT(be, e) :                            \
+        (e))
 
 #define CAN_GROW_INTO(e)                                               \
        ((e) == EL_SAND || (IS_DIGGABLE(e) && level.grow_into_diggable))
 #define SATELLITE_CAN_ENTER_FIELD(x, y)                                        \
        ELEMENT_CAN_ENTER_FIELD_BASE_2(EL_SATELLITE, x, y, 0)
 
+#define ANDROID_CAN_ENTER_FIELD(e, x, y)                               \
+       ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, Feld[x][y] == EL_EMC_PLANT)
+
+#define ANDROID_CAN_CLONE_FIELD(x, y)                                  \
+       (IN_LEV_FIELD(x, y) && (CAN_BE_CLONED_BY_ANDROID(Feld[x][y]) || \
+                               CAN_BE_CLONED_BY_ANDROID(EL_TRIGGER_ELEMENT)))
+
 #define ENEMY_CAN_ENTER_FIELD(e, x, y)                                 \
        ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, 0)
 
        ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, IS_FOOD_PIG(Feld[x][y]))
 
 #define PENGUIN_CAN_ENTER_FIELD(e, x, y)                               \
-       ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, (Feld[x][y] == EL_EXIT_OPEN ||\
+       ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, (Feld[x][y] == EL_EXIT_OPEN || \
+                                                Feld[x][y] == EL_EM_EXIT_OPEN || \
+                                                Feld[x][y] == EL_STEEL_EXIT_OPEN || \
+                                                Feld[x][y] == EL_EM_STEEL_EXIT_OPEN || \
                                                 IS_FOOD_PENGUIN(Feld[x][y])))
 #define DRAGON_CAN_ENTER_FIELD(e, x, y)                                        \
        ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, 0)
 #define SPRING_CAN_ENTER_FIELD(e, x, y)                                        \
        ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, 0)
 
-#define GROUP_NR(e)            ((e) - EL_GROUP_START)
-#define MOVE_ENTER_EL(e)       (element_info[e].move_enter_element)
-#define IS_IN_GROUP(e, nr)     (element_info[e].in_group[nr] == TRUE)
-#define IS_IN_GROUP_EL(e, ge)  (IS_IN_GROUP(e, (ge) - EL_GROUP_START))
+#define SPRING_CAN_BUMP_FROM_FIELD(x, y)                               \
+       (IN_LEV_FIELD(x, y) && (Feld[x][y] == EL_EMC_SPRING_BUMPER ||   \
+                               Feld[x][y] == EL_EMC_SPRING_BUMPER_ACTIVE))
 
-#define IS_EQUAL_OR_IN_GROUP(e, ge)                                    \
-       (IS_GROUP_ELEMENT(ge) ? IS_IN_GROUP(e, GROUP_NR(ge)) : (e) == (ge))
+#define MOVE_ENTER_EL(e)       (element_info[e].move_enter_element)
 
 #define CE_ENTER_FIELD_COND(e, x, y)                                   \
                (!IS_PLAYER(x, y) &&                                    \
 
 /* forward declaration for internal use */
 
+static void CreateField(int, int, int);
+
+static void SetPlayerWaiting(struct PlayerInfo *, boolean);
 static void AdvanceFrameAndPlayerCounters(int);
 
 static boolean MovePlayerOneStep(struct PlayerInfo *, int, int, int, int);
@@ -257,8 +760,8 @@ static void InitBeltMovement(void);
 static void CloseAllOpenTimegates(void);
 static void CheckGravityMovement(struct PlayerInfo *);
 static void CheckGravityMovementWhenNotMoving(struct PlayerInfo *);
-static void KillHeroUnlessEnemyProtected(int, int);
-static void KillHeroUnlessExplosionProtected(int, int);
+static void KillPlayerUnlessEnemyProtected(int, int);
+static void KillPlayerUnlessExplosionProtected(int, int);
 
 static void TestIfPlayerTouchesCustomElement(int, int);
 static void TestIfElementTouchesCustomElement(int, int);
@@ -267,29 +770,27 @@ static void TestIfElementHitsCustomElement(int, int, int);
 static void TestIfElementSmashesCustomElement(int, int, int);
 #endif
 
-static void ChangeElement(int, int, int);
+static void HandleElementChange(int, int, int);
+static void ExecuteCustomElementAction(int, int, int, int);
+static boolean ChangeElement(int, int, int, int);
 
 static boolean CheckTriggeredElementChangeExt(int, int, int, int, int,int,int);
 #define CheckTriggeredElementChange(x, y, e, ev)                       \
-       CheckTriggeredElementChangeExt(x, y, e, ev, CH_PLAYER_ANY,      \
-                                      CH_SIDE_ANY, -1)
+       CheckTriggeredElementChangeExt(x,y,e,ev, CH_PLAYER_ANY,CH_SIDE_ANY, -1)
 #define CheckTriggeredElementChangeByPlayer(x, y, e, ev, p, s)         \
        CheckTriggeredElementChangeExt(x, y, e, ev, p, s, -1)
 #define CheckTriggeredElementChangeBySide(x, y, e, ev, s)              \
        CheckTriggeredElementChangeExt(x, y, e, ev, CH_PLAYER_ANY, s, -1)
 #define CheckTriggeredElementChangeByPage(x, y, e, ev, p)              \
-       CheckTriggeredElementChangeExt(x, y, e, ev, CH_PLAYER_ANY,      \
-                                      CH_SIDE_ANY, p)
+       CheckTriggeredElementChangeExt(x,y,e,ev, CH_PLAYER_ANY, CH_SIDE_ANY, p)
 
-static boolean CheckElementChangeExt(int, int, int, int, int, int, int, int);
+static boolean CheckElementChangeExt(int, int, int, int, int, int, int);
 #define CheckElementChange(x, y, e, te, ev)                            \
-       CheckElementChangeExt(x, y, e, te, ev, CH_PLAYER_ANY, CH_SIDE_ANY, -1)
+       CheckElementChangeExt(x, y, e, te, ev, CH_PLAYER_ANY, CH_SIDE_ANY)
 #define CheckElementChangeByPlayer(x, y, e, ev, p, s)                  \
-       CheckElementChangeExt(x, y, e, EL_EMPTY, ev, p, s, -1)
+       CheckElementChangeExt(x, y, e, EL_EMPTY, ev, p, s)
 #define CheckElementChangeBySide(x, y, e, te, ev, s)                   \
-       CheckElementChangeExt(x, y, e, te, ev, CH_PLAYER_ANY, s, -1)
-#define CheckElementChangeByPage(x, y, e, te, ev, p)                   \
-       CheckElementChangeExt(x, y, e, te, ev, CH_PLAYER_ANY, CH_SIDE_ANY, p)
+       CheckElementChangeExt(x, y, e, te, ev, CH_PLAYER_ANY, s)
 
 static void PlayLevelSound(int, int, int);
 static void PlayLevelSoundNearest(int, int, int);
@@ -303,8 +804,63 @@ static void PlayLevelMusic();
 static void MapGameButtons();
 static void HandleGameButtons(struct GadgetInfo *);
 
+int AmoebeNachbarNr(int, int);
+void AmoebeUmwandeln(int, int);
+void ContinueMoving(int, int);
+void Bang(int, int);
+void InitMovDir(int, int);
+void InitAmoebaNr(int, int);
+int NewHiScore(void);
+
+void TestIfGoodThingHitsBadThing(int, int, int);
+void TestIfBadThingHitsGoodThing(int, int, int);
+void TestIfPlayerTouchesBadThing(int, int);
+void TestIfPlayerRunsIntoBadThing(int, int, int);
+void TestIfBadThingTouchesPlayer(int, int);
+void TestIfBadThingRunsIntoPlayer(int, int, int);
+void TestIfFriendTouchesBadThing(int, int);
+void TestIfBadThingTouchesFriend(int, int);
+void TestIfBadThingTouchesOtherBadThing(int, int);
+
+void KillPlayer(struct PlayerInfo *);
+void BuryPlayer(struct PlayerInfo *);
+void RemovePlayer(struct PlayerInfo *);
+
+boolean SnapField(struct PlayerInfo *, int, int);
+boolean DropElement(struct PlayerInfo *);
+
+static int getInvisibleActiveFromInvisibleElement(int);
+static int getInvisibleFromInvisibleActiveElement(int);
+
 static struct GadgetInfo *game_gadget[NUM_GAME_BUTTONS];
 
+/* for detection of endless loops, caused by custom element programming */
+/* (using maximal playfield width x 10 is just a rough approximation) */
+#define MAX_ELEMENT_CHANGE_RECURSION_DEPTH     (MAX_PLAYFIELD_WIDTH * 10)
+
+#define RECURSION_LOOP_DETECTION_START(e, rc)                          \
+{                                                                      \
+  if (recursion_loop_detected)                                         \
+    return (rc);                                                       \
+                                                                       \
+  if (recursion_loop_depth > MAX_ELEMENT_CHANGE_RECURSION_DEPTH)       \
+  {                                                                    \
+    recursion_loop_detected = TRUE;                                    \
+    recursion_loop_element = (e);                                      \
+  }                                                                    \
+                                                                       \
+  recursion_loop_depth++;                                              \
+}
+
+#define RECURSION_LOOP_DETECTION_END()                                 \
+{                                                                      \
+  recursion_loop_depth--;                                              \
+}
+
+static int recursion_loop_depth;
+static boolean recursion_loop_detected;
+static boolean recursion_loop_element;
+
 
 /* ------------------------------------------------------------------------- */
 /* definition of elements that automatically change to other elements after  */
@@ -312,19 +868,22 @@ static struct GadgetInfo *game_gadget[NUM_GAME_BUTTONS];
 /* ------------------------------------------------------------------------- */
 
 /* forward declaration for changer functions */
-static void InitBuggyBase(int x, int y);
-static void WarnBuggyBase(int x, int y);
+static void InitBuggyBase(int, int);
+static void WarnBuggyBase(int, int);
+
+static void InitTrap(int, int);
+static void ActivateTrap(int, int);
+static void ChangeActiveTrap(int, int);
 
-static void InitTrap(int x, int y);
-static void ActivateTrap(int x, int y);
-static void ChangeActiveTrap(int x, int y);
+static void InitRobotWheel(int, int);
+static void RunRobotWheel(int, int);
+static void StopRobotWheel(int, int);
 
-static void InitRobotWheel(int x, int y);
-static void RunRobotWheel(int x, int y);
-static void StopRobotWheel(int x, int y);
+static void InitTimegateWheel(int, int);
+static void RunTimegateWheel(int, int);
 
-static void InitTimegateWheel(int x, int y);
-static void RunTimegateWheel(int x, int y);
+static void InitMagicBallDelay(int, int);
+static void ActivateMagicBall(int, int);
 
 struct ChangingElementInfo
 {
@@ -370,6 +929,62 @@ static struct ChangingElementInfo change_delay_list[] =
     NULL,
     NULL
   },
+  {
+    EL_STEEL_EXIT_OPENING,
+    EL_STEEL_EXIT_OPEN,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_STEEL_EXIT_CLOSING,
+    EL_STEEL_EXIT_CLOSED,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_EM_EXIT_OPENING,
+    EL_EM_EXIT_OPEN,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_EM_EXIT_CLOSING,
+#if 1
+    EL_EMPTY,
+#else
+    EL_EM_EXIT_CLOSED,
+#endif
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_EM_STEEL_EXIT_OPENING,
+    EL_EM_STEEL_EXIT_OPEN,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_EM_STEEL_EXIT_CLOSING,
+#if 1
+    EL_STEELWALL,
+#else
+    EL_EM_STEEL_EXIT_CLOSED,
+#endif
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
   {
     EL_SP_EXIT_OPENING,
     EL_SP_EXIT_OPEN,
@@ -491,6 +1106,46 @@ static struct ChangingElementInfo change_delay_list[] =
     RunTimegateWheel,
     NULL
   },
+  {
+    EL_DC_TIMEGATE_SWITCH_ACTIVE,
+    EL_DC_TIMEGATE_SWITCH,
+    0,
+    InitTimegateWheel,
+    RunTimegateWheel,
+    NULL
+  },
+  {
+    EL_EMC_MAGIC_BALL_ACTIVE,
+    EL_EMC_MAGIC_BALL_ACTIVE,
+    0,
+    InitMagicBallDelay,
+    NULL,
+    ActivateMagicBall
+  },
+  {
+    EL_EMC_SPRING_BUMPER_ACTIVE,
+    EL_EMC_SPRING_BUMPER,
+    8,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_DIAGONAL_SHRINKING,
+    EL_UNDEFINED,
+    0,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_DIAGONAL_GROWING,
+    EL_UNDEFINED,
+    0,
+    NULL,
+    NULL,
+    NULL,
+  },
 
   {
     EL_UNDEFINED,
@@ -531,10 +1186,14 @@ move_stepsize_list[] =
   { EL_AMOEBA_DROPPING,                2 },
   { EL_QUICKSAND_FILLING,      1 },
   { EL_QUICKSAND_EMPTYING,     1 },
+  { EL_QUICKSAND_FAST_FILLING, 2 },
+  { EL_QUICKSAND_FAST_EMPTYING,        2 },
   { EL_MAGIC_WALL_FILLING,     2 },
-  { EL_BD_MAGIC_WALL_FILLING,  2 },
   { EL_MAGIC_WALL_EMPTYING,    2 },
+  { EL_BD_MAGIC_WALL_FILLING,  2 },
   { EL_BD_MAGIC_WALL_EMPTYING, 2 },
+  { EL_DC_MAGIC_WALL_FILLING,  2 },
+  { EL_DC_MAGIC_WALL_EMPTYING, 2 },
 
   { EL_UNDEFINED,              0 },
 };
@@ -598,7 +1257,7 @@ access_direction_list[] =
   { EL_SP_GRAVITY_OFF_PORT_UP,                                      MV_DOWN },
   { EL_SP_GRAVITY_OFF_PORT_DOWN,                            MV_UP           },
 
-  { EL_UNDEFINED,                      MV_NO_MOVING                         }
+  { EL_UNDEFINED,                      MV_NONE                              }
 };
 
 static boolean trigger_events[MAX_NUM_ELEMENTS][NUM_CHANGE_EVENTS];
@@ -610,76 +1269,140 @@ static boolean trigger_events[MAX_NUM_ELEMENTS][NUM_CHANGE_EVENTS];
 
 #define CE_PAGE(e, ce)         (element_info[e].event_page[ce])
 
+/* static variables for playfield scan mode (scanning forward or backward) */
+static int playfield_scan_start_x = 0;
+static int playfield_scan_start_y = 0;
+static int playfield_scan_delta_x = 1;
+static int playfield_scan_delta_y = 1;
 
-void GetPlayerConfig()
-{
-  if (!audio.sound_available)
-    setup.sound_simple = FALSE;
+#define SCAN_PLAYFIELD(x, y)   for ((y) = playfield_scan_start_y;      \
+                                    (y) >= 0 && (y) <= lev_fieldy - 1; \
+                                    (y) += playfield_scan_delta_y)     \
+                               for ((x) = playfield_scan_start_x;      \
+                                    (x) >= 0 && (x) <= lev_fieldx - 1; \
+                                    (x) += playfield_scan_delta_x)
 
-  if (!audio.loops_available)
-    setup.sound_loops = FALSE;
+#ifdef DEBUG
+void DEBUG_SetMaximumDynamite()
+{
+  int i;
 
-  if (!audio.music_available)
-    setup.sound_music = FALSE;
+  for (i = 0; i < MAX_INVENTORY_SIZE; i++)
+    if (local_player->inventory_size < MAX_INVENTORY_SIZE)
+      local_player->inventory_element[local_player->inventory_size++] =
+       EL_DYNAMITE;
+}
+#endif
 
-  if (!video.fullscreen_available)
-    setup.fullscreen = FALSE;
+static void InitPlayfieldScanModeVars()
+{
+  if (game.use_reverse_scan_direction)
+  {
+    playfield_scan_start_x = lev_fieldx - 1;
+    playfield_scan_start_y = lev_fieldy - 1;
 
-  setup.sound = (setup.sound_simple || setup.sound_loops || setup.sound_music);
+    playfield_scan_delta_x = -1;
+    playfield_scan_delta_y = -1;
+  }
+  else
+  {
+    playfield_scan_start_x = 0;
+    playfield_scan_start_y = 0;
 
-  SetAudioMode(setup.sound);
-  InitJoysticks();
+    playfield_scan_delta_x = 1;
+    playfield_scan_delta_y = 1;
+  }
 }
 
-static int getBeltNrFromBeltElement(int element)
+static void InitPlayfieldScanMode(int mode)
 {
-  return (element < EL_CONVEYOR_BELT_2_LEFT ? 0 :
-         element < EL_CONVEYOR_BELT_3_LEFT ? 1 :
-         element < EL_CONVEYOR_BELT_4_LEFT ? 2 : 3);
+  game.use_reverse_scan_direction =
+    (mode == CA_ARG_SCAN_MODE_REVERSE ? TRUE : FALSE);
+
+  InitPlayfieldScanModeVars();
 }
 
-static int getBeltNrFromBeltActiveElement(int element)
+static int get_move_delay_from_stepsize(int move_stepsize)
 {
-  return (element < EL_CONVEYOR_BELT_2_LEFT_ACTIVE ? 0 :
-         element < EL_CONVEYOR_BELT_3_LEFT_ACTIVE ? 1 :
-         element < EL_CONVEYOR_BELT_4_LEFT_ACTIVE ? 2 : 3);
+  move_stepsize =
+    MIN(MAX(MOVE_STEPSIZE_MIN, move_stepsize), MOVE_STEPSIZE_MAX);
+
+  /* make sure that stepsize value is always a power of 2 */
+  move_stepsize = (1 << log_2(move_stepsize));
+
+  return TILEX / move_stepsize;
 }
 
-static int getBeltNrFromBeltSwitchElement(int element)
+static void SetPlayerMoveSpeed(struct PlayerInfo *player, int move_stepsize,
+                              boolean init_game)
 {
-  return (element < EL_CONVEYOR_BELT_2_SWITCH_LEFT ? 0 :
-         element < EL_CONVEYOR_BELT_3_SWITCH_LEFT ? 1 :
-         element < EL_CONVEYOR_BELT_4_SWITCH_LEFT ? 2 : 3);
+  int player_nr = player->index_nr;
+  int move_delay = get_move_delay_from_stepsize(move_stepsize);
+  boolean cannot_move = (move_stepsize == STEPSIZE_NOT_MOVING ? TRUE : FALSE);
+
+  /* do no immediately change move delay -- the player might just be moving */
+  player->move_delay_value_next = move_delay;
+
+  /* information if player can move must be set separately */
+  player->cannot_move = cannot_move;
+
+  if (init_game)
+  {
+    player->move_delay       = game.initial_move_delay[player_nr];
+    player->move_delay_value = game.initial_move_delay_value[player_nr];
+
+    player->move_delay_value_next = -1;
+
+    player->move_delay_reset_counter = 0;
+  }
 }
 
-static int getBeltDirNrFromBeltSwitchElement(int element)
+void GetPlayerConfig()
 {
-  static int belt_base_element[4] =
-  {
-    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
-    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
-    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
-    EL_CONVEYOR_BELT_4_SWITCH_LEFT
-  };
+  GameFrameDelay = setup.game_frame_delay;
 
-  int belt_nr = getBeltNrFromBeltSwitchElement(element);
-  int belt_dir_nr = element - belt_base_element[belt_nr];
+  if (!audio.sound_available)
+    setup.sound_simple = FALSE;
+
+  if (!audio.loops_available)
+    setup.sound_loops = FALSE;
+
+  if (!audio.music_available)
+    setup.sound_music = FALSE;
+
+  if (!video.fullscreen_available)
+    setup.fullscreen = FALSE;
+
+  setup.sound = (setup.sound_simple || setup.sound_loops || setup.sound_music);
 
-  return (belt_dir_nr % 3);
+  SetAudioMode(setup.sound);
+  InitJoysticks();
 }
 
-static int getBeltDirFromBeltSwitchElement(int element)
+int GetElementFromGroupElement(int element)
 {
-  static int belt_move_dir[3] =
+  if (IS_GROUP_ELEMENT(element))
   {
-    MV_LEFT,
-    MV_NO_MOVING,
-    MV_RIGHT
-  };
+    struct ElementGroupInfo *group = element_info[element].group;
+    int last_anim_random_frame = gfx.anim_random_frame;
+    int element_pos;
+
+    if (group->choice_mode == ANIM_RANDOM)
+      gfx.anim_random_frame = RND(group->num_elements_resolved);
+
+    element_pos = getAnimationFrame(group->num_elements_resolved, 1,
+                                   group->choice_mode, 0,
+                                   group->choice_pos);
+
+    if (group->choice_mode == ANIM_RANDOM)
+      gfx.anim_random_frame = last_anim_random_frame;
 
-  int belt_dir_nr = getBeltDirNrFromBeltSwitchElement(element);
+    group->choice_pos++;
 
-  return belt_move_dir[belt_dir_nr];
+    element = group->element_resolved[element_pos];
+  }
+
+  return element;
 }
 
 static void InitPlayerField(int x, int y, int element, boolean init_game)
@@ -696,7 +1419,10 @@ static void InitPlayerField(int x, int y, int element, boolean init_game)
       }
       else
       {
-       stored_player[0].use_murphy_graphic = TRUE;
+       stored_player[0].use_murphy = TRUE;
+
+       if (!level.use_artwork_element[0])
+         stored_player[0].artwork_element = EL_SP_MURPHY;
       }
 
       Feld[x][y] = EL_PLAYER_1;
@@ -714,7 +1440,6 @@ static void InitPlayerField(int x, int y, int element, boolean init_game)
                                level.sp_block_last_field :
                                level.block_last_field);
 
-#if USE_NEW_BLOCK_STYLE
     /* ---------- initialize player's last field block delay --------------- */
 
     /* always start with reliable default value (no adjustment needed) */
@@ -727,7 +1452,6 @@ static void InitPlayerField(int x, int y, int element, boolean init_game)
     /* special case 2: in game engines before 3.1.1, blocking was different */
     if (game.use_block_last_field_bug)
       player->block_delay_adjustment = (player->block_last_field ? -1 : 1);
-#endif
 
     if (!options.network || player->connected)
     {
@@ -794,41 +1518,45 @@ static void InitField(int x, int y, boolean init_game)
        Feld[x][y] = EL_ACID_POOL_BOTTOMRIGHT;
       break;
 
+    case EL_BUG:
     case EL_BUG_RIGHT:
     case EL_BUG_UP:
     case EL_BUG_LEFT:
     case EL_BUG_DOWN:
-    case EL_BUG:
+    case EL_SPACESHIP:
     case EL_SPACESHIP_RIGHT:
     case EL_SPACESHIP_UP:
     case EL_SPACESHIP_LEFT:
     case EL_SPACESHIP_DOWN:
-    case EL_SPACESHIP:
+    case EL_BD_BUTTERFLY:
     case EL_BD_BUTTERFLY_RIGHT:
     case EL_BD_BUTTERFLY_UP:
     case EL_BD_BUTTERFLY_LEFT:
     case EL_BD_BUTTERFLY_DOWN:
-    case EL_BD_BUTTERFLY:
+    case EL_BD_FIREFLY:
     case EL_BD_FIREFLY_RIGHT:
     case EL_BD_FIREFLY_UP:
     case EL_BD_FIREFLY_LEFT:
     case EL_BD_FIREFLY_DOWN:
-    case EL_BD_FIREFLY:
     case EL_PACMAN_RIGHT:
     case EL_PACMAN_UP:
     case EL_PACMAN_LEFT:
     case EL_PACMAN_DOWN:
     case EL_YAMYAM:
+    case EL_YAMYAM_LEFT:
+    case EL_YAMYAM_RIGHT:
+    case EL_YAMYAM_UP:
+    case EL_YAMYAM_DOWN:
     case EL_DARK_YAMYAM:
     case EL_ROBOT:
     case EL_PACMAN:
     case EL_SP_SNIKSNAK:
     case EL_SP_ELECTRON:
+    case EL_MOLE:
     case EL_MOLE_LEFT:
     case EL_MOLE_RIGHT:
     case EL_MOLE_UP:
     case EL_MOLE_DOWN:
-    case EL_MOLE:
       InitMovDir(x, y);
       break;
 
@@ -854,6 +1582,10 @@ static void InitField(int x, int y, boolean init_game)
       MovDelay[x][y] = 96;
       break;
 
+    case EL_EM_DYNAMITE_ACTIVE:
+      MovDelay[x][y] = 32;
+      break;
+
     case EL_LAMP:
       local_player->lights_still_needed++;
       break;
@@ -897,43 +1629,64 @@ static void InitField(int x, int y, boolean init_game)
       }
       break;
 
+#if !USE_BOTH_SWITCHGATE_SWITCHES
     case EL_SWITCHGATE_SWITCH_DOWN:    /* always start with same switch pos */
       if (init_game)
        Feld[x][y] = EL_SWITCHGATE_SWITCH_UP;
       break;
 
+    case EL_DC_SWITCHGATE_SWITCH_DOWN: /* always start with same switch pos */
+      if (init_game)
+       Feld[x][y] = EL_DC_SWITCHGATE_SWITCH_UP;
+      break;
+#endif
+
     case EL_LIGHT_SWITCH_ACTIVE:
       if (init_game)
        game.light_time_left = level.time_light * FRAMES_PER_SECOND;
       break;
 
-    default:
-      if (IS_CUSTOM_ELEMENT(element) && CAN_MOVE(element))
-       InitMovDir(x, y);
-      else if (IS_GROUP_ELEMENT(element))
-      {
-       struct ElementGroupInfo *group = element_info[element].group;
-       int last_anim_random_frame = gfx.anim_random_frame;
-       int element_pos;
-
-       if (group->choice_mode == ANIM_RANDOM)
-         gfx.anim_random_frame = RND(group->num_elements_resolved);
+    case EL_INVISIBLE_STEELWALL:
+    case EL_INVISIBLE_WALL:
+    case EL_INVISIBLE_SAND:
+      if (game.light_time_left > 0 ||
+         game.lenses_time_left > 0)
+        Feld[x][y] = getInvisibleActiveFromInvisibleElement(element);
+      break;
 
-       element_pos = getAnimationFrame(group->num_elements_resolved, 1,
-                                       group->choice_mode, 0,
-                                       group->choice_pos);
+    case EL_EMC_MAGIC_BALL:
+      if (game.ball_state)
+       Feld[x][y] = EL_EMC_MAGIC_BALL_ACTIVE;
+      break;
 
-       if (group->choice_mode == ANIM_RANDOM)
-         gfx.anim_random_frame = last_anim_random_frame;
+    case EL_EMC_MAGIC_BALL_SWITCH:
+      if (game.ball_state)
+       Feld[x][y] = EL_EMC_MAGIC_BALL_SWITCH_ACTIVE;
+      break;
 
-       group->choice_pos++;
+    default:
+      if (IS_CUSTOM_ELEMENT(element))
+      {
+       if (CAN_MOVE(element))
+         InitMovDir(x, y);
 
-       Feld[x][y] = group->element_resolved[element_pos];
+#if USE_NEW_CUSTOM_VALUE
+       if (!element_info[element].use_last_ce_value || init_game)
+         CustomValue[x][y] = GET_NEW_CE_VALUE(Feld[x][y]);
+#endif
+      }
+      else if (IS_GROUP_ELEMENT(element))
+      {
+       Feld[x][y] = GetElementFromGroupElement(element);
 
        InitField(x, y, init_game);
       }
+
       break;
   }
+
+  if (!init_game)
+    CheckTriggeredElementChange(x, y, element, CE_CREATION_OF_X);
 }
 
 static inline void InitField_WithBug1(int x, int y, boolean init_game)
@@ -967,190 +1720,770 @@ static inline void InitField_WithBug2(int x, int y, boolean init_game)
   */
 }
 
-inline void DrawGameValue_Emeralds(int value)
-{
-  DrawText(DX_EMERALDS, DY_EMERALDS, int2str(value, 3), FONT_TEXT_2);
-}
-
-inline void DrawGameValue_Dynamite(int value)
-{
-  DrawText(DX_DYNAMITE, DY_DYNAMITE, int2str(value, 3), FONT_TEXT_2);
-}
+#if 1
 
-inline void DrawGameValue_Keys(int key[MAX_NUM_KEYS])
+void InitGameControlValues()
 {
   int i;
 
-  /* currently only 4 of 8 possible keys are displayed */
-  for (i = 0; i < STD_NUM_KEYS; i++)
+  for (i = 0; i < NUM_GAME_CONTROLS; i++)
+    game_control_value[i] = last_game_control_value[i] = -1;
+
+  for (i = 0; game_controls[i].nr != -1; i++)
   {
-    if (key[i])
-      DrawMiniGraphicExt(drawto, DX_KEYS + i * MINI_TILEX, DY_KEYS,
-                        el2edimg(EL_KEY_1 + i));
-    else
-      BlitBitmap(graphic_info[IMG_GLOBAL_DOOR].bitmap, drawto,
-                DOOR_GFX_PAGEX5 + XX_KEYS + i * MINI_TILEX, YY_KEYS,
-                MINI_TILEX, MINI_TILEY, DX_KEYS + i * MINI_TILEX, DY_KEYS);
+    int nr = game_controls[i].nr;
+    int type = game_controls[i].type;
+    struct TextPosInfo *pos = game_controls[i].pos;
+
+    game_control_value[nr] = last_game_control_value[nr] = -1;
+
+    /* determine panel value width for later calculation of alignment */
+    if (type == TYPE_INTEGER || type == TYPE_STRING)
+      pos->width = pos->chars * getFontWidth(pos->font);
+    else if (type == TYPE_ELEMENT)
+      pos->width = MINI_TILESIZE;
   }
 }
 
-inline void DrawGameValue_Score(int value)
+void UpdateGameControlValues()
 {
-  DrawText(DX_SCORE, DY_SCORE, int2str(value, 5), FONT_TEXT_2);
-}
+  int i, j;
 
-inline void DrawGameValue_Time(int value)
-{
-  if (value < 1000)
-    DrawText(DX_TIME1, DY_TIME, int2str(value, 3), FONT_TEXT_2);
-  else
-    DrawText(DX_TIME2, DY_TIME, int2str(value, 4), FONT_LEVEL_NUMBER);
-}
+  game_control_value[GAME_CONTROL_LEVEL_NUMBER] = level_nr;
+  game_control_value[GAME_CONTROL_GEMS] = local_player->gems_still_needed;
 
-inline void DrawGameValue_Level(int value)
-{
-  if (level_nr < 100)
-    DrawText(DX_LEVEL, DY_LEVEL, int2str(value, 2), FONT_TEXT_2);
-  else
+  game_control_value[GAME_CONTROL_INVENTORY] = 0;
+  for (i = 0; i < MAX_NUM_KEYS; i++)
+    game_control_value[GAME_CONTROL_KEY_1 + i] = 0;
+  game_control_value[GAME_CONTROL_KEY_WHITE] = 0;
+  game_control_value[GAME_CONTROL_KEY_WHITE_COUNT] = 0;
+
+  if (game.centered_player_nr == -1)
   {
-    /* misuse area for displaying emeralds to draw bigger level number */
-    DrawTextExt(drawto, DX_EMERALDS, DY_EMERALDS,
-               int2str(value, 3), FONT_LEVEL_NUMBER, BLIT_OPAQUE);
+    for (i = 0; i < MAX_PLAYERS; i++)
+    {
+      for (j = 0; j < MAX_NUM_KEYS; j++)
+       if (stored_player[i].key[j])
+         game_control_value[GAME_CONTROL_KEY_1 + j] = 1;
 
-    /* now copy it to the area for displaying level number */
-    BlitBitmap(drawto, drawto,
-              DX_EMERALDS, DY_EMERALDS + 1,
-              getFontWidth(FONT_LEVEL_NUMBER) * 3,
-              getFontHeight(FONT_LEVEL_NUMBER) - 1,
-              DX_LEVEL - 1, DY_LEVEL + 1);
+      game_control_value[GAME_CONTROL_INVENTORY] +=
+       stored_player[i].inventory_size;
 
-    /* restore the area for displaying emeralds */
-    DrawGameValue_Emeralds(local_player->gems_still_needed);
+      if (stored_player[i].num_white_keys > 0)
+       game_control_value[GAME_CONTROL_KEY_WHITE] = 1;
 
-    /* yes, this is all really ugly :-) */
+      game_control_value[GAME_CONTROL_KEY_WHITE_COUNT] +=
+       stored_player[i].num_white_keys;
+    }
   }
-}
+  else
+  {
+    int player_nr = game.centered_player_nr;
 
-void DrawAllGameValues(int emeralds, int dynamite, int score, int time,
-                      int key_bits)
-{
-  int key[MAX_NUM_KEYS];
-  int i;
+    for (i = 0; i < MAX_NUM_KEYS; i++)
+      if (stored_player[player_nr].key[i])
+       game_control_value[GAME_CONTROL_KEY_1 + i] = 1;
 
-  for (i = 0; i < MAX_NUM_KEYS; i++)
-    key[i] = key_bits & (1 << i);
+    game_control_value[GAME_CONTROL_INVENTORY] +=
+      stored_player[player_nr].inventory_size;
 
-  DrawGameValue_Level(level_nr);
+    if (stored_player[player_nr].num_white_keys > 0)
+      game_control_value[GAME_CONTROL_KEY_WHITE] = 1;
 
-  DrawGameValue_Emeralds(emeralds);
-  DrawGameValue_Dynamite(dynamite);
-  DrawGameValue_Score(score);
-  DrawGameValue_Time(time);
+    game_control_value[GAME_CONTROL_KEY_WHITE_COUNT] +=
+      stored_player[player_nr].num_white_keys;
+  }
 
-  DrawGameValue_Keys(key);
-}
+  game_control_value[GAME_CONTROL_SCORE] = (local_player->LevelSolved ?
+                                           local_player->score_final :
+                                           local_player->score);
 
-void DrawGameDoorValues()
-{
-  int i;
+  game_control_value[GAME_CONTROL_TIME] = (level.time == 0 ?
+                                          TimePlayed :
+                                          TimeLeft);
 
-  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
-  {
-    DrawGameDoorValues_EM();
+  game_control_value[GAME_CONTROL_TIME_HH] = TapeTime / 3600;
+  game_control_value[GAME_CONTROL_TIME_MM] = (TapeTime / 60) % 60;
+  game_control_value[GAME_CONTROL_TIME_SS] = TapeTime % 60;
 
-    return;
+  for (i = 0; i < 8; i++)
+    game_control_value[GAME_CONTROL_DROP_NEXT_1 + i] = EL_UNDEFINED;
+
+  game_control_value[GAME_CONTROL_SHIELD_NORMAL] =
+    (local_player->shield_normal_time_left > 0 ? EL_SHIELD_NORMAL_ACTIVE :
+     EL_EMPTY);
+  game_control_value[GAME_CONTROL_SHIELD_NORMAL_TIME] =
+    local_player->shield_normal_time_left;
+  game_control_value[GAME_CONTROL_SHIELD_DEADLY] =
+    (local_player->shield_deadly_time_left > 0 ? EL_SHIELD_DEADLY_ACTIVE :
+     EL_EMPTY);
+  game_control_value[GAME_CONTROL_SHIELD_DEADLY_TIME] =
+    local_player->shield_deadly_time_left;
+
+  if (local_player->gems_still_needed > 0 ||
+      local_player->sokobanfields_still_needed > 0 ||
+      local_player->lights_still_needed > 0)
+  {
+    game_control_value[GAME_CONTROL_EXIT]          = EL_EXIT_CLOSED;
+    game_control_value[GAME_CONTROL_EM_EXIT]       = EL_EM_EXIT_CLOSED;
+    game_control_value[GAME_CONTROL_SP_EXIT]       = EL_SP_EXIT_CLOSED;
+    game_control_value[GAME_CONTROL_STEEL_EXIT]    = EL_STEEL_EXIT_CLOSED;
+    game_control_value[GAME_CONTROL_EM_STEEL_EXIT] = EL_EM_STEEL_EXIT_CLOSED;
+  }
+  else
+  {
+    game_control_value[GAME_CONTROL_EXIT]          = EL_EXIT_OPEN;
+    game_control_value[GAME_CONTROL_EM_EXIT]       = EL_EM_EXIT_OPEN;
+    game_control_value[GAME_CONTROL_SP_EXIT]       = EL_SP_EXIT_OPEN;
+    game_control_value[GAME_CONTROL_STEEL_EXIT]    = EL_STEEL_EXIT_OPEN;
+    game_control_value[GAME_CONTROL_EM_STEEL_EXIT] = EL_EM_STEEL_EXIT_OPEN;
   }
 
-  DrawGameValue_Level(level_nr);
+  game_control_value[GAME_CONTROL_EMC_MAGIC_BALL] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_EMC_MAGIC_BALL_SWITCH] = EL_UNDEFINED;
 
-  DrawGameValue_Emeralds(local_player->gems_still_needed);
-  DrawGameValue_Dynamite(local_player->inventory_size);
-  DrawGameValue_Score(local_player->score);
-  DrawGameValue_Time(TimeLeft);
+  game_control_value[GAME_CONTROL_LIGHT_SWITCH] =
+    (game.light_time_left > 0 ? EL_LIGHT_SWITCH_ACTIVE : EL_LIGHT_SWITCH);
+  game_control_value[GAME_CONTROL_LIGHT_SWITCH_TIME] = game.light_time_left;
 
-  for (i = 0; i < MAX_PLAYERS; i++)
-    DrawGameValue_Keys(stored_player[i].key);
+  game_control_value[GAME_CONTROL_TIMEGATE_SWITCH] =
+    (game.timegate_time_left > 0 ? EL_TIMEGATE_OPEN : EL_TIMEGATE_CLOSED);
+  game_control_value[GAME_CONTROL_TIMEGATE_SWITCH_TIME] =
+    game.timegate_time_left;
+
+  game_control_value[GAME_CONTROL_SWITCHGATE_SWITCH] = EL_UNDEFINED;
+
+  game_control_value[GAME_CONTROL_EMC_LENSES] =
+    (game.lenses_time_left > 0 ? EL_EMC_LENSES : EL_EMPTY);
+  game_control_value[GAME_CONTROL_EMC_LENSES_TIME] = game.lenses_time_left;
+
+  game_control_value[GAME_CONTROL_EMC_MAGNIFIER] =
+    (game.magnify_time_left > 0 ? EL_EMC_MAGNIFIER : EL_EMPTY);
+  game_control_value[GAME_CONTROL_EMC_MAGNIFIER_TIME] = game.magnify_time_left;
+
+  game_control_value[GAME_CONTROL_BALLOON_SWITCH] =
+    (game.wind_direction == MV_LEFT  ? EL_BALLOON_SWITCH_LEFT  :
+     game.wind_direction == MV_RIGHT ? EL_BALLOON_SWITCH_RIGHT :
+     game.wind_direction == MV_UP    ? EL_BALLOON_SWITCH_UP    :
+     game.wind_direction == MV_DOWN  ? EL_BALLOON_SWITCH_DOWN  :
+     EL_BALLOON_SWITCH_NONE);
+
+  game_control_value[GAME_CONTROL_DYNABOMB_NUMBER] =
+    local_player->dynabomb_count;
+  game_control_value[GAME_CONTROL_DYNABOMB_SIZE] =
+    local_player->dynabomb_size;
+  game_control_value[GAME_CONTROL_DYNABOMB_POWER] =
+    (local_player->dynabomb_xl ? EL_DYNABOMB_INCREASE_POWER : EL_EMPTY);
+
+  game_control_value[GAME_CONTROL_PENGUINS] =
+    local_player->friends_still_needed;
+
+  game_control_value[GAME_CONTROL_SOKOBAN_OBJECTS] =
+    local_player->sokobanfields_still_needed;
+  game_control_value[GAME_CONTROL_SOKOBAN_FIELDS] =
+    local_player->sokobanfields_still_needed;
+
+  game_control_value[GAME_CONTROL_ROBOT_WHEEL] = EL_UNDEFINED;
+
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_1] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_1_SWITCH] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_2] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_2_SWITCH] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_3] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_3_SWITCH] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_4] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_CONVEYOR_BELT_4_SWITCH] = EL_UNDEFINED;
+
+  game_control_value[GAME_CONTROL_MAGIC_WALL] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_MAGIC_WALL_TIME] =
+    game.magic_wall_time_left;
+  game_control_value[GAME_CONTROL_BD_MAGIC_WALL] = EL_UNDEFINED;
+  game_control_value[GAME_CONTROL_DC_MAGIC_WALL] = EL_UNDEFINED;
+
+  game_control_value[GAME_CONTROL_PLAYER_NAME] = 0;
+  game_control_value[GAME_CONTROL_LEVEL_NAME] = 0;
+  game_control_value[GAME_CONTROL_LEVEL_AUTHOR] = 0;
 }
 
-static void resolve_group_element(int group_element, int recursion_depth)
+void DisplayGameControlValues()
 {
-  static int group_nr;
-  static struct ElementGroupInfo *group;
-  struct ElementGroupInfo *actual_group = element_info[group_element].group;
   int i;
 
-  if (recursion_depth > NUM_GROUP_ELEMENTS)    /* recursion too deep */
+  for (i = 0; game_controls[i].nr != -1; i++)
   {
-    Error(ERR_WARN, "recursion too deep when resolving group element %d",
-         group_element - EL_GROUP_START + 1);
+    int nr = game_controls[i].nr;
+    int type = game_controls[i].type;
+    struct TextPosInfo *pos = game_controls[i].pos;
+    int value = game_control_value[nr];
+    int last_value = last_game_control_value[nr];
+    int chars = pos->chars;
+    int font = pos->font;
 
-    /* replace element which caused too deep recursion by question mark */
-    group->element_resolved[group->num_elements_resolved++] = EL_UNKNOWN;
+    if (value == last_value)
+      continue;
 
-    return;
-  }
+    last_game_control_value[nr] = value;
 
-  if (recursion_depth == 0)                    /* initialization */
-  {
-    group = element_info[group_element].group;
-    group_nr = group_element - EL_GROUP_START;
+#if 0
+    printf("::: value %d changed from %d to %d\n", nr, last_value, value);
+#endif
 
-    group->num_elements_resolved = 0;
-    group->choice_pos = 0;
-  }
+    if (PANEL_DEACTIVATED(pos))
+      continue;
 
-  for (i = 0; i < actual_group->num_elements; i++)
-  {
-    int element = actual_group->element[i];
+    if (type == TYPE_INTEGER)
+    {
+      if (nr == GAME_CONTROL_LEVEL_NUMBER || nr == GAME_CONTROL_TIME)
+      {
+       boolean use_dynamic_chars = (pos->chars == -1 ? TRUE : FALSE);
 
-    if (group->num_elements_resolved == NUM_FILE_ELEMENTS)
-      break;
+       if (use_dynamic_chars)          /* use dynamic number of chars */
+       {
+         int value_change = (nr == GAME_CONTROL_LEVEL_NUMBER ? 100 : 1000);
+         int chars1 = (nr == GAME_CONTROL_LEVEL_NUMBER ? 2 : 3);
+         int chars2 = chars1 + 1;
+         int font1 = pos->font;
+         int font2 = pos->font_alt;
 
-    if (IS_GROUP_ELEMENT(element))
-      resolve_group_element(element, recursion_depth + 1);
-    else
+         chars = (value < value_change ? chars1 : chars2);
+         font  = (value < value_change ? font1  : font2);
+
+         /* clear background if value just changed its size (dynamic chars) */
+         if ((last_value < value_change) != (value < value_change))
+         {
+           int width1 = chars1 * getFontWidth(font1);
+           int width2 = chars2 * getFontWidth(font2);
+           int max_width = MAX(width1, width2);
+           int max_height = MAX(getFontHeight(font1), getFontHeight(font2));
+
+           pos->width = max_width;
+
+           ClearRectangleOnBackground(drawto, PANEL_XPOS(pos), PANEL_YPOS(pos),
+                                      max_width, max_height);
+         }
+       }
+
+       pos->width = chars * getFontWidth(font);
+      }
+
+      DrawText(PANEL_XPOS(pos), PANEL_YPOS(pos), int2str(value, chars), font);
+    }
+    else if (type == TYPE_ELEMENT)
+    {
+      if (nr >= GAME_CONTROL_KEY_1 && nr <= GAME_CONTROL_KEY_8)
+      {
+       int key_nr = nr - GAME_CONTROL_KEY_1;
+       int src_x = DOOR_GFX_PAGEX5 + 18 + (key_nr % STD_NUM_KEYS) * MINI_TILEX;
+       int src_y = DOOR_GFX_PAGEY1 + 123;
+       int dst_x = PANEL_XPOS(pos);
+       int dst_y = PANEL_YPOS(pos);
+       int element = (key_nr >= STD_NUM_KEYS ? EL_EMC_KEY_5 - STD_NUM_KEYS :
+                      level.game_engine_type == GAME_ENGINE_TYPE_EM ?
+                      EL_EM_KEY_1 : EL_KEY_1) + key_nr;
+       int graphic = el2edimg(element);
+
+       if (value)
+         DrawMiniGraphicExt(drawto, dst_x, dst_y, graphic);
+       else
+         BlitBitmap(graphic_info[IMG_GLOBAL_DOOR].bitmap, drawto, src_x, src_y,
+                    MINI_TILEX, MINI_TILEY, dst_x, dst_y);
+      }
+      else if (value != EL_UNDEFINED)
+      {
+       int graphic = el2edimg(value);
+       int dst_x = PANEL_XPOS(pos);
+       int dst_y = PANEL_YPOS(pos);
+
+       DrawMiniGraphicExt(drawto, dst_x, dst_y, graphic);
+      }
+    }
+    else if (type == TYPE_STRING)
     {
-      group->element_resolved[group->num_elements_resolved++] = element;
-      element_info[element].in_group[group_nr] = TRUE;
+      char *s = (nr == GAME_CONTROL_PLAYER_NAME  ? setup.player_name :
+                nr == GAME_CONTROL_LEVEL_NAME   ? level.name :
+                nr == GAME_CONTROL_LEVEL_AUTHOR ? level.author : NULL);
+
+      if (s != NULL)
+      {
+       char *s_cut = getStringCopyN(s, pos->chars);
+
+       DrawText(PANEL_XPOS(pos), PANEL_YPOS(pos), s_cut, pos->font);
+
+       free(s_cut);
+      }
     }
+
+    redraw_mask |= REDRAW_DOOR_1;
   }
 }
 
+void DrawGameValue_Emeralds(int value)
+{
+  struct TextPosInfo *pos = &game.panel.gems;
+#if 1
+  int font_nr = pos->font;
+#else
+  int font_nr = FONT_TEXT_2;
+#endif
+  int font_width = getFontWidth(font_nr);
+  int chars = pos->chars;
 
-/*
-  =============================================================================
-  InitGameEngine()
-  -----------------------------------------------------------------------------
-  initialize game engine due to level / tape version number
-  =============================================================================
-*/
+#if 1
+  return;      /* !!! USE NEW STUFF !!! */
+#endif
 
-static void InitGameEngine()
+  if (PANEL_DEACTIVATED(pos))
+    return;
+
+  pos->width = chars * font_width;
+
+  DrawText(PANEL_XPOS(pos), PANEL_YPOS(pos), int2str(value, chars), font_nr);
+}
+
+void DrawGameValue_Dynamite(int value)
 {
-  int i, j, k, l;
+  struct TextPosInfo *pos = &game.panel.inventory;
+#if 1
+  int font_nr = pos->font;
+#else
+  int font_nr = FONT_TEXT_2;
+#endif
+  int font_width = getFontWidth(font_nr);
+  int chars = pos->chars;
 
-  /* set game engine from tape file when re-playing, else from level file */
-  game.engine_version = (tape.playing ? tape.engine_version :
-                        level.game_version);
+#if 1
+  return;      /* !!! USE NEW STUFF !!! */
+#endif
 
-  /* ---------------------------------------------------------------------- */
-  /* set flags for bugs and changes according to active game engine version */
-  /* ---------------------------------------------------------------------- */
+  if (PANEL_DEACTIVATED(pos))
+    return;
 
-  /*
-    Summary of bugfix/change:
-    Fixed handling for custom elements that change when pushed by the player.
+  pos->width = chars * font_width;
 
-    Fixed/changed in version:
-    3.1.0
+  DrawText(PANEL_XPOS(pos), PANEL_YPOS(pos), int2str(value, chars), font_nr);
+}
 
-    Description:
-    Before 3.1.0, custom elements that "change when pushing" changed directly
-    after the player started pushing them (until then handled in "DigField()").
-    Since 3.1.0, these custom elements are not changed until the "pushing"
-    move of the element is finished (now handled in "ContinueMoving()").
+void DrawGameValue_Score(int value)
+{
+  struct TextPosInfo *pos = &game.panel.score;
+#if 1
+  int font_nr = pos->font;
+#else
+  int font_nr = FONT_TEXT_2;
+#endif
+  int font_width = getFontWidth(font_nr);
+  int chars = pos->chars;
 
-    Affected levels/tapes:
+#if 1
+  return;      /* !!! USE NEW STUFF !!! */
+#endif
+
+  if (PANEL_DEACTIVATED(pos))
+    return;
+
+  pos->width = chars * font_width;
+
+  DrawText(PANEL_XPOS(pos), PANEL_YPOS(pos), int2str(value, chars), font_nr);
+}
+
+void DrawGameValue_Time(int value)
+{
+  struct TextPosInfo *pos = &game.panel.time;
+  static int last_value = -1;
+  int chars1 = 3;
+  int chars2 = 4;
+  int chars = pos->chars;
+#if 1
+  int font1_nr = pos->font;
+  int font2_nr = pos->font_alt;
+#else
+  int font1_nr = FONT_TEXT_2;
+  int font2_nr = FONT_TEXT_1;
+#endif
+  int font_nr = font1_nr;
+  boolean use_dynamic_chars = (chars == -1 ? TRUE : FALSE);
+
+#if 1
+  return;      /* !!! USE NEW STUFF !!! */
+#endif
+
+  if (PANEL_DEACTIVATED(pos))
+    return;
+
+  if (use_dynamic_chars)               /* use dynamic number of chars */
+  {
+    chars   = (value < 1000 ? chars1   : chars2);
+    font_nr = (value < 1000 ? font1_nr : font2_nr);
+  }
+
+  /* clear background if value just changed its size (dynamic chars only) */
+  if (use_dynamic_chars && (last_value < 1000) != (value < 1000))
+  {
+    int width1 = chars1 * getFontWidth(font1_nr);
+    int width2 = chars2 * getFontWidth(font2_nr);
+    int max_width = MAX(width1, width2);
+    int max_height = MAX(getFontHeight(font1_nr), getFontHeight(font2_nr));
+
+    pos->width = max_width;
+
+    ClearRectangleOnBackground(drawto, PANEL_XPOS(pos), PANEL_YPOS(pos),
+                              max_width, max_height);
+  }
+
+  pos->width = chars * getFontWidth(font_nr);
+
+  DrawText(PANEL_XPOS(pos), PANEL_YPOS(pos), int2str(value, chars), font_nr);
+
+  last_value = value;
+}
+
+void DrawGameValue_Level(int value)
+{
+  struct TextPosInfo *pos = &game.panel.level_number;
+  int chars1 = 2;
+  int chars2 = 3;
+  int chars = pos->chars;
+#if 1
+  int font1_nr = pos->font;
+  int font2_nr = pos->font_alt;
+#else
+  int font1_nr = FONT_TEXT_2;
+  int font2_nr = FONT_TEXT_1;
+#endif
+  int font_nr = font1_nr;
+  boolean use_dynamic_chars = (chars == -1 ? TRUE : FALSE);
+
+#if 1
+  return;      /* !!! USE NEW STUFF !!! */
+#endif
+
+  if (PANEL_DEACTIVATED(pos))
+    return;
+
+  if (use_dynamic_chars)               /* use dynamic number of chars */
+  {
+    chars   = (level_nr < 100 ? chars1   : chars2);
+    font_nr = (level_nr < 100 ? font1_nr : font2_nr);
+  }
+
+  pos->width = chars * getFontWidth(font_nr);
+
+  DrawText(PANEL_XPOS(pos), PANEL_YPOS(pos), int2str(value, chars), font_nr);
+}
+
+void DrawGameValue_Keys(int key[MAX_NUM_KEYS])
+{
+#if 0
+  struct TextPosInfo *pos = &game.panel.keys;
+#endif
+#if 0
+  int base_key_graphic = EL_KEY_1;
+#endif
+  int i;
+
+#if 1
+  return;      /* !!! USE NEW STUFF !!! */
+#endif
+
+#if 0
+  if (PANEL_DEACTIVATED(pos))
+    return;
+#endif
+
+#if 0
+  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
+    base_key_graphic = EL_EM_KEY_1;
+#endif
+
+#if 0
+  pos->width = 4 * MINI_TILEX;
+#endif
+
+#if 1
+  for (i = 0; i < MAX_NUM_KEYS; i++)
+#else
+  /* currently only 4 of 8 possible keys are displayed */
+  for (i = 0; i < STD_NUM_KEYS; i++)
+#endif
+  {
+#if 1
+    struct TextPosInfo *pos = &game.panel.key[i];
+#endif
+    int src_x = DOOR_GFX_PAGEX5 + 18 + (i % 4) * MINI_TILEX;
+    int src_y = DOOR_GFX_PAGEY1 + 123;
+#if 1
+    int dst_x = PANEL_XPOS(pos);
+    int dst_y = PANEL_YPOS(pos);
+#else
+    int dst_x = PANEL_XPOS(pos) + i * MINI_TILEX;
+    int dst_y = PANEL_YPOS(pos);
+#endif
+
+#if 1
+    int element = (i >= STD_NUM_KEYS ? EL_EMC_KEY_5 - 4 :
+                  level.game_engine_type == GAME_ENGINE_TYPE_EM ? EL_EM_KEY_1 :
+                  EL_KEY_1) + i;
+    int graphic = el2edimg(element);
+#endif
+
+#if 1
+    if (PANEL_DEACTIVATED(pos))
+      continue;
+#endif
+
+#if 0
+    /* masked blit with tiles from half-size scaled bitmap does not work yet
+       (no mask bitmap created for these sizes after loading and scaling) --
+       solution: load without creating mask, scale, then create final mask */
+
+    BlitBitmap(graphic_info[IMG_GLOBAL_DOOR].bitmap, drawto, src_x, src_y,
+              MINI_TILEX, MINI_TILEY, dst_x, dst_y);
+
+    if (key[i])
+    {
+#if 0
+      int graphic = el2edimg(base_key_graphic + i);
+#endif
+      Bitmap *src_bitmap;
+      int src_x, src_y;
+
+      getMiniGraphicSource(graphic, &src_bitmap, &src_x, &src_y);
+
+      SetClipOrigin(src_bitmap, src_bitmap->stored_clip_gc,
+                   dst_x - src_x, dst_y - src_y);
+      BlitBitmapMasked(src_bitmap, drawto, src_x, src_y, MINI_TILEX, MINI_TILEY,
+                      dst_x, dst_y);
+    }
+#else
+#if 1
+    if (key[i])
+      DrawMiniGraphicExt(drawto, dst_x, dst_y, graphic);
+    else
+      BlitBitmap(graphic_info[IMG_GLOBAL_DOOR].bitmap, drawto, src_x, src_y,
+                MINI_TILEX, MINI_TILEY, dst_x, dst_y);
+#else
+    if (key[i])
+      DrawMiniGraphicExt(drawto, dst_x, dst_y, el2edimg(base_key_graphic + i));
+    else
+      BlitBitmap(graphic_info[IMG_GLOBAL_DOOR].bitmap, drawto, src_x, src_y,
+                MINI_TILEX, MINI_TILEY, dst_x, dst_y);
+#endif
+#endif
+  }
+}
+
+#else
+
+void DrawGameValue_Emeralds(int value)
+{
+  int font_nr = FONT_TEXT_2;
+  int xpos = (3 * 14 - 3 * getFontWidth(font_nr)) / 2;
+
+  if (PANEL_DEACTIVATED(game.panel.gems))
+    return;
+
+  DrawText(DX_EMERALDS + xpos, DY_EMERALDS, int2str(value, 3), font_nr);
+}
+
+void DrawGameValue_Dynamite(int value)
+{
+  int font_nr = FONT_TEXT_2;
+  int xpos = (3 * 14 - 3 * getFontWidth(font_nr)) / 2;
+
+  if (PANEL_DEACTIVATED(game.panel.inventory))
+    return;
+
+  DrawText(DX_DYNAMITE + xpos, DY_DYNAMITE, int2str(value, 3), font_nr);
+}
+
+void DrawGameValue_Score(int value)
+{
+  int font_nr = FONT_TEXT_2;
+  int xpos = (5 * 14 - 5 * getFontWidth(font_nr)) / 2;
+
+  if (PANEL_DEACTIVATED(game.panel.score))
+    return;
+
+  DrawText(DX_SCORE + xpos, DY_SCORE, int2str(value, 5), font_nr);
+}
+
+void DrawGameValue_Time(int value)
+{
+  int font1_nr = FONT_TEXT_2;
+#if 1
+  int font2_nr = FONT_TEXT_1;
+#else
+  int font2_nr = FONT_LEVEL_NUMBER;
+#endif
+  int xpos3 = (3 * 14 - 3 * getFontWidth(font1_nr)) / 2;
+  int xpos4 = (4 * 10 - 4 * getFontWidth(font2_nr)) / 2;
+
+  if (PANEL_DEACTIVATED(game.panel.time))
+    return;
+
+  /* clear background if value just changed its size */
+  if (value == 999 || value == 1000)
+    ClearRectangleOnBackground(drawto, DX_TIME1, DY_TIME, 14 * 3, 14);
+
+  if (value < 1000)
+    DrawText(DX_TIME1 + xpos3, DY_TIME, int2str(value, 3), font1_nr);
+  else
+    DrawText(DX_TIME2 + xpos4, DY_TIME, int2str(value, 4), font2_nr);
+}
+
+void DrawGameValue_Level(int value)
+{
+  int font1_nr = FONT_TEXT_2;
+#if 1
+  int font2_nr = FONT_TEXT_1;
+#else
+  int font2_nr = FONT_LEVEL_NUMBER;
+#endif
+
+  if (PANEL_DEACTIVATED(game.panel.level))
+    return;
+
+  if (level_nr < 100)
+    DrawText(DX_LEVEL1, DY_LEVEL, int2str(value, 2), font1_nr);
+  else
+    DrawText(DX_LEVEL2, DY_LEVEL, int2str(value, 3), font2_nr);
+}
+
+void DrawGameValue_Keys(int key[MAX_NUM_KEYS])
+{
+  int base_key_graphic = EL_KEY_1;
+  int i;
+
+  if (PANEL_DEACTIVATED(game.panel.keys))
+    return;
+
+  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
+    base_key_graphic = EL_EM_KEY_1;
+
+  /* currently only 4 of 8 possible keys are displayed */
+  for (i = 0; i < STD_NUM_KEYS; i++)
+  {
+    int x = XX_KEYS + i * MINI_TILEX;
+    int y = YY_KEYS;
+
+    if (key[i])
+      DrawMiniGraphicExt(drawto, DX + x,DY + y, el2edimg(base_key_graphic + i));
+    else
+      BlitBitmap(graphic_info[IMG_GLOBAL_DOOR].bitmap, drawto,
+                DOOR_GFX_PAGEX5 + x, y, MINI_TILEX, MINI_TILEY, DX + x,DY + y);
+  }
+}
+
+#endif
+
+void DrawAllGameValues(int emeralds, int dynamite, int score, int time,
+                      int key_bits)
+{
+  int key[MAX_NUM_KEYS];
+  int i;
+
+  /* prevent EM engine from updating time/score values parallel to GameWon() */
+  if (level.game_engine_type == GAME_ENGINE_TYPE_EM &&
+      local_player->LevelSolved)
+    return;
+
+  for (i = 0; i < MAX_NUM_KEYS; i++)
+    key[i] = key_bits & (1 << i);
+
+  DrawGameValue_Level(level_nr);
+
+  DrawGameValue_Emeralds(emeralds);
+  DrawGameValue_Dynamite(dynamite);
+  DrawGameValue_Score(score);
+  DrawGameValue_Time(time);
+
+  DrawGameValue_Keys(key);
+}
+
+void DrawGameDoorValues()
+{
+  UpdateGameControlValues();
+  DisplayGameControlValues();
+}
+
+void DrawGameDoorValues_OLD()
+{
+  int time_value = (level.time == 0 ? TimePlayed : TimeLeft);
+  int dynamite_value = 0;
+  int score_value = (local_player->LevelSolved ? local_player->score_final :
+                    local_player->score);
+  int gems_value = local_player->gems_still_needed;
+  int key_bits = 0;
+  int i, j;
+
+  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
+  {
+    DrawGameDoorValues_EM();
+
+    return;
+  }
+
+  if (game.centered_player_nr == -1)
+  {
+    for (i = 0; i < MAX_PLAYERS; i++)
+    {
+      for (j = 0; j < MAX_NUM_KEYS; j++)
+       if (stored_player[i].key[j])
+         key_bits |= (1 << j);
+
+      dynamite_value += stored_player[i].inventory_size;
+    }
+  }
+  else
+  {
+    int player_nr = game.centered_player_nr;
+
+    for (i = 0; i < MAX_NUM_KEYS; i++)
+      if (stored_player[player_nr].key[i])
+       key_bits |= (1 << i);
+
+    dynamite_value = stored_player[player_nr].inventory_size;
+  }
+
+  DrawAllGameValues(gems_value, dynamite_value, score_value, time_value,
+                   key_bits);
+}
+
+
+/*
+  =============================================================================
+  InitGameEngine()
+  -----------------------------------------------------------------------------
+  initialize game engine due to level / tape version number
+  =============================================================================
+*/
+
+static void InitGameEngine()
+{
+  int i, j, k, l, x, y;
+
+  /* set game engine from tape file when re-playing, else from level file */
+  game.engine_version = (tape.playing ? tape.engine_version :
+                        level.game_version);
+
+  /* ---------------------------------------------------------------------- */
+  /* set flags for bugs and changes according to active game engine version */
+  /* ---------------------------------------------------------------------- */
+
+  /*
+    Summary of bugfix/change:
+    Fixed handling for custom elements that change when pushed by the player.
+
+    Fixed/changed in version:
+    3.1.0
+
+    Description:
+    Before 3.1.0, custom elements that "change when pushing" changed directly
+    after the player started pushing them (until then handled in "DigField()").
+    Since 3.1.0, these custom elements are not changed until the "pushing"
+    move of the element is finished (now handled in "ContinueMoving()").
+
+    Affected levels/tapes:
     The first condition is generally needed for all levels/tapes before version
     3.1.0, which might use the old behaviour before it was changed; known tapes
     that are affected are some tapes from the level set "Walpurgis Gardens" by
@@ -1199,8 +2532,43 @@ static void InitGameEngine()
   game.use_block_last_field_bug =
     (game.engine_version < VERSION_IDENT(3,1,1,0));
 
+  /*
+    Summary of bugfix/change:
+    Changed behaviour of CE changes with multiple changes per single frame.
+
+    Fixed/changed in version:
+    3.2.0-6
+
+    Description:
+    Before 3.2.0-6, only one single CE change was allowed in each engine frame.
+    This resulted in race conditions where CEs seem to behave strange in some
+    situations (where triggered CE changes were just skipped because there was
+    already a CE change on that tile in the playfield in that engine frame).
+    Since 3.2.0-6, this was changed to allow up to MAX_NUM_CHANGES_PER_FRAME.
+    (The number of changes per frame must be limited in any case, because else
+    it is easily possible to define CE changes that would result in an infinite
+    loop, causing the whole game to freeze. The MAX_NUM_CHANGES_PER_FRAME value
+    should be set large enough so that it would only be reached in cases where
+    the corresponding CE change conditions run into a loop. Therefore, it seems
+    to be reasonable to set MAX_NUM_CHANGES_PER_FRAME to the same value as the
+    maximal number of change pages for custom elements.)
+
+    Affected levels/tapes:
+    Probably many.
+  */
+
+#if USE_ONLY_ONE_CHANGE_PER_FRAME
+  game.max_num_changes_per_frame = 1;
+#else
+  game.max_num_changes_per_frame =
+    (game.engine_version < VERSION_IDENT(3,2,0,6) ? 1 : 32);
+#endif
+
   /* ---------------------------------------------------------------------- */
 
+  /* default scan direction: scan playfield from top/left to bottom/right */
+  InitPlayfieldScanMode(CA_ARG_SCAN_MODE_NORMAL);
+
   /* dynamically adjust element properties according to game engine version */
   InitElementPropertiesEngine(game.engine_version);
 
@@ -1212,35 +2580,18 @@ static void InitGameEngine()
   printf("       => game.engine_version == %06d\n", game.engine_version);
 #endif
 
-  /* ---------- recursively resolve group elements ------------------------- */
-
-  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
-    for (j = 0; j < NUM_GROUP_ELEMENTS; j++)
-      element_info[i].in_group[j] = FALSE;
-
-  for (i = 0; i < NUM_GROUP_ELEMENTS; i++)
-    resolve_group_element(EL_GROUP_START + i, 0);
-
   /* ---------- initialize player's initial move delay --------------------- */
 
-#if USE_NEW_MOVE_DELAY
   /* dynamically adjust player properties according to level information */
-  game.initial_move_delay_value =
-    (level.double_speed ? MOVE_DELAY_HIGH_SPEED : MOVE_DELAY_NORMAL_SPEED);
+  for (i = 0; i < MAX_PLAYERS; i++)
+    game.initial_move_delay_value[i] =
+      get_move_delay_from_stepsize(level.initial_player_stepsize[i]);
 
   /* dynamically adjust player properties according to game engine version */
-  game.initial_move_delay = (game.engine_version <= VERSION_IDENT(2,0,1,0) ?
-                            game.initial_move_delay_value : 0);
-#else
-  /* dynamically adjust player properties according to game engine version */
-  game.initial_move_delay =
-    (game.engine_version <= VERSION_IDENT(2,0,1,0) ? INITIAL_MOVE_DELAY_ON :
-     INITIAL_MOVE_DELAY_OFF);
-
-  /* dynamically adjust player properties according to level information */
-  game.initial_move_delay_value =
-    (level.double_speed ? MOVE_DELAY_HIGH_SPEED : MOVE_DELAY_NORMAL_SPEED);
-#endif
+  for (i = 0; i < MAX_PLAYERS; i++)
+    game.initial_move_delay[i] =
+      (game.engine_version <= VERSION_IDENT(2,0,1,0) ?
+       game.initial_move_delay_value[i] : 0);
 
   /* ---------- initialize player's initial push delay --------------------- */
 
@@ -1288,12 +2639,29 @@ static void InitGameEngine()
     ei->change->change_function      = ch_delay->change_function;
     ei->change->post_change_function = ch_delay->post_change_function;
 
+    ei->change->can_change = TRUE;
+    ei->change->can_change_or_has_action = TRUE;
+
     ei->has_change_event[CE_DELAY] = TRUE;
 
     SET_PROPERTY(ch_delay->element, EP_CAN_CHANGE, TRUE);
     SET_PROPERTY(ch_delay->element, EP_CAN_CHANGE_OR_HAS_ACTION, TRUE);
   }
 
+  /* ---------- initialize internal run-time variables ------------- */
+
+  for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+  {
+    struct ElementInfo *ei = &element_info[EL_CUSTOM_START + i];
+
+    for (j = 0; j < ei->num_change_pages; j++)
+    {
+      ei->change_page[j].can_change_or_has_action =
+       (ei->change_page[j].can_change |
+        ei->change_page[j].has_action);
+    }
+  }
+
   /* add change events from custom element configuration */
   for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
   {
@@ -1301,7 +2669,7 @@ static void InitGameEngine()
 
     for (j = 0; j < ei->num_change_pages; j++)
     {
-      if (!ei->change_page[j].can_change)
+      if (!ei->change_page[j].can_change_or_has_action)
        continue;
 
       for (k = 0; k < NUM_CHANGE_EVENTS; k++)
@@ -1318,20 +2686,6 @@ static void InitGameEngine()
     }
   }
 
-  /* ---------- initialize internal run-time variables ------------- */
-
-  for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
-  {
-    struct ElementInfo *ei = &element_info[EL_CUSTOM_START + i];
-
-    for (j = 0; j < ei->num_change_pages; j++)
-    {
-      ei->change_page[j].can_change_or_has_action =
-       (ei->change_page[j].can_change |
-        ei->change_page[j].has_action);
-    }
-  }
-
   /* ---------- initialize run-time trigger player and element ------------- */
 
   for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
@@ -1342,6 +2696,9 @@ static void InitGameEngine()
     {
       ei->change_page[j].actual_trigger_element = EL_EMPTY;
       ei->change_page[j].actual_trigger_player = EL_PLAYER_1;
+      ei->change_page[j].actual_trigger_side = CH_SIDE_NONE;
+      ei->change_page[j].actual_trigger_ce_value = 0;
+      ei->change_page[j].actual_trigger_ce_score = 0;
     }
   }
 
@@ -1359,7 +2716,7 @@ static void InitGameEngine()
 
     for (j = 0; j < ei->num_change_pages; j++)
     {
-      if (!ei->change_page[j].can_change)
+      if (!ei->change_page[j].can_change_or_has_action)
        continue;
 
       if (ei->change_page[j].has_event[CE_BY_OTHER_ACTION])
@@ -1378,6 +2735,9 @@ static void InitGameEngine()
              for (l = 0; l < group->num_elements_resolved; l++)
                trigger_events[group->element_resolved[l]][k] = TRUE;
            }
+           else if (trigger_element == EL_ANY_ELEMENT)
+             for (l = 0; l < MAX_NUM_ELEMENTS; l++)
+               trigger_events[l][k] = TRUE;
            else
              trigger_events[trigger_element][k] = TRUE;
          }
@@ -1393,8 +2753,17 @@ static void InitGameEngine()
   {
     if (!IS_CUSTOM_ELEMENT(i))
     {
-      element_info[i].push_delay_fixed  = game.default_push_delay_fixed;
-      element_info[i].push_delay_random = game.default_push_delay_random;
+      /* set default push delay values (corrected since version 3.0.7-1) */
+      if (game.engine_version < VERSION_IDENT(3,0,7,1))
+      {
+       element_info[i].push_delay_fixed = 2;
+       element_info[i].push_delay_random = 8;
+      }
+      else
+      {
+       element_info[i].push_delay_fixed = 8;
+       element_info[i].push_delay_random = 8;
+      }
     }
   }
 
@@ -1414,16 +2783,11 @@ static void InitGameEngine()
     {
       if (IS_SP_ELEMENT(i))
       {
-#if USE_NEW_MOVE_STYLE
        /* set SP push delay to just enough to push under a falling zonk */
        int delay = (game.engine_version >= VERSION_IDENT(3,1,1,0) ? 8 : 6);
 
        element_info[i].push_delay_fixed  = delay;
        element_info[i].push_delay_random = 0;
-#else
-       element_info[i].push_delay_fixed  = 6;  /* just enough to escape ... */
-       element_info[i].push_delay_random = 0;  /* ... from falling zonk     */
-#endif
       }
     }
   }
@@ -1443,16 +2807,23 @@ static void InitGameEngine()
     element_info[e].move_stepsize = move_stepsize_list[i].move_stepsize;
   }
 
-  /* ---------- initialize gem count --------------------------------------- */
+  /* ---------- initialize collect score ----------------------------------- */
+
+  /* initialize collect score values for custom elements from initial value */
+  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
+    if (IS_CUSTOM_ELEMENT(i))
+      element_info[i].collect_score = element_info[i].collect_score_initial;
+
+  /* ---------- initialize collect count ----------------------------------- */
 
-  /* initialize gem count values for each element */
+  /* initialize collect count values for non-custom elements */
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
     if (!IS_CUSTOM_ELEMENT(i))
-      element_info[i].collect_count = 0;
+      element_info[i].collect_count_initial = 0;
 
-  /* add gem count values for all elements from pre-defined list */
+  /* add collect count values for all elements from pre-defined list */
   for (i = 0; collect_count_list[i].element != EL_UNDEFINED; i++)
-    element_info[collect_count_list[i].element].collect_count =
+    element_info[collect_count_list[i].element].collect_count_initial =
       collect_count_list[i].count;
 
   /* ---------- initialize access direction -------------------------------- */
@@ -1466,6 +2837,74 @@ static void InitGameEngine()
   for (i = 0; access_direction_list[i].element != EL_UNDEFINED; i++)
     element_info[access_direction_list[i].element].access_direction =
       access_direction_list[i].direction;
+
+  /* ---------- initialize explosion content ------------------------------- */
+  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
+  {
+    if (IS_CUSTOM_ELEMENT(i))
+      continue;
+
+    for (y = 0; y < 3; y++) for (x = 0; x < 3; x++)
+    {
+      /* (content for EL_YAMYAM set at run-time with game.yamyam_content_nr) */
+
+      element_info[i].content.e[x][y] =
+       (i == EL_PLAYER_1 ? EL_EMERALD_YELLOW :
+        i == EL_PLAYER_2 ? EL_EMERALD_RED :
+        i == EL_PLAYER_3 ? EL_EMERALD :
+        i == EL_PLAYER_4 ? EL_EMERALD_PURPLE :
+        i == EL_MOLE ? EL_EMERALD_RED :
+        i == EL_PENGUIN ? EL_EMERALD_PURPLE :
+        i == EL_BUG ? (x == 1 && y == 1 ? EL_DIAMOND : EL_EMERALD) :
+        i == EL_BD_BUTTERFLY ? EL_BD_DIAMOND :
+        i == EL_SP_ELECTRON ? EL_SP_INFOTRON :
+        i == EL_AMOEBA_TO_DIAMOND ? level.amoeba_content :
+        i == EL_WALL_EMERALD ? EL_EMERALD :
+        i == EL_WALL_DIAMOND ? EL_DIAMOND :
+        i == EL_WALL_BD_DIAMOND ? EL_BD_DIAMOND :
+        i == EL_WALL_EMERALD_YELLOW ? EL_EMERALD_YELLOW :
+        i == EL_WALL_EMERALD_RED ? EL_EMERALD_RED :
+        i == EL_WALL_EMERALD_PURPLE ? EL_EMERALD_PURPLE :
+        i == EL_WALL_PEARL ? EL_PEARL :
+        i == EL_WALL_CRYSTAL ? EL_CRYSTAL :
+        EL_EMPTY);
+    }
+  }
+
+  /* ---------- initialize recursion detection ------------------------------ */
+  recursion_loop_depth = 0;
+  recursion_loop_detected = FALSE;
+  recursion_loop_element = EL_UNDEFINED;
+
+  /* ---------- initialize graphics engine ---------------------------------- */
+  game.scroll_delay_value =
+    (game.forced_scroll_delay_value != -1 ? game.forced_scroll_delay_value :
+     setup.scroll_delay                   ? setup.scroll_delay_value       : 0);
+  game.scroll_delay_value =
+    MIN(MAX(MIN_SCROLL_DELAY, game.scroll_delay_value), MAX_SCROLL_DELAY);
+}
+
+int get_num_special_action(int element, int action_first, int action_last)
+{
+  int num_special_action = 0;
+  int i, j;
+
+  for (i = action_first; i <= action_last; i++)
+  {
+    boolean found = FALSE;
+
+    for (j = 0; j < NUM_DIRECTIONS; j++)
+      if (el_act_dir2img(element, i, j) !=
+         el_act_dir2img(element, ACTION_DEFAULT, j))
+       found = TRUE;
+
+    if (found)
+      num_special_action++;
+    else
+      break;
+  }
+
+  return num_special_action;
 }
 
 
@@ -1482,9 +2921,15 @@ void InitGame()
   boolean emulate_bd = TRUE;   /* unless non-BOULDERDASH elements found */
   boolean emulate_sb = TRUE;   /* unless non-SOKOBAN     elements found */
   boolean emulate_sp = TRUE;   /* unless non-SUPAPLEX    elements found */
-  int i, j, k, x, y;
+#if 0
+  boolean do_fading = (game_status == GAME_MODE_MAIN);
+#endif
+  int i, j, x, y;
+
+  game_status = GAME_MODE_PLAYING;
 
   InitGameEngine();
+  InitGameControlValues();
 
   /* don't play tapes over network */
   network_playing = (options.network && !tape.playing);
@@ -1499,12 +2944,15 @@ void InitGame()
 
     player->present = FALSE;
     player->active = FALSE;
+    player->killed = FALSE;
 
     player->action = 0;
     player->effective_action = 0;
     player->programmed_action = 0;
 
     player->score = 0;
+    player->score_final = 0;
+
     player->gems_still_needed = level.gems_needed;
     player->sokobanfields_still_needed = 0;
     player->lights_still_needed = 0;
@@ -1513,31 +2961,40 @@ void InitGame()
     for (j = 0; j < MAX_NUM_KEYS; j++)
       player->key[j] = FALSE;
 
+    player->num_white_keys = 0;
+
     player->dynabomb_count = 0;
     player->dynabomb_size = 1;
     player->dynabombs_left = 0;
     player->dynabomb_xl = FALSE;
 
-    player->MovDir = MV_NO_MOVING;
+    player->MovDir = MV_NONE;
     player->MovPos = 0;
     player->GfxPos = 0;
-    player->GfxDir = MV_NO_MOVING;
+    player->GfxDir = MV_NONE;
     player->GfxAction = ACTION_DEFAULT;
     player->Frame = 0;
     player->StepFrame = 0;
 
-    player->use_murphy_graphic = FALSE;
+    player->use_murphy = FALSE;
+    player->artwork_element =
+      (level.use_artwork_element[i] ? level.artwork_element[i] :
+       player->element_nr);
 
     player->block_last_field = FALSE;  /* initialized in InitPlayerField() */
     player->block_delay_adjustment = 0;        /* initialized in InitPlayerField() */
 
+    player->gravity = level.initial_player_gravity[i];
+
     player->can_fall_into_acid = CAN_MOVE_INTO_ACID(player->element_nr);
 
     player->actual_frame_counter = 0;
 
     player->step_counter = 0;
 
-    player->last_move_dir = MV_NO_MOVING;
+    player->last_move_dir = MV_NONE;
+
+    player->is_active = FALSE;
 
     player->is_waiting = FALSE;
     player->is_moving = FALSE;
@@ -1548,6 +3005,7 @@ void InitGame()
     player->is_pushing = FALSE;
     player->is_switching = FALSE;
     player->is_dropping = FALSE;
+    player->is_dropping_pressed = FALSE;
 
     player->is_bored = FALSE;
     player->is_sleeping = FALSE;
@@ -1558,71 +3016,32 @@ void InitGame()
     player->anim_delay_counter = 0;
     player->post_delay_counter = 0;
 
+    player->dir_waiting = MV_NONE;
     player->action_waiting = ACTION_DEFAULT;
     player->last_action_waiting = ACTION_DEFAULT;
     player->special_action_bored = ACTION_DEFAULT;
     player->special_action_sleeping = ACTION_DEFAULT;
 
-    player->num_special_action_bored = 0;
-    player->num_special_action_sleeping = 0;
-
-    /* determine number of special actions for bored and sleeping animation */
-    for (j = ACTION_BORING_1; j <= ACTION_BORING_LAST; j++)
-    {
-      boolean found = FALSE;
-
-      for (k = 0; k < NUM_DIRECTIONS; k++)
-       if (el_act_dir2img(player->element_nr, j, k) !=
-           el_act_dir2img(player->element_nr, ACTION_DEFAULT, k))
-         found = TRUE;
-
-      if (found)
-       player->num_special_action_bored++;
-      else
-       break;
-    }
-    for (j = ACTION_SLEEPING_1; j <= ACTION_SLEEPING_LAST; j++)
-    {
-      boolean found = FALSE;
-
-      for (k = 0; k < NUM_DIRECTIONS; k++)
-       if (el_act_dir2img(player->element_nr, j, k) !=
-           el_act_dir2img(player->element_nr, ACTION_DEFAULT, k))
-         found = TRUE;
-
-      if (found)
-       player->num_special_action_sleeping++;
-      else
-       break;
-    }
-
     player->switch_x = -1;
     player->switch_y = -1;
 
-#if USE_DROP_BUGFIX
     player->drop_x = -1;
     player->drop_y = -1;
-#endif
 
     player->show_envelope = 0;
 
-    player->move_delay       = game.initial_move_delay;
-    player->move_delay_value = game.initial_move_delay_value;
+    SetPlayerMoveSpeed(player, level.initial_player_stepsize[i], TRUE);
 
-    player->move_delay_reset_counter = 0;
-
-#if USE_NEW_PUSH_DELAY
     player->push_delay       = -1;     /* initialized when pushing starts */
     player->push_delay_value = game.initial_push_delay_value;
-#else
-    player->push_delay       = 0;
-    player->push_delay_value = game.initial_push_delay_value;
-#endif
 
     player->drop_delay = 0;
+    player->drop_pressed_delay = 0;
 
-    player->last_jx = player->last_jy = 0;
-    player->jx = player->jy = 0;
+    player->last_jx = -1;
+    player->last_jy = -1;
+    player->jx = -1;
+    player->jy = -1;
 
     player->shield_normal_time_left = 0;
     player->shield_deadly_time_left = 0;
@@ -1635,6 +3054,12 @@ void InitGame()
 
     player->LevelSolved = FALSE;
     player->GameOver = FALSE;
+
+    player->LevelSolved_GameWon = FALSE;
+    player->LevelSolved_GameEnd = FALSE;
+    player->LevelSolved_PanelOff = FALSE;
+    player->LevelSolved_SaveTape = FALSE;
+    player->LevelSolved_SaveScore = FALSE;
   }
 
   network_player_action_received = FALSE;
@@ -1642,7 +3067,7 @@ void InitGame()
 #if defined(NETWORK_AVALIABLE)
   /* initial null action */
   if (network_playing)
-    SendToServer_MovePlayer(MV_NO_MOVING);
+    SendToServer_MovePlayer(MV_NONE);
 #endif
 
   ZX = ZY = -1;
@@ -1654,7 +3079,7 @@ void InitGame()
   TimeLeft = level.time;
   TapeTime = 0;
 
-  ScreenMovDir = MV_NO_MOVING;
+  ScreenMovDir = MV_NONE;
   ScreenMovPos = 0;
   ScreenGfxPos = 0;
 
@@ -1668,75 +3093,127 @@ void InitGame()
   game.light_time_left = 0;
   game.timegate_time_left = 0;
   game.switchgate_pos = 0;
-  game.balloon_dir = MV_NO_MOVING;
-  game.gravity = level.initial_gravity;
+  game.wind_direction = level.wind_direction_initial;
+
+#if !USE_PLAYER_GRAVITY
+  game.gravity = FALSE;
   game.explosions_delayed = TRUE;
+#endif
+
+  game.lenses_time_left = 0;
+  game.magnify_time_left = 0;
+
+  game.ball_state = level.ball_state_initial;
+  game.ball_content_nr = 0;
 
   game.envelope_active = FALSE;
 
+  /* set focus to local player for network games, else to all players */
+  game.centered_player_nr = (network_playing ? local_player->index_nr : -1);
+  game.centered_player_nr_next = game.centered_player_nr;
+  game.set_centered_player = FALSE;
+
+  if (network_playing && tape.recording)
+  {
+    /* store client dependent player focus when recording network games */
+    tape.centered_player_nr_next = game.centered_player_nr_next;
+    tape.set_centered_player = TRUE;
+  }
+
   for (i = 0; i < NUM_BELTS; i++)
   {
-    game.belt_dir[i] = MV_NO_MOVING;
+    game.belt_dir[i] = MV_NONE;
     game.belt_dir_nr[i] = 3;           /* not moving, next moving left */
   }
 
   for (i = 0; i < MAX_NUM_AMOEBA; i++)
     AmoebaCnt[i] = AmoebaCnt2[i] = 0;
 
-  for (x = 0; x < lev_fieldx; x++)
+  SCAN_PLAYFIELD(x, y)
   {
-    for (y = 0; y < lev_fieldy; y++)
-    {
-      Feld[x][y] = level.field[x][y];
-      MovPos[x][y] = MovDir[x][y] = MovDelay[x][y] = 0;
-      ChangeDelay[x][y] = 0;
-      ChangePage[x][y] = -1;
-      Store[x][y] = Store2[x][y] = StorePlayer[x][y] = Back[x][y] = 0;
-      AmoebaNr[x][y] = 0;
-      WasJustMoving[x][y] = 0;
-      WasJustFalling[x][y] = 0;
-      CheckCollision[x][y] = 0;
-      Stop[x][y] = FALSE;
-      Pushed[x][y] = FALSE;
+    Feld[x][y] = level.field[x][y];
+    MovPos[x][y] = MovDir[x][y] = MovDelay[x][y] = 0;
+    ChangeDelay[x][y] = 0;
+    ChangePage[x][y] = -1;
+#if USE_NEW_CUSTOM_VALUE
+    CustomValue[x][y] = 0;             /* initialized in InitField() */
+#endif
+    Store[x][y] = Store2[x][y] = StorePlayer[x][y] = Back[x][y] = 0;
+    AmoebaNr[x][y] = 0;
+    WasJustMoving[x][y] = 0;
+    WasJustFalling[x][y] = 0;
+    CheckCollision[x][y] = 0;
+    CheckImpact[x][y] = 0;
+    Stop[x][y] = FALSE;
+    Pushed[x][y] = FALSE;
 
-      Changed[x][y] = FALSE;
-      ChangeEvent[x][y] = -1;
+    ChangeCount[x][y] = 0;
+    ChangeEvent[x][y] = -1;
 
-      ExplodePhase[x][y] = 0;
-      ExplodeDelay[x][y] = 0;
-      ExplodeField[x][y] = EX_TYPE_NONE;
+    ExplodePhase[x][y] = 0;
+    ExplodeDelay[x][y] = 0;
+    ExplodeField[x][y] = EX_TYPE_NONE;
 
-      RunnerVisit[x][y] = 0;
-      PlayerVisit[x][y] = 0;
+    RunnerVisit[x][y] = 0;
+    PlayerVisit[x][y] = 0;
 
-      GfxFrame[x][y] = 0;
-      GfxRandom[x][y] = INIT_GFX_RANDOM();
-      GfxElement[x][y] = EL_UNDEFINED;
-      GfxAction[x][y] = ACTION_DEFAULT;
-      GfxDir[x][y] = MV_NO_MOVING;
-    }
+    GfxFrame[x][y] = 0;
+    GfxRandom[x][y] = INIT_GFX_RANDOM();
+    GfxElement[x][y] = EL_UNDEFINED;
+    GfxAction[x][y] = ACTION_DEFAULT;
+    GfxDir[x][y] = MV_NONE;
   }
 
-  for (y = 0; y < lev_fieldy; y++)
+  SCAN_PLAYFIELD(x, y)
+  {
+    if (emulate_bd && !IS_BD_ELEMENT(Feld[x][y]))
+      emulate_bd = FALSE;
+    if (emulate_sb && !IS_SB_ELEMENT(Feld[x][y]))
+      emulate_sb = FALSE;
+    if (emulate_sp && !IS_SP_ELEMENT(Feld[x][y]))
+      emulate_sp = FALSE;
+
+    InitField(x, y, TRUE);
+  }
+
+  InitBeltMovement();
+
+  for (i = 0; i < MAX_PLAYERS; i++)
   {
-    for (x = 0; x < lev_fieldx; x++)
+    struct PlayerInfo *player = &stored_player[i];
+
+    /* set number of special actions for bored and sleeping animation */
+    player->num_special_action_bored =
+      get_num_special_action(player->artwork_element,
+                            ACTION_BORING_1, ACTION_BORING_LAST);
+    player->num_special_action_sleeping =
+      get_num_special_action(player->artwork_element,
+                            ACTION_SLEEPING_1, ACTION_SLEEPING_LAST);
+  }
+
+  game.emulation = (emulate_bd ? EMU_BOULDERDASH :
+                   emulate_sb ? EMU_SOKOBAN :
+                   emulate_sp ? EMU_SUPAPLEX : EMU_NONE);
+
+#if USE_NEW_ALL_SLIPPERY
+  /* initialize type of slippery elements */
+  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
+  {
+    if (!IS_CUSTOM_ELEMENT(i))
     {
-      if (emulate_bd && !IS_BD_ELEMENT(Feld[x][y]))
-       emulate_bd = FALSE;
-      if (emulate_sb && !IS_SB_ELEMENT(Feld[x][y]))
-       emulate_sb = FALSE;
-      if (emulate_sp && !IS_SP_ELEMENT(Feld[x][y]))
-       emulate_sp = FALSE;
+      /* default: elements slip down either to the left or right randomly */
+      element_info[i].slippery_type = SLIPPERY_ANY_RANDOM;
+
+      /* SP style elements prefer to slip down on the left side */
+      if (game.engine_version >= VERSION_IDENT(3,1,1,0) && IS_SP_ELEMENT(i))
+       element_info[i].slippery_type = SLIPPERY_ANY_LEFT_RIGHT;
 
-      InitField(x, y, TRUE);
+      /* BD style elements prefer to slip down on the left side */
+      if (game.emulation == EMU_BOULDERDASH)
+       element_info[i].slippery_type = SLIPPERY_ANY_LEFT_RIGHT;
     }
   }
-
-  InitBeltMovement();
-
-  game.emulation = (emulate_bd ? EMU_BOULDERDASH :
-                   emulate_sb ? EMU_SOKOBAN :
-                   emulate_sp ? EMU_SUPAPLEX : EMU_NONE);
+#endif
 
   /* initialize explosion and ignition delay */
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
@@ -1768,7 +3245,7 @@ void InitGame()
 
   /* correct non-moving belts to start moving left */
   for (i = 0; i < NUM_BELTS; i++)
-    if (game.belt_dir[i] == MV_NO_MOVING)
+    if (game.belt_dir[i] == MV_NONE)
       game.belt_dir_nr[i] = 3;         /* not moving, next moving left */
 
   /* check if any connected player was not found in playfield */
@@ -1792,14 +3269,10 @@ void InitGame()
          some_player->present = FALSE;
          some_player->active = FALSE;
 
-#if 0
-         player->element_nr = some_player->element_nr;
-#endif
+         player->artwork_element = some_player->artwork_element;
 
-#if USE_NEW_BLOCK_STYLE
          player->block_last_field       = some_player->block_last_field;
          player->block_delay_adjustment = some_player->block_delay_adjustment;
-#endif
 
          StorePlayer[jx][jy] = player->element_nr;
          player->jx = player->last_jx = jx;
@@ -1813,7 +3286,7 @@ void InitGame()
 
   if (tape.playing)
   {
-    /* when playing a tape, eliminate all players which do not participate */
+    /* when playing a tape, eliminate all players who do not participate */
 
     for (i = 0; i < MAX_PLAYERS; i++)
     {
@@ -1906,14 +3379,26 @@ void InitGame()
     int start_x = 0, start_y = 0;
     int found_rating = 0;
     int found_element = EL_UNDEFINED;
+    int player_nr = local_player->index_nr;
 
-    for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+    SCAN_PLAYFIELD(x, y)
     {
       int element = Feld[x][y];
       int content;
       int xx, yy;
       boolean is_player;
 
+      if (level.use_start_element[player_nr] &&
+         level.start_element[player_nr] == element &&
+         found_rating < 4)
+      {
+       start_x = x;
+       start_y = y;
+
+       found_rating = 4;
+       found_element = element;
+      }
+
       if (!IS_CUSTOM_ELEMENT(element))
        continue;
 
@@ -1921,10 +3406,12 @@ void InitGame()
       {
        for (i = 0; i < element_info[element].num_change_pages; i++)
        {
+         /* check for player created from custom element as single target */
          content = element_info[element].change_page[i].target_element;
          is_player = ELEM_IS_PLAYER(content);
 
-         if (is_player && (found_rating < 3 || element < found_element))
+         if (is_player && (found_rating < 3 ||
+                           (found_rating == 3 && element < found_element)))
          {
            start_x = x;
            start_y = y;
@@ -1937,10 +3424,12 @@ void InitGame()
 
       for (yy = 0; yy < 3; yy++) for (xx = 0; xx < 3; xx++)
       {
-       content = element_info[element].content[xx][yy];
+       /* check for player created from custom element as explosion content */
+       content = element_info[element].content.e[xx][yy];
        is_player = ELEM_IS_PLAYER(content);
 
-       if (is_player && (found_rating < 2 || element < found_element))
+       if (is_player && (found_rating < 2 ||
+                         (found_rating == 2 && element < found_element)))
        {
          start_x = x + xx - 1;
          start_y = y + yy - 1;
@@ -1954,10 +3443,14 @@ void InitGame()
 
        for (i = 0; i < element_info[element].num_change_pages; i++)
        {
-         content= element_info[element].change_page[i].target_content[xx][yy];
+         /* check for player created from custom element as extended target */
+         content =
+           element_info[element].change_page[i].target_content.e[xx][yy];
+
          is_player = ELEM_IS_PLAYER(content);
 
-         if (is_player && (found_rating < 1 || element < found_element))
+         if (is_player && (found_rating < 1 ||
+                           (found_rating == 1 && element < found_element)))
          {
            start_x = x + xx - 1;
            start_y = y + yy - 1;
@@ -1988,13 +3481,37 @@ void InitGame()
                local_player->jy - MIDPOSY);
   }
 
+  StopAnimation();
+
   if (!game.restart_level)
     CloseDoor(DOOR_CLOSE_1);
 
+#if 1
+  if (level_editor_test_game)
+    FadeSkipNextFadeIn();
+  else
+    FadeSetStartItem();
+#else
+  if (level_editor_test_game)
+    fading = fading_none;
+  else
+    fading = menu.destination;
+#endif
+
+#if 1
+  FadeOut(REDRAW_FIELD);
+#else
+  if (do_fading)
+    FadeOut(REDRAW_FIELD);
+#endif
+
   /* !!! FIX THIS (START) !!! */
   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
   {
     InitGameEngine_EM();
+
+    /* blit playfield from scroll buffer to normal back buffer for fading in */
+    BlitScreenToBitmap_EM(backbuffer);
   }
   else
   {
@@ -2005,14 +3522,23 @@ void InitGame()
     if (game.timegate_time_left == 0)
       CloseAllOpenTimegates();
 
+    /* blit playfield from scroll buffer to normal back buffer for fading in */
     if (setup.soft_scrolling)
       BlitBitmap(fieldbuffer, backbuffer, FX, FY, SXSIZE, SYSIZE, SX, SY);
 
     redraw_mask |= REDRAW_FROM_BACKBUFFER;
-    FadeToFront();
   }
   /* !!! FIX THIS (END) !!! */
 
+#if 1
+  FadeIn(REDRAW_FIELD);
+#else
+  if (do_fading)
+    FadeIn(REDRAW_FIELD);
+
+  BackToFront();
+#endif
+
   if (!game.restart_level)
   {
     /* copy default game door content to main double buffer */
@@ -2020,6 +3546,9 @@ void InitGame()
               DOOR_GFX_PAGEX5, DOOR_GFX_PAGEY1, DXSIZE, DYSIZE, DX, DY);
   }
 
+  SetPanelBackground();
+  SetDrawBackgroundMask(REDRAW_DOOR_1);
+
   DrawGameDoorValues();
 
   if (!game.restart_level)
@@ -2038,7 +3567,7 @@ void InitGame()
 
     OpenDoor(DOOR_OPEN_ALL);
 
-    PlaySoundStereo(SND_GAME_STARTING, SOUND_MIDDLE);
+    PlaySound(SND_GAME_STARTING);
 
     if (setup.sound_music)
       PlayLevelMusic();
@@ -2053,6 +3582,13 @@ void InitGame()
     }
   }
 
+#if 1
+  UnmapAllGadgets();
+
+  MapGameButtons();
+  MapTapeButtons();
+#endif
+
   game.restart_level = FALSE;
 }
 
@@ -2082,7 +3618,7 @@ void InitMovDir(int x, int y)
     { MV_LEFT,  MV_RIGHT, MV_UP, MV_DOWN }
   };
 
-  switch(element)
+  switch (element)
   {
     case EL_BUG_RIGHT:
     case EL_BUG_UP:
@@ -2124,6 +3660,14 @@ void InitMovDir(int x, int y)
       MovDir[x][y] = direction[0][element - EL_PACMAN_RIGHT];
       break;
 
+    case EL_YAMYAM_LEFT:
+    case EL_YAMYAM_RIGHT:
+    case EL_YAMYAM_UP:
+    case EL_YAMYAM_DOWN:
+      Feld[x][y] = EL_YAMYAM;
+      MovDir[x][y] = direction[2][element - EL_YAMYAM_LEFT];
+      break;
+
     case EL_SP_SNIKSNAK:
       MovDir[x][y] = MV_UP;
       break;
@@ -2149,7 +3693,7 @@ void InitMovDir(int x, int y)
 
        if (move_direction_initial == MV_START_PREVIOUS)
        {
-         if (MovDir[x][y] != MV_NO_MOVING)
+         if (MovDir[x][y] != MV_NONE)
            return;
 
          move_direction_initial = MV_START_AUTOMATIC;
@@ -2255,106 +3799,229 @@ void InitAmoebaNr(int x, int y)
   AmoebaCnt2[group_nr]++;
 }
 
+static void PlayerWins(struct PlayerInfo *player)
+{
+  player->LevelSolved = TRUE;
+  player->GameOver = TRUE;
+
+  player->score_final = (level.game_engine_type == GAME_ENGINE_TYPE_EM ?
+                        level.native_em_level->lev->score : player->score);
+}
+
 void GameWon()
 {
-  int hi_pos;
-  boolean raise_level = FALSE;
+  static int time, time_final;
+  static int score, score_final;
+  static int game_over_delay_1 = 0;
+  static int game_over_delay_2 = 0;
+  int game_over_delay_value_1 = 50;
+  int game_over_delay_value_2 = 50;
 
-  if (local_player->MovPos)
-    return;
+  if (!local_player->LevelSolved_GameWon)
+  {
+    int i;
 
-  if (tape.auto_play)          /* tape might already be stopped here */
-    tape.auto_play_level_solved = TRUE;
+    /* do not start end game actions before the player stops moving (to exit) */
+    if (local_player->MovPos)
+      return;
 
-  local_player->LevelSolved = FALSE;
+    local_player->LevelSolved_GameWon = TRUE;
+    local_player->LevelSolved_SaveTape = tape.recording;
+    local_player->LevelSolved_SaveScore = !tape.playing;
 
-  PlaySoundStereo(SND_GAME_WINNING, SOUND_MIDDLE);
+    if (tape.auto_play)                /* tape might already be stopped here */
+      tape.auto_play_level_solved = TRUE;
 
-  if (TimeLeft)
-  {
-    if (!tape.playing && setup.sound_loops)
-      PlaySoundExt(SND_GAME_LEVELTIME_BONUS, SOUND_MAX_VOLUME, SOUND_MIDDLE,
-                  SND_CTRL_PLAY_LOOP);
+#if 1
+    TapeStop();
+#endif
+
+    game_over_delay_1 = game_over_delay_value_1;
+    game_over_delay_2 = game_over_delay_value_2;
+
+    time = time_final = (level.time == 0 ? TimePlayed : TimeLeft);
+    score = score_final = local_player->score_final;
 
-    while (TimeLeft > 0)
+    if (TimeLeft > 0)
     {
-      if (!tape.playing && !setup.sound_loops)
-       PlaySoundStereo(SND_GAME_LEVELTIME_BONUS, SOUND_MIDDLE);
-      if (TimeLeft > 0 && !(TimeLeft % 10))
-       RaiseScore(level.score[SC_TIME_BONUS]);
-      if (TimeLeft > 100 && !(TimeLeft % 10))
-       TimeLeft -= 10;
-      else
-       TimeLeft--;
+      time_final = 0;
+      score_final += TimeLeft * level.score[SC_TIME_BONUS];
+    }
+    else if (level.time == 0 && TimePlayed < 999)
+    {
+      time_final = 999;
+      score_final += (999 - TimePlayed) * level.score[SC_TIME_BONUS];
+    }
 
-      DrawGameValue_Time(TimeLeft);
+    local_player->score_final = score_final;
 
-      BackToFront();
+    if (level_editor_test_game)
+    {
+      time = time_final;
+      score = score_final;
 
-      if (!tape.playing)
-       Delay(10);
-    }
+#if 1
+      game_control_value[GAME_CONTROL_TIME] = time;
+      game_control_value[GAME_CONTROL_SCORE] = score;
 
-    if (!tape.playing && setup.sound_loops)
-      StopSound(SND_GAME_LEVELTIME_BONUS);
-  }
-  else if (level.time == 0)            /* level without time limit */
-  {
-    if (!tape.playing && setup.sound_loops)
-      PlaySoundExt(SND_GAME_LEVELTIME_BONUS, SOUND_MAX_VOLUME, SOUND_MIDDLE,
-                  SND_CTRL_PLAY_LOOP);
+      DisplayGameControlValues();
+#else
+      DrawGameValue_Time(time);
+      DrawGameValue_Score(score);
+#endif
+    }
 
-    while (TimePlayed < 999)
+    if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
     {
-      if (!tape.playing && !setup.sound_loops)
-       PlaySoundStereo(SND_GAME_LEVELTIME_BONUS, SOUND_MIDDLE);
-      if (TimePlayed < 999 && !(TimePlayed % 10))
-       RaiseScore(level.score[SC_TIME_BONUS]);
-      if (TimePlayed < 900 && !(TimePlayed % 10))
-       TimePlayed += 10;
-      else
-       TimePlayed++;
+      if (ExitX >= 0 && ExitY >= 0)    /* local player has left the level */
+      {
+       /* close exit door after last player */
+       if ((AllPlayersGone &&
+            (Feld[ExitX][ExitY] == EL_EXIT_OPEN ||
+             Feld[ExitX][ExitY] == EL_SP_EXIT_OPEN ||
+             Feld[ExitX][ExitY] == EL_STEEL_EXIT_OPEN)) ||
+           Feld[ExitX][ExitY] == EL_EM_EXIT_OPEN ||
+           Feld[ExitX][ExitY] == EL_EM_STEEL_EXIT_OPEN)
+       {
+         int element = Feld[ExitX][ExitY];
+
+#if 0
+         if (element == EL_EM_EXIT_OPEN ||
+             element == EL_EM_STEEL_EXIT_OPEN)
+         {
+           Bang(ExitX, ExitY);
+         }
+         else
+#endif
+         {
+           Feld[ExitX][ExitY] =
+             (element == EL_EXIT_OPEN          ? EL_EXIT_CLOSING :
+              element == EL_EM_EXIT_OPEN       ? EL_EM_EXIT_CLOSING :
+              element == EL_SP_EXIT_OPEN       ? EL_SP_EXIT_CLOSING:
+              element == EL_STEEL_EXIT_OPEN    ? EL_STEEL_EXIT_CLOSING:
+              EL_EM_STEEL_EXIT_CLOSING);
+
+           PlayLevelSoundElementAction(ExitX, ExitY, element, ACTION_CLOSING);
+         }
+       }
 
-      DrawGameValue_Time(TimePlayed);
+       /* player disappears */
+       DrawLevelField(ExitX, ExitY);
+      }
 
-      BackToFront();
+      for (i = 0; i < MAX_PLAYERS; i++)
+      {
+       struct PlayerInfo *player = &stored_player[i];
+
+       if (player->present)
+       {
+         RemovePlayer(player);
 
-      if (!tape.playing)
-       Delay(10);
+         /* player disappears */
+         DrawLevelField(player->jx, player->jy);
+       }
+      }
     }
 
-    if (!tape.playing && setup.sound_loops)
-      StopSound(SND_GAME_LEVELTIME_BONUS);
+    PlaySound(SND_GAME_WINNING);
+  }
+
+  if (game_over_delay_1 > 0)
+  {
+    game_over_delay_1--;
+
+    return;
   }
 
-  /* close exit door after last player */
-  if (AllPlayersGone && ExitX >= 0 && ExitY >= 0 &&
-      (Feld[ExitX][ExitY] == EL_EXIT_OPEN ||
-       Feld[ExitX][ExitY] == EL_SP_EXIT_OPEN))
+  if (time != time_final)
   {
-    int element = Feld[ExitX][ExitY];
+    int time_to_go = ABS(time_final - time);
+    int time_count_dir = (time < time_final ? +1 : -1);
+    int time_count_steps = (time_to_go > 100 && time_to_go % 10 == 0 ? 10 : 1);
+
+    time  += time_count_steps * time_count_dir;
+    score += time_count_steps * level.score[SC_TIME_BONUS];
 
-    Feld[ExitX][ExitY] = (element == EL_EXIT_OPEN ? EL_EXIT_CLOSING :
-                         EL_SP_EXIT_CLOSING);
+#if 1
+    game_control_value[GAME_CONTROL_TIME] = time;
+    game_control_value[GAME_CONTROL_SCORE] = score;
+
+    DisplayGameControlValues();
+#else
+    DrawGameValue_Time(time);
+    DrawGameValue_Score(score);
+#endif
 
-    PlayLevelSoundElementAction(ExitX, ExitY, element, ACTION_CLOSING);
+    if (time == time_final)
+      StopSound(SND_GAME_LEVELTIME_BONUS);
+    else if (setup.sound_loops)
+      PlaySoundLoop(SND_GAME_LEVELTIME_BONUS);
+    else
+      PlaySound(SND_GAME_LEVELTIME_BONUS);
+
+    return;
   }
 
-  /* Hero disappears */
-  if (ExitX >= 0 && ExitY >= 0)
-    DrawLevelField(ExitX, ExitY);
+  local_player->LevelSolved_PanelOff = TRUE;
 
-  BackToFront();
+  if (game_over_delay_2 > 0)
+  {
+    game_over_delay_2--;
 
-  if (tape.playing)
     return;
+  }
+
+#if 1
+  GameEnd();
+#endif
+}
+
+void GameEnd()
+{
+  int hi_pos;
+  boolean raise_level = FALSE;
+
+  local_player->LevelSolved_GameEnd = TRUE;
 
   CloseDoor(DOOR_CLOSE_1);
 
-  if (tape.recording)
+  if (local_player->LevelSolved_SaveTape)
   {
+#if 0
     TapeStop();
-    SaveTape(tape.level_nr);           /* Ask to save tape */
+#endif
+
+#if 1
+    SaveTapeChecked(tape.level_nr);    /* ask to save tape */
+#else
+    SaveTape(tape.level_nr);           /* ask to save tape */
+#endif
+  }
+
+  if (level_editor_test_game)
+  {
+    game_status = GAME_MODE_MAIN;
+
+#if 1
+    DrawAndFadeInMainMenu(REDRAW_FIELD);
+#else
+    DrawMainMenu();
+#endif
+
+    return;
+  }
+
+  if (!local_player->LevelSolved_SaveScore)
+  {
+#if 1
+    FadeOut(REDRAW_FIELD);
+#endif
+
+    game_status = GAME_MODE_MAIN;
+
+    DrawAndFadeInMainMenu(REDRAW_FIELD);
+
+    return;
   }
 
   if (level_nr == leveldir_current->handicap_level)
@@ -2363,15 +4030,15 @@ void GameWon()
     SaveLevelSetup_SeriesInfo();
   }
 
-  if (level_editor_test_game)
-    local_player->score = -1;  /* no highscore when playing from editor */
-  else if (level_nr < leveldir_current->last_level)
-    raise_level = TRUE;                /* advance to next level */
+  if (level_nr < leveldir_current->last_level)
+    raise_level = TRUE;                        /* advance to next level */
 
   if ((hi_pos = NewHiScore()) >= 0) 
   {
     game_status = GAME_MODE_SCORES;
+
     DrawHallOfFame(hi_pos);
+
     if (raise_level)
     {
       level_nr++;
@@ -2380,16 +4047,20 @@ void GameWon()
   }
   else
   {
+#if 1
+    FadeOut(REDRAW_FIELD);
+#endif
+
     game_status = GAME_MODE_MAIN;
+
     if (raise_level)
     {
       level_nr++;
       TapeErase();
     }
-    DrawMainMenu();
-  }
 
-  BackToFront();
+    DrawAndFadeInMainMenu(REDRAW_FIELD);
+  }
 }
 
 int NewHiScore()
@@ -2399,13 +4070,13 @@ int NewHiScore()
 
   LoadScore(level_nr);
 
-  if (strcmp(setup.player_name, EMPTY_PLAYER_NAME) == 0 ||
-      local_player->score < highscore[MAX_SCORE_ENTRIES - 1].Score) 
+  if (strEqual(setup.player_name, EMPTY_PLAYER_NAME) ||
+      local_player->score_final < highscore[MAX_SCORE_ENTRIES - 1].Score) 
     return -1;
 
   for (k = 0; k < MAX_SCORE_ENTRIES; k++) 
   {
-    if (local_player->score > highscore[k].Score)
+    if (local_player->score_final > highscore[k].Score)
     {
       /* player has made it to the hall of fame */
 
@@ -2415,7 +4086,7 @@ int NewHiScore()
 
 #ifdef ONE_PER_NAME
        for (l = k; l < MAX_SCORE_ENTRIES; l++)
-         if (!strcmp(setup.player_name, highscore[l].Name))
+         if (strEqual(setup.player_name, highscore[l].Name))
            m = l;
        if (m == k)     /* player's new highscore overwrites his old one */
          goto put_into_list;
@@ -2433,7 +4104,7 @@ int NewHiScore()
 #endif
       strncpy(highscore[k].Name, setup.player_name, MAX_PLAYER_NAME_LEN);
       highscore[k].Name[MAX_PLAYER_NAME_LEN] = '\0';
-      highscore[k].Score = local_player->score; 
+      highscore[k].Score = local_player->score_final
       position = k;
       break;
     }
@@ -2452,10 +4123,9 @@ int NewHiScore()
   return position;
 }
 
-inline static int getElementMoveStepsize(int x, int y)
+inline static int getElementMoveStepsizeExt(int x, int y, int direction)
 {
   int element = Feld[x][y];
-  int direction = MovDir[x][y];
   int dx = (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
   int dy = (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
   int horiz_move = (dx != 0);
@@ -2465,24 +4135,21 @@ inline static int getElementMoveStepsize(int x, int y)
   /* special values for move stepsize for spring and things on conveyor belt */
   if (horiz_move)
   {
-#if 0
-    if (element == EL_SPRING)
-      step = sign * MOVE_STEPSIZE_NORMAL * 2;
-    else if (CAN_FALL(element) && !CAN_MOVE(element) &&
-            y < lev_fieldy - 1 && IS_BELT_ACTIVE(Feld[x][y + 1]))
-      step = sign * MOVE_STEPSIZE_NORMAL / 2;
-#else
     if (CAN_FALL(element) &&
        y < lev_fieldy - 1 && IS_BELT_ACTIVE(Feld[x][y + 1]))
       step = sign * MOVE_STEPSIZE_NORMAL / 2;
     else if (element == EL_SPRING)
       step = sign * MOVE_STEPSIZE_NORMAL * 2;
-#endif
   }
 
   return step;
 }
 
+inline static int getElementMoveStepsize(int x, int y)
+{
+  return getElementMoveStepsizeExt(x, y, MovDir[x][y]);
+}
+
 void InitPlayerGfxAnimation(struct PlayerInfo *player, int action, int dir)
 {
   if (player->GfxAction != action || player->GfxDir != dir)
@@ -2499,16 +4166,41 @@ void InitPlayerGfxAnimation(struct PlayerInfo *player, int action, int dir)
   }
 }
 
-static void ResetRandomAnimationValue(int x, int y)
+#if USE_GFX_RESET_GFX_ANIMATION
+static void ResetGfxFrame(int x, int y, boolean redraw)
 {
-  GfxRandom[x][y] = INIT_GFX_RANDOM();
+  int element = Feld[x][y];
+  int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+  int last_gfx_frame = GfxFrame[x][y];
+
+  if (graphic_info[graphic].anim_global_sync)
+    GfxFrame[x][y] = FrameCounter;
+  else if (ANIM_MODE(graphic) == ANIM_CE_VALUE)
+    GfxFrame[x][y] = CustomValue[x][y];
+  else if (ANIM_MODE(graphic) == ANIM_CE_SCORE)
+    GfxFrame[x][y] = element_info[element].collect_score;
+  else if (ANIM_MODE(graphic) == ANIM_CE_DELAY)
+    GfxFrame[x][y] = ChangeDelay[x][y];
+
+  if (redraw && GfxFrame[x][y] != last_gfx_frame)
+    DrawLevelGraphicAnimation(x, y, graphic);
 }
+#endif
 
 static void ResetGfxAnimation(int x, int y)
 {
-  GfxFrame[x][y] = 0;
   GfxAction[x][y] = ACTION_DEFAULT;
   GfxDir[x][y] = MovDir[x][y];
+  GfxFrame[x][y] = 0;
+
+#if USE_GFX_RESET_GFX_ANIMATION
+  ResetGfxFrame(x, y, FALSE);
+#endif
+}
+
+static void ResetRandomAnimationValue(int x, int y)
+{
+  GfxRandom[x][y] = INIT_GFX_RANDOM();
 }
 
 void InitMovingField(int x, int y, int direction)
@@ -2518,54 +4210,78 @@ void InitMovingField(int x, int y, int direction)
   int dy = (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
   int newx = x + dx;
   int newy = y + dy;
+  boolean is_moving_before, is_moving_after;
+#if 0
+  boolean continues_moving = (WasJustMoving[x][y] && direction == MovDir[x][y]);
+#endif
 
-  if (!WasJustMoving[x][y] || direction != MovDir[x][y])
-    ResetGfxAnimation(x, y);
+  /* check if element was/is moving or being moved before/after mode change */
+#if 1
+#if 1
+  is_moving_before = (WasJustMoving[x][y] != 0);
+#else
+  /* (!!! this does not work -- WasJustMoving is NOT a boolean value !!!) */
+  is_moving_before = WasJustMoving[x][y];
+#endif
+#else
+  is_moving_before = (getElementMoveStepsizeExt(x, y, MovDir[x][y]) != 0);
+#endif
+  is_moving_after  = (getElementMoveStepsizeExt(x, y, direction)    != 0);
 
-#if USE_CAN_MOVE_NOT_MOVING
+  /* reset animation only for moving elements which change direction of moving
+     or which just started or stopped moving
+     (else CEs with property "can move" / "not moving" are reset each frame) */
+#if USE_GFX_RESET_ONLY_WHEN_MOVING
+#if 1
+  if (is_moving_before != is_moving_after ||
+      direction != MovDir[x][y])
+    ResetGfxAnimation(x, y);
+#else
+  if ((is_moving_before || is_moving_after) && !continues_moving)
+    ResetGfxAnimation(x, y);
+#endif
+#else
+  if (!continues_moving)
+    ResetGfxAnimation(x, y);
+#endif
 
   MovDir[x][y] = direction;
   GfxDir[x][y] = direction;
+
+#if USE_GFX_RESET_ONLY_WHEN_MOVING
+  GfxAction[x][y] = (!is_moving_after ? ACTION_WAITING :
+                    direction == MV_DOWN && CAN_FALL(element) ?
+                    ACTION_FALLING : ACTION_MOVING);
+#else
   GfxAction[x][y] = (direction == MV_DOWN && CAN_FALL(element) ?
                     ACTION_FALLING : ACTION_MOVING);
+#endif
 
-  if (getElementMoveStepsize(x, y) != 0)       /* moving or being moved */
+  /* this is needed for CEs with property "can move" / "not moving" */
+
+  if (is_moving_after)
   {
     if (Feld[newx][newy] == EL_EMPTY)
       Feld[newx][newy] = EL_BLOCKED;
 
     MovDir[newx][newy] = MovDir[x][y];
+
+#if USE_NEW_CUSTOM_VALUE
+    CustomValue[newx][newy] = CustomValue[x][y];
+#endif
+
     GfxFrame[newx][newy] = GfxFrame[x][y];
     GfxRandom[newx][newy] = GfxRandom[x][y];
     GfxAction[newx][newy] = GfxAction[x][y];
     GfxDir[newx][newy] = GfxDir[x][y];
   }
-
-#else
-
-  MovDir[newx][newy] = MovDir[x][y] = direction;
-  GfxDir[x][y] = direction;
-
-  if (Feld[newx][newy] == EL_EMPTY)
-    Feld[newx][newy] = EL_BLOCKED;
-
-  if (direction == MV_DOWN && CAN_FALL(element))
-    GfxAction[x][y] = ACTION_FALLING;
-  else
-    GfxAction[x][y] = ACTION_MOVING;
-
-  GfxFrame[newx][newy] = GfxFrame[x][y];
-  GfxRandom[newx][newy] = GfxRandom[x][y];
-  GfxAction[newx][newy] = GfxAction[x][y];
-  GfxDir[newx][newy] = GfxDir[x][y];
-#endif
 }
 
 void Moving2Blocked(int x, int y, int *goes_to_x, int *goes_to_y)
 {
   int direction = MovDir[x][y];
-  int newx = x + (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
-  int newy = y + (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
+  int newx = x + (direction & MV_LEFT ? -1 : direction & MV_RIGHT ? +1 : 0);
+  int newy = y + (direction & MV_UP   ? -1 : direction & MV_DOWN  ? +1 : 0);
 
   *goes_to_x = newx;
   *goes_to_y = newy;
@@ -2635,6 +4351,10 @@ static void RemoveField(int x, int y)
   MovDir[x][y] = 0;
   MovDelay[x][y] = 0;
 
+#if USE_NEW_CUSTOM_VALUE
+  CustomValue[x][y] = 0;
+#endif
+
   AmoebaNr[x][y] = 0;
   ChangeDelay[x][y] = 0;
   ChangePage[x][y] = -1;
@@ -2646,7 +4366,7 @@ static void RemoveField(int x, int y)
 
   GfxElement[x][y] = EL_UNDEFINED;
   GfxAction[x][y] = ACTION_DEFAULT;
-  GfxDir[x][y] = MV_NO_MOVING;
+  GfxDir[x][y] = MV_NONE;
 }
 
 void RemoveMovingField(int x, int y)
@@ -2686,8 +4406,10 @@ void RemoveMovingField(int x, int y)
 
   if (element == EL_BLOCKED &&
       (Feld[oldx][oldy] == EL_QUICKSAND_EMPTYING ||
+       Feld[oldx][oldy] == EL_QUICKSAND_FAST_EMPTYING ||
        Feld[oldx][oldy] == EL_MAGIC_WALL_EMPTYING ||
        Feld[oldx][oldy] == EL_BD_MAGIC_WALL_EMPTYING ||
+       Feld[oldx][oldy] == EL_DC_MAGIC_WALL_EMPTYING ||
        Feld[oldx][oldy] == EL_AMOEBA_DROPPING))
     next_element = get_next_element(Feld[oldx][oldy]);
 
@@ -2745,41 +4467,120 @@ void CheckDynamite(int x, int y)
 
   StopLevelSoundActionIfLoop(x, y, ACTION_ACTIVE);
 
-  Bang(x, y);
+  Bang(x, y);
+}
+
+static void setMinimalPlayerBoundaries(int *sx1, int *sy1, int *sx2, int *sy2)
+{
+  boolean num_checked_players = 0;
+  int i;
+
+  for (i = 0; i < MAX_PLAYERS; i++)
+  {
+    if (stored_player[i].active)
+    {
+      int sx = stored_player[i].jx;
+      int sy = stored_player[i].jy;
+
+      if (num_checked_players == 0)
+      {
+       *sx1 = *sx2 = sx;
+       *sy1 = *sy2 = sy;
+      }
+      else
+      {
+       *sx1 = MIN(*sx1, sx);
+       *sy1 = MIN(*sy1, sy);
+       *sx2 = MAX(*sx2, sx);
+       *sy2 = MAX(*sy2, sy);
+      }
+
+      num_checked_players++;
+    }
+  }
+}
+
+static boolean checkIfAllPlayersFitToScreen_RND()
+{
+  int sx1 = 0, sy1 = 0, sx2 = 0, sy2 = 0;
+
+  setMinimalPlayerBoundaries(&sx1, &sy1, &sx2, &sy2);
+
+  return (sx2 - sx1 < SCR_FIELDX &&
+         sy2 - sy1 < SCR_FIELDY);
+}
+
+static void setScreenCenteredToAllPlayers(int *sx, int *sy)
+{
+  int sx1 = scroll_x, sy1 = scroll_y, sx2 = scroll_x, sy2 = scroll_y;
+
+  setMinimalPlayerBoundaries(&sx1, &sy1, &sx2, &sy2);
+
+  *sx = (sx1 + sx2) / 2;
+  *sy = (sy1 + sy2) / 2;
 }
 
-void DrawRelocatePlayer(struct PlayerInfo *player)
+void DrawRelocateScreen(int old_x, int old_y, int x, int y, int move_dir,
+                       boolean center_screen, boolean quick_relocation)
 {
   boolean ffwd_delay = (tape.playing && tape.fast_forward);
   boolean no_delay = (tape.warp_forward);
   int frame_delay_value = (ffwd_delay ? FfwdFrameDelay : GameFrameDelay);
   int wait_delay_value = (no_delay ? 0 : frame_delay_value);
-  int jx = player->jx;
-  int jy = player->jy;
 
-  if (level.instant_relocation)
+  if (quick_relocation)
   {
-    int offset = (setup.scroll_delay ? 3 : 0);
+    int offset = game.scroll_delay_value;
 
-    if (!IN_VIS_FIELD(SCREENX(jx), SCREENY(jy)))
+    if (!IN_VIS_FIELD(SCREENX(x), SCREENY(y)) || center_screen)
     {
-      scroll_x = (local_player->jx < SBX_Left  + MIDPOSX ? SBX_Left :
-                 local_player->jx > SBX_Right + MIDPOSX ? SBX_Right :
-                 local_player->jx - MIDPOSX);
+      if (!level.shifted_relocation || center_screen)
+      {
+       /* quick relocation (without scrolling), with centering of screen */
+
+       scroll_x = (x < SBX_Left  + MIDPOSX ? SBX_Left :
+                   x > SBX_Right + MIDPOSX ? SBX_Right :
+                   x - MIDPOSX);
+
+       scroll_y = (y < SBY_Upper + MIDPOSY ? SBY_Upper :
+                   y > SBY_Lower + MIDPOSY ? SBY_Lower :
+                   y - MIDPOSY);
+      }
+      else
+      {
+       /* quick relocation (without scrolling), but do not center screen */
 
-      scroll_y = (local_player->jy < SBY_Upper + MIDPOSY ? SBY_Upper :
-                 local_player->jy > SBY_Lower + MIDPOSY ? SBY_Lower :
-                 local_player->jy - MIDPOSY);
+       int center_scroll_x = (old_x < SBX_Left  + MIDPOSX ? SBX_Left :
+                              old_x > SBX_Right + MIDPOSX ? SBX_Right :
+                              old_x - MIDPOSX);
+
+       int center_scroll_y = (old_y < SBY_Upper + MIDPOSY ? SBY_Upper :
+                              old_y > SBY_Lower + MIDPOSY ? SBY_Lower :
+                              old_y - MIDPOSY);
+
+       int offset_x = x + (scroll_x - center_scroll_x);
+       int offset_y = y + (scroll_y - center_scroll_y);
+
+       scroll_x = (offset_x < SBX_Left  + MIDPOSX ? SBX_Left :
+                   offset_x > SBX_Right + MIDPOSX ? SBX_Right :
+                   offset_x - MIDPOSX);
+
+       scroll_y = (offset_y < SBY_Upper + MIDPOSY ? SBY_Upper :
+                   offset_y > SBY_Lower + MIDPOSY ? SBY_Lower :
+                   offset_y - MIDPOSY);
+      }
     }
     else
     {
-      if ((player->MovDir == MV_LEFT  && scroll_x > jx - MIDPOSX + offset) ||
-         (player->MovDir == MV_RIGHT && scroll_x < jx - MIDPOSX - offset))
-       scroll_x = jx - MIDPOSX + (scroll_x < jx-MIDPOSX ? -offset : +offset);
+      /* quick relocation (without scrolling), inside visible screen area */
+
+      if ((move_dir == MV_LEFT  && scroll_x > x - MIDPOSX + offset) ||
+         (move_dir == MV_RIGHT && scroll_x < x - MIDPOSX - offset))
+       scroll_x = x - MIDPOSX + (scroll_x < x - MIDPOSX ? -offset : +offset);
 
-      if ((player->MovDir == MV_UP  && scroll_y > jy - MIDPOSY + offset) ||
-         (player->MovDir == MV_DOWN && scroll_y < jy - MIDPOSY - offset))
-       scroll_y = jy - MIDPOSY + (scroll_y < jy-MIDPOSY ? -offset : +offset);
+      if ((move_dir == MV_UP   && scroll_y > y - MIDPOSY + offset) ||
+         (move_dir == MV_DOWN && scroll_y < y - MIDPOSY - offset))
+       scroll_y = y - MIDPOSY + (scroll_y < y - MIDPOSY ? -offset : +offset);
 
       /* don't scroll over playfield boundaries */
       if (scroll_x < SBX_Left || scroll_x > SBX_Right)
@@ -2794,23 +4595,65 @@ void DrawRelocatePlayer(struct PlayerInfo *player)
   }
   else
   {
-    int scroll_xx = -999, scroll_yy = -999;
+#if 1
+    int scroll_xx, scroll_yy;
+
+    if (!level.shifted_relocation || center_screen)
+    {
+      /* visible relocation (with scrolling), with centering of screen */
+
+      scroll_xx = (x < SBX_Left  + MIDPOSX ? SBX_Left :
+                  x > SBX_Right + MIDPOSX ? SBX_Right :
+                  x - MIDPOSX);
+
+      scroll_yy = (y < SBY_Upper + MIDPOSY ? SBY_Upper :
+                  y > SBY_Lower + MIDPOSY ? SBY_Lower :
+                  y - MIDPOSY);
+    }
+    else
+    {
+      /* visible relocation (with scrolling), but do not center screen */
+
+      int center_scroll_x = (old_x < SBX_Left  + MIDPOSX ? SBX_Left :
+                            old_x > SBX_Right + MIDPOSX ? SBX_Right :
+                            old_x - MIDPOSX);
+
+      int center_scroll_y = (old_y < SBY_Upper + MIDPOSY ? SBY_Upper :
+                            old_y > SBY_Lower + MIDPOSY ? SBY_Lower :
+                            old_y - MIDPOSY);
+
+      int offset_x = x + (scroll_x - center_scroll_x);
+      int offset_y = y + (scroll_y - center_scroll_y);
+
+      scroll_xx = (offset_x < SBX_Left  + MIDPOSX ? SBX_Left :
+                  offset_x > SBX_Right + MIDPOSX ? SBX_Right :
+                  offset_x - MIDPOSX);
+
+      scroll_yy = (offset_y < SBY_Upper + MIDPOSY ? SBY_Upper :
+                  offset_y > SBY_Lower + MIDPOSY ? SBY_Lower :
+                  offset_y - MIDPOSY);
+    }
+
+#else
+
+    /* visible relocation (with scrolling), with centering of screen */
+
+    int scroll_xx = (x < SBX_Left  + MIDPOSX ? SBX_Left :
+                    x > SBX_Right + MIDPOSX ? SBX_Right :
+                    x - MIDPOSX);
+
+    int scroll_yy = (y < SBY_Upper + MIDPOSY ? SBY_Upper :
+                    y > SBY_Lower + MIDPOSY ? SBY_Lower :
+                    y - MIDPOSY);
+#endif
 
     ScrollScreen(NULL, SCROLL_GO_ON);  /* scroll last frame to full tile */
 
-    while (scroll_xx != scroll_x || scroll_yy != scroll_y)
+    while (scroll_x != scroll_xx || scroll_y != scroll_yy)
     {
       int dx = 0, dy = 0;
       int fx = FX, fy = FY;
 
-      scroll_xx = (local_player->jx < SBX_Left  + MIDPOSX ? SBX_Left :
-                  local_player->jx > SBX_Right + MIDPOSX ? SBX_Right :
-                  local_player->jx - MIDPOSX);
-
-      scroll_yy = (local_player->jy < SBY_Upper + MIDPOSY ? SBY_Upper :
-                  local_player->jy > SBY_Lower + MIDPOSY ? SBY_Lower :
-                  local_player->jy - MIDPOSY);
-
       dx = (scroll_xx < scroll_x ? +1 : scroll_xx > scroll_x ? -1 : 0);
       dy = (scroll_yy < scroll_y ? +1 : scroll_yy > scroll_y ? -1 : 0);
 
@@ -2836,7 +4679,7 @@ void DrawRelocatePlayer(struct PlayerInfo *player)
       Delay(wait_delay_value);
     }
 
-    DrawPlayer(player);
+    DrawAllPlayers();
     BackToFront();
     Delay(wait_delay_value);
   }
@@ -2844,8 +4687,9 @@ void DrawRelocatePlayer(struct PlayerInfo *player)
 
 void RelocatePlayer(int jx, int jy, int el_player_raw)
 {
-  int el_player = GET_VALID_PLAYER_ELEMENT(el_player_raw);
-  struct PlayerInfo *player = &stored_player[el_player - EL_PLAYER_1];
+  int el_player = GET_PLAYER_ELEMENT(el_player_raw);
+  int player_nr = GET_PLAYER_NR(el_player);
+  struct PlayerInfo *player = &stored_player[player_nr];
   boolean ffwd_delay = (tape.playing && tape.fast_forward);
   boolean no_delay = (tape.warp_forward);
   int frame_delay_value = (ffwd_delay ? FfwdFrameDelay : GameFrameDelay);
@@ -2884,11 +4728,7 @@ void RelocatePlayer(int jx, int jy, int el_player_raw)
       ScrollPlayer(player, SCROLL_GO_ON);
       ScrollScreen(NULL, SCROLL_GO_ON);
 
-#if USE_NEW_MOVE_DELAY
       AdvanceFrameAndPlayerCounters(player->index_nr);
-#else
-      FrameCounter++;
-#endif
 
       DrawPlayer(player);
 
@@ -2920,18 +4760,18 @@ void RelocatePlayer(int jx, int jy, int el_player_raw)
     InitField(jx, jy, FALSE);
   }
 
-  if (player == local_player)  /* only visually relocate local player */
-    DrawRelocatePlayer(player);
+  /* only visually relocate centered player */
+  DrawRelocateScreen(old_jx, old_jy, player->jx, player->jy, player->MovDir,
+                    FALSE, level.instant_relocation);
 
-  TestIfHeroTouchesBadThing(jx, jy);
+  TestIfPlayerTouchesBadThing(jx, jy);
   TestIfPlayerTouchesCustomElement(jx, jy);
 
   if (IS_CUSTOM_ELEMENT(element))
     CheckElementChangeByPlayer(jx, jy, element, CE_ENTERED_BY_PLAYER,
                               player->index_bit, enter_side);
 
-  CheckTriggeredElementChangeByPlayer(jx, jy, element,
-                                     CE_PLAYER_ENTERS_X,
+  CheckTriggeredElementChangeByPlayer(jx, jy, element, CE_PLAYER_ENTERS_X,
                                      player->index_bit, enter_side);
 }
 
@@ -2953,6 +4793,7 @@ void Explode(int ex, int ey, int phase, int mode)
   if (phase == EX_PHASE_START)         /* initialize 'Store[][]' field */
   {
     int center_element = Feld[ex][ey];
+    int artwork_element, explosion_element;    /* set these values later */
 
 #if 0
     /* --- This is only really needed (and now handled) in "Impact()". --- */
@@ -2963,10 +4804,13 @@ void Explode(int ex, int ey, int phase, int mode)
       return;
 #endif
 
+#if 0
+    /* !!! at this place, the center element may be EL_BLOCKED !!! */
     if (mode == EX_TYPE_NORMAL ||
        mode == EX_TYPE_CENTER ||
        mode == EX_TYPE_CROSS)
-      PlayLevelSoundAction(ex, ey, ACTION_EXPLODING);
+      PlayLevelSoundElementAction(ex, ey, artwork_element, ACTION_EXPLODING);
+#endif
 
     /* remove things displayed in background while burning dynamite */
     if (Back[ex][ey] != EL_EMPTY && !IS_INDESTRUCTIBLE(Back[ex][ey]))
@@ -2980,7 +4824,31 @@ void Explode(int ex, int ey, int phase, int mode)
       Feld[ex][ey] = center_element;
     }
 
-    last_phase = element_info[center_element].explosion_delay + 1;
+    /* now "center_element" is finally determined -- set related values now */
+    artwork_element = center_element;          /* for custom player artwork */
+    explosion_element = center_element;                /* for custom player artwork */
+
+    if (IS_PLAYER(ex, ey))
+    {
+      int player_nr = GET_PLAYER_NR(StorePlayer[ex][ey]);
+
+      artwork_element = stored_player[player_nr].artwork_element;
+
+      if (level.use_explosion_element[player_nr])
+      {
+       explosion_element = level.explosion_element[player_nr];
+       artwork_element = explosion_element;
+      }
+    }
+
+#if 1
+    if (mode == EX_TYPE_NORMAL ||
+       mode == EX_TYPE_CENTER ||
+       mode == EX_TYPE_CROSS)
+      PlayLevelSoundElementAction(ex, ey, artwork_element, ACTION_EXPLODING);
+#endif
+
+    last_phase = element_info[explosion_element].explosion_delay + 1;
 
     for (y = ey - 1; y <= ey + 1; y++) for (x = ex - 1; x <= ex + 1; x++)
     {
@@ -3053,61 +4921,32 @@ void Explode(int ex, int ey, int phase, int mode)
 
       if (IS_PLAYER(ex, ey) && !PLAYER_EXPLOSION_PROTECTED(ex, ey))
       {
-       switch(StorePlayer[ex][ey])
-       {
-         case EL_PLAYER_2:
-           Store[x][y] = EL_PLAYER_IS_EXPLODING_2;
-           break;
-         case EL_PLAYER_3:
-           Store[x][y] = EL_PLAYER_IS_EXPLODING_3;
-           break;
-         case EL_PLAYER_4:
-           Store[x][y] = EL_PLAYER_IS_EXPLODING_4;
-           break;
-         case EL_PLAYER_1:
-         default:
-           Store[x][y] = EL_PLAYER_IS_EXPLODING_1;
-           break;
-       }
+       int player_nr = StorePlayer[ex][ey] - EL_PLAYER_1;
+
+       Store[x][y] = EL_PLAYER_IS_EXPLODING_1 + player_nr;
 
-       if (PLAYERINFO(ex, ey)->use_murphy_graphic)
+       if (PLAYERINFO(ex, ey)->use_murphy)
          Store[x][y] = EL_EMPTY;
       }
-      else if (center_element == EL_MOLE)
-       Store[x][y] = EL_EMERALD_RED;
-      else if (center_element == EL_PENGUIN)
-       Store[x][y] = EL_EMERALD_PURPLE;
-      else if (center_element == EL_BUG)
-       Store[x][y] = ((x == ex && y == ey) ? EL_DIAMOND : EL_EMERALD);
-      else if (center_element == EL_BD_BUTTERFLY)
-       Store[x][y] = EL_BD_DIAMOND;
-      else if (center_element == EL_SP_ELECTRON)
-       Store[x][y] = EL_SP_INFOTRON;
-      else if (center_element == EL_AMOEBA_TO_DIAMOND)
-       Store[x][y] = level.amoeba_content;
+
+      /* !!! check this case -- currently needed for rnd_rado_negundo_v,
+        !!! levels 015 018 019 020 021 022 023 026 027 028 !!! */
+      else if (ELEM_IS_PLAYER(center_element))
+       Store[x][y] = EL_EMPTY;
       else if (center_element == EL_YAMYAM)
-       Store[x][y] = level.yamyam_content[game.yamyam_content_nr][xx][yy];
-      else if (IS_CUSTOM_ELEMENT(center_element) &&
-              element_info[center_element].content[xx][yy] != EL_EMPTY)
-       Store[x][y] = element_info[center_element].content[xx][yy];
-      else if (element == EL_WALL_EMERALD)
-       Store[x][y] = EL_EMERALD;
-      else if (element == EL_WALL_DIAMOND)
-       Store[x][y] = EL_DIAMOND;
-      else if (element == EL_WALL_BD_DIAMOND)
-       Store[x][y] = EL_BD_DIAMOND;
-      else if (element == EL_WALL_EMERALD_YELLOW)
-       Store[x][y] = EL_EMERALD_YELLOW;
-      else if (element == EL_WALL_EMERALD_RED)
-       Store[x][y] = EL_EMERALD_RED;
-      else if (element == EL_WALL_EMERALD_PURPLE)
-       Store[x][y] = EL_EMERALD_PURPLE;
-      else if (element == EL_WALL_PEARL)
-       Store[x][y] = EL_PEARL;
-      else if (element == EL_WALL_CRYSTAL)
-       Store[x][y] = EL_CRYSTAL;
-      else if (IS_CUSTOM_ELEMENT(element) && !CAN_EXPLODE(element))
-       Store[x][y] = element_info[element].content[1][1];
+       Store[x][y] = level.yamyam_content[game.yamyam_content_nr].e[xx][yy];
+      else if (element_info[center_element].content.e[xx][yy] != EL_EMPTY)
+       Store[x][y] = element_info[center_element].content.e[xx][yy];
+#if 1
+      /* needed because EL_BD_BUTTERFLY is not defined as "CAN_EXPLODE"
+        (killing EL_BD_BUTTERFLY with dynamite would result in BD diamond
+        otherwise) -- FIX THIS !!! */
+      else if (!CAN_EXPLODE(element) && element != EL_BD_BUTTERFLY)
+       Store[x][y] = element_info[element].content.e[1][1];
+#else
+      else if (!CAN_EXPLODE(element))
+       Store[x][y] = element_info[element].content.e[1][1];
+#endif
       else
        Store[x][y] = EL_EMPTY;
 
@@ -3116,7 +4955,7 @@ void Explode(int ex, int ey, int phase, int mode)
        Store2[x][y] = element;
 
       Feld[x][y] = EL_EXPLOSION;
-      GfxElement[x][y] = center_element;
+      GfxElement[x][y] = artwork_element;
 
       ExplodePhase[x][y] = 1;
       ExplodeDelay[x][y] = last_phase;
@@ -3152,6 +4991,11 @@ void Explode(int ex, int ey, int phase, int mode)
 #endif
 #if 1
 
+#if 1
+  /* this can happen if the player leaves an explosion just in time */
+  if (GfxElement[x][y] == EL_UNDEFINED)
+    GfxElement[x][y] = EL_EMPTY;
+#else
   if (GfxElement[x][y] == EL_UNDEFINED)
   {
     printf("\n\n");
@@ -3161,6 +5005,8 @@ void Explode(int ex, int ey, int phase, int mode)
 
     GfxElement[x][y] = EL_EMPTY;
   }
+#endif
+
 #endif
 
   border_element = Store2[x][y];
@@ -3175,7 +5021,7 @@ void Explode(int ex, int ey, int phase, int mode)
     if (IS_PLAYER(x, y) && PLAYERINFO(x, y)->present &&
        !PLAYER_EXPLOSION_PROTECTED(x, y))
     {
-      KillHeroUnlessExplosionProtected(x, y);
+      KillPlayerUnlessExplosionProtected(x, y);
       border_explosion = TRUE;
     }
     else if (CAN_EXPLODE_BY_EXPLOSION(border_element))
@@ -3210,12 +5056,18 @@ void Explode(int ex, int ey, int phase, int mode)
     /* player can escape from explosions and might therefore be still alive */
     if (element >= EL_PLAYER_IS_EXPLODING_1 &&
        element <= EL_PLAYER_IS_EXPLODING_4)
-      Feld[x][y] = (stored_player[element - EL_PLAYER_IS_EXPLODING_1].active ?
-                   EL_EMPTY :
-                   element == EL_PLAYER_IS_EXPLODING_1 ? EL_EMERALD_YELLOW :
-                   element == EL_PLAYER_IS_EXPLODING_2 ? EL_EMERALD_RED :
-                   element == EL_PLAYER_IS_EXPLODING_3 ? EL_EMERALD :
-                   EL_EMERALD_PURPLE);
+    {
+      int player_nr = element - EL_PLAYER_IS_EXPLODING_1;
+      int explosion_element = EL_PLAYER_1 + player_nr;
+      int xx = MIN(MAX(0, x - stored_player[player_nr].jx + 1), 2);
+      int yy = MIN(MAX(0, y - stored_player[player_nr].jy + 1), 2);
+
+      if (level.use_explosion_element[player_nr])
+       explosion_element = level.explosion_element[player_nr];
+
+      Feld[x][y] = (stored_player[player_nr].active ? EL_EMPTY :
+                   element_info[explosion_element].content.e[xx][yy]);
+    }
 
     /* restore probably existing indestructible background element */
     if (Back[x][y] && IS_INDESTRUCTIBLE(Back[x][y]))
@@ -3223,10 +5075,14 @@ void Explode(int ex, int ey, int phase, int mode)
     Back[x][y] = 0;
 
     MovDir[x][y] = MovPos[x][y] = MovDelay[x][y] = 0;
-    GfxDir[x][y] = MV_NO_MOVING;
+    GfxDir[x][y] = MV_NONE;
     ChangeDelay[x][y] = 0;
     ChangePage[x][y] = -1;
 
+#if USE_NEW_CUSTOM_VALUE
+    CustomValue[x][y] = 0;
+#endif
+
     InitField_WithBug2(x, y, FALSE);
 
     DrawLevelField(x, y);
@@ -3319,16 +5175,27 @@ void DynaExplode(int ex, int ey)
 void Bang(int x, int y)
 {
   int element = MovingOrBlocked2Element(x, y);
+  int explosion_type = EX_TYPE_NORMAL;
 
   if (IS_PLAYER(x, y) && !PLAYER_EXPLOSION_PROTECTED(x, y))
   {
     struct PlayerInfo *player = PLAYERINFO(x, y);
 
-    element = Feld[x][y] = (player->use_murphy_graphic ? EL_SP_MURPHY :
+    element = Feld[x][y] = (player->use_murphy ? EL_SP_MURPHY :
                            player->element_nr);
+
+    if (level.use_explosion_element[player->index_nr])
+    {
+      int explosion_element = level.explosion_element[player->index_nr];
+
+      if (element_info[explosion_element].explosion_type == EXPLODES_CROSS)
+       explosion_type = EX_TYPE_CROSS;
+      else if (element_info[explosion_element].explosion_type == EXPLODES_1X1)
+       explosion_type = EX_TYPE_CENTER;
+    }
   }
 
-  switch(element)
+  switch (element)
   {
     case EL_BUG:
     case EL_SPACESHIP:
@@ -3340,8 +5207,8 @@ void Bang(int x, int y)
     case EL_PACMAN:
     case EL_MOLE:
       RaiseScoreElement(element);
-      Explode(x, y, EX_PHASE_START, EX_TYPE_NORMAL);
       break;
+
     case EL_DYNABOMB_PLAYER_1_ACTIVE:
     case EL_DYNABOMB_PLAYER_2_ACTIVE:
     case EL_DYNABOMB_PLAYER_3_ACTIVE:
@@ -3349,27 +5216,38 @@ void Bang(int x, int y)
     case EL_DYNABOMB_INCREASE_NUMBER:
     case EL_DYNABOMB_INCREASE_SIZE:
     case EL_DYNABOMB_INCREASE_POWER:
-      DynaExplode(x, y);
+      explosion_type = EX_TYPE_DYNA;
+      break;
+
+    case EL_DC_LANDMINE:
+#if 0
+    case EL_EM_EXIT_OPEN:
+    case EL_EM_STEEL_EXIT_OPEN:
+#endif
+      explosion_type = EX_TYPE_CENTER;
       break;
+
     case EL_PENGUIN:
     case EL_LAMP:
     case EL_LAMP_ACTIVE:
     case EL_AMOEBA_TO_DIAMOND:
-      if (IS_PLAYER(x, y))
-       Explode(x, y, EX_PHASE_START, EX_TYPE_NORMAL);
-      else
-       Explode(x, y, EX_PHASE_START, EX_TYPE_CENTER);
+      if (!IS_PLAYER(x, y))    /* penguin and player may be at same field */
+       explosion_type = EX_TYPE_CENTER;
       break;
+
     default:
       if (element_info[element].explosion_type == EXPLODES_CROSS)
-       Explode(x, y, EX_PHASE_START, EX_TYPE_CROSS);
+       explosion_type = EX_TYPE_CROSS;
       else if (element_info[element].explosion_type == EXPLODES_1X1)
-       Explode(x, y, EX_PHASE_START, EX_TYPE_CENTER);
-      else
-       Explode(x, y, EX_PHASE_START, EX_TYPE_NORMAL);
+       explosion_type = EX_TYPE_CENTER;
       break;
   }
 
+  if (explosion_type == EX_TYPE_DYNA)
+    DynaExplode(x, y);
+  else
+    Explode(x, y, EX_PHASE_START, explosion_type);
+
   CheckTriggeredElementChange(x, y, element, CE_EXPLOSION_OF_X);
 }
 
@@ -3424,25 +5302,22 @@ static void InitBeltMovement()
     }
   }
 
-  for (y = 0; y < lev_fieldy; y++)
+  SCAN_PLAYFIELD(x, y)
   {
-    for (x = 0; x < lev_fieldx; x++)
-    {
-      int element = Feld[x][y];
+    int element = Feld[x][y];
 
-      for (i = 0; i < NUM_BELTS; i++)
+    for (i = 0; i < NUM_BELTS; i++)
+    {
+      if (IS_BELT(element) && game.belt_dir[i] != MV_NONE)
       {
-       if (IS_BELT(element) && game.belt_dir[i] != MV_NO_MOVING)
-       {
-         int e_belt_nr = getBeltNrFromBeltElement(element);
-         int belt_nr = i;
+       int e_belt_nr = getBeltNrFromBeltElement(element);
+       int belt_nr = i;
 
-         if (e_belt_nr == belt_nr)
-         {
-           int belt_part = Feld[x][y] - belt_base_element[belt_nr];
+       if (e_belt_nr == belt_nr)
+       {
+         int belt_part = Feld[x][y] - belt_base_element[belt_nr];
 
-           Feld[x][y] = belt_base_active_element[belt_nr] + belt_part;
-         }
+         Feld[x][y] = belt_base_active_element[belt_nr] + belt_part;
        }
       }
     }
@@ -3475,9 +5350,9 @@ static void ToggleBeltSwitch(int x, int y)
   static int belt_move_dir[4] =
   {
     MV_LEFT,
-    MV_NO_MOVING,
+    MV_NONE,
     MV_RIGHT,
-    MV_NO_MOVING,
+    MV_NONE,
   };
 
   int element = Feld[x][y];
@@ -3507,45 +5382,42 @@ static void ToggleBeltSwitch(int x, int y)
       graphic_info[graphic].anim_mode |=  ANIM_REVERSE;
   }
 
-  for (yy = 0; yy < lev_fieldy; yy++)
+  SCAN_PLAYFIELD(xx, yy)
   {
-    for (xx = 0; xx < lev_fieldx; xx++)
+    int element = Feld[xx][yy];
+
+    if (IS_BELT_SWITCH(element))
     {
-      int element = Feld[xx][yy];
+      int e_belt_nr = getBeltNrFromBeltSwitchElement(element);
 
-      if (IS_BELT_SWITCH(element))
+      if (e_belt_nr == belt_nr)
       {
-       int e_belt_nr = getBeltNrFromBeltSwitchElement(element);
-
-       if (e_belt_nr == belt_nr)
-       {
-         Feld[xx][yy] = belt_base_switch_element[belt_nr] + belt_dir_nr;
-         DrawLevelField(xx, yy);
-       }
+       Feld[xx][yy] = belt_base_switch_element[belt_nr] + belt_dir_nr;
+       DrawLevelField(xx, yy);
       }
-      else if (IS_BELT(element) && belt_dir != MV_NO_MOVING)
-      {
-       int e_belt_nr = getBeltNrFromBeltElement(element);
+    }
+    else if (IS_BELT(element) && belt_dir != MV_NONE)
+    {
+      int e_belt_nr = getBeltNrFromBeltElement(element);
 
-       if (e_belt_nr == belt_nr)
-       {
-         int belt_part = Feld[xx][yy] - belt_base_element[belt_nr];
+      if (e_belt_nr == belt_nr)
+      {
+       int belt_part = Feld[xx][yy] - belt_base_element[belt_nr];
 
-         Feld[xx][yy] = belt_base_active_element[belt_nr] + belt_part;
-         DrawLevelField(xx, yy);
-       }
+       Feld[xx][yy] = belt_base_active_element[belt_nr] + belt_part;
+       DrawLevelField(xx, yy);
       }
-      else if (IS_BELT_ACTIVE(element) && belt_dir == MV_NO_MOVING)
-      {
-       int e_belt_nr = getBeltNrFromBeltActiveElement(element);
+    }
+    else if (IS_BELT_ACTIVE(element) && belt_dir == MV_NONE)
+    {
+      int e_belt_nr = getBeltNrFromBeltActiveElement(element);
 
-       if (e_belt_nr == belt_nr)
-       {
-         int belt_part = Feld[xx][yy] - belt_base_active_element[belt_nr];
+      if (e_belt_nr == belt_nr)
+      {
+       int belt_part = Feld[xx][yy] - belt_base_active_element[belt_nr];
 
-         Feld[xx][yy] = belt_base_element[belt_nr] + belt_part;
-         DrawLevelField(xx, yy);
-       }
+       Feld[xx][yy] = belt_base_element[belt_nr] + belt_part;
+       DrawLevelField(xx, yy);
       }
     }
   }
@@ -3557,32 +5429,58 @@ static void ToggleSwitchgateSwitch(int x, int y)
 
   game.switchgate_pos = !game.switchgate_pos;
 
-  for (yy = 0; yy < lev_fieldy; yy++)
+  SCAN_PLAYFIELD(xx, yy)
   {
-    for (xx = 0; xx < lev_fieldx; xx++)
-    {
-      int element = Feld[xx][yy];
+    int element = Feld[xx][yy];
 
-      if (element == EL_SWITCHGATE_SWITCH_UP ||
-         element == EL_SWITCHGATE_SWITCH_DOWN)
-      {
-       Feld[xx][yy] = EL_SWITCHGATE_SWITCH_UP + game.switchgate_pos;
-       DrawLevelField(xx, yy);
-      }
-      else if (element == EL_SWITCHGATE_OPEN ||
-              element == EL_SWITCHGATE_OPENING)
-      {
-       Feld[xx][yy] = EL_SWITCHGATE_CLOSING;
+#if !USE_BOTH_SWITCHGATE_SWITCHES
+    if (element == EL_SWITCHGATE_SWITCH_UP ||
+       element == EL_SWITCHGATE_SWITCH_DOWN)
+    {
+      Feld[xx][yy] = EL_SWITCHGATE_SWITCH_UP + game.switchgate_pos;
+      DrawLevelField(xx, yy);
+    }
+    else if (element == EL_DC_SWITCHGATE_SWITCH_UP ||
+            element == EL_DC_SWITCHGATE_SWITCH_DOWN)
+    {
+      Feld[xx][yy] = EL_DC_SWITCHGATE_SWITCH_UP + game.switchgate_pos;
+      DrawLevelField(xx, yy);
+    }
+#else
+    if (element == EL_SWITCHGATE_SWITCH_UP)
+    {
+      Feld[xx][yy] = EL_SWITCHGATE_SWITCH_DOWN;
+      DrawLevelField(xx, yy);
+    }
+    else if (element == EL_SWITCHGATE_SWITCH_DOWN)
+    {
+      Feld[xx][yy] = EL_SWITCHGATE_SWITCH_UP;
+      DrawLevelField(xx, yy);
+    }
+    else if (element == EL_DC_SWITCHGATE_SWITCH_UP)
+    {
+      Feld[xx][yy] = EL_DC_SWITCHGATE_SWITCH_DOWN;
+      DrawLevelField(xx, yy);
+    }
+    else if (element == EL_DC_SWITCHGATE_SWITCH_DOWN)
+    {
+      Feld[xx][yy] = EL_DC_SWITCHGATE_SWITCH_UP;
+      DrawLevelField(xx, yy);
+    }
+#endif
+    else if (element == EL_SWITCHGATE_OPEN ||
+            element == EL_SWITCHGATE_OPENING)
+    {
+      Feld[xx][yy] = EL_SWITCHGATE_CLOSING;
 
-       PlayLevelSoundAction(xx, yy, ACTION_CLOSING);
-      }
-      else if (element == EL_SWITCHGATE_CLOSED ||
-              element == EL_SWITCHGATE_CLOSING)
-      {
-       Feld[xx][yy] = EL_SWITCHGATE_OPENING;
+      PlayLevelSoundAction(xx, yy, ACTION_CLOSING);
+    }
+    else if (element == EL_SWITCHGATE_CLOSED ||
+            element == EL_SWITCHGATE_CLOSING)
+    {
+      Feld[xx][yy] = EL_SWITCHGATE_OPENING;
 
-       PlayLevelSoundAction(xx, yy, ACTION_OPENING);
-      }
+      PlayLevelSoundAction(xx, yy, ACTION_OPENING);
     }
   }
 }
@@ -3607,50 +5505,155 @@ static void RedrawAllLightSwitchesAndInvisibleElements()
 {
   int x, y;
 
-  for (y = 0; y < lev_fieldy; y++)
+  SCAN_PLAYFIELD(x, y)
   {
-    for (x = 0; x < lev_fieldx; x++)
+    int element = Feld[x][y];
+
+    if (element == EL_LIGHT_SWITCH &&
+       game.light_time_left > 0)
     {
-      int element = Feld[x][y];
+      Feld[x][y] = EL_LIGHT_SWITCH_ACTIVE;
+      DrawLevelField(x, y);
+    }
+    else if (element == EL_LIGHT_SWITCH_ACTIVE &&
+            game.light_time_left == 0)
+    {
+      Feld[x][y] = EL_LIGHT_SWITCH;
+      DrawLevelField(x, y);
+    }
+    else if (element == EL_EMC_DRIPPER &&
+            game.light_time_left > 0)
+    {
+      Feld[x][y] = EL_EMC_DRIPPER_ACTIVE;
+      DrawLevelField(x, y);
+    }
+    else if (element == EL_EMC_DRIPPER_ACTIVE &&
+            game.light_time_left == 0)
+    {
+      Feld[x][y] = EL_EMC_DRIPPER;
+      DrawLevelField(x, y);
+    }
+    else if (element == EL_INVISIBLE_STEELWALL ||
+            element == EL_INVISIBLE_WALL ||
+            element == EL_INVISIBLE_SAND)
+    {
+      if (game.light_time_left > 0)
+       Feld[x][y] = getInvisibleActiveFromInvisibleElement(element);
 
-      if (element == EL_LIGHT_SWITCH &&
-         game.light_time_left > 0)
-      {
-       Feld[x][y] = EL_LIGHT_SWITCH_ACTIVE;
-       DrawLevelField(x, y);
-      }
-      else if (element == EL_LIGHT_SWITCH_ACTIVE &&
-              game.light_time_left == 0)
-      {
-       Feld[x][y] = EL_LIGHT_SWITCH;
-       DrawLevelField(x, y);
-      }
-      else if (element == EL_INVISIBLE_STEELWALL ||
-              element == EL_INVISIBLE_WALL ||
-              element == EL_INVISIBLE_SAND)
-      {
-       if (game.light_time_left > 0)
-         Feld[x][y] = getInvisibleActiveFromInvisibleElement(element);
+      DrawLevelField(x, y);
 
-       DrawLevelField(x, y);
+      /* uncrumble neighbour fields, if needed */
+      if (element == EL_INVISIBLE_SAND)
+       DrawLevelFieldCrumbledSandNeighbours(x, y);
+    }
+    else if (element == EL_INVISIBLE_STEELWALL_ACTIVE ||
+            element == EL_INVISIBLE_WALL_ACTIVE ||
+            element == EL_INVISIBLE_SAND_ACTIVE)
+    {
+      if (game.light_time_left == 0)
+       Feld[x][y] = getInvisibleFromInvisibleActiveElement(element);
 
-       /* uncrumble neighbour fields, if needed */
-       if (element == EL_INVISIBLE_SAND)
-         DrawLevelFieldCrumbledSandNeighbours(x, y);
-      }
-      else if (element == EL_INVISIBLE_STEELWALL_ACTIVE ||
-              element == EL_INVISIBLE_WALL_ACTIVE ||
-              element == EL_INVISIBLE_SAND_ACTIVE)
-      {
-       if (game.light_time_left == 0)
-         Feld[x][y] = getInvisibleFromInvisibleActiveElement(element);
+      DrawLevelField(x, y);
 
-       DrawLevelField(x, y);
+      /* re-crumble neighbour fields, if needed */
+      if (element == EL_INVISIBLE_SAND)
+       DrawLevelFieldCrumbledSandNeighbours(x, y);
+    }
+  }
+}
 
-       /* re-crumble neighbour fields, if needed */
-       if (element == EL_INVISIBLE_SAND)
-         DrawLevelFieldCrumbledSandNeighbours(x, y);
-      }
+static void RedrawAllInvisibleElementsForLenses()
+{
+  int x, y;
+
+  SCAN_PLAYFIELD(x, y)
+  {
+    int element = Feld[x][y];
+
+    if (element == EL_EMC_DRIPPER &&
+       game.lenses_time_left > 0)
+    {
+      Feld[x][y] = EL_EMC_DRIPPER_ACTIVE;
+      DrawLevelField(x, y);
+    }
+    else if (element == EL_EMC_DRIPPER_ACTIVE &&
+            game.lenses_time_left == 0)
+    {
+      Feld[x][y] = EL_EMC_DRIPPER;
+      DrawLevelField(x, y);
+    }
+    else if (element == EL_INVISIBLE_STEELWALL ||
+            element == EL_INVISIBLE_WALL ||
+            element == EL_INVISIBLE_SAND)
+    {
+      if (game.lenses_time_left > 0)
+       Feld[x][y] = getInvisibleActiveFromInvisibleElement(element);
+
+      DrawLevelField(x, y);
+
+      /* uncrumble neighbour fields, if needed */
+      if (element == EL_INVISIBLE_SAND)
+       DrawLevelFieldCrumbledSandNeighbours(x, y);
+    }
+    else if (element == EL_INVISIBLE_STEELWALL_ACTIVE ||
+            element == EL_INVISIBLE_WALL_ACTIVE ||
+            element == EL_INVISIBLE_SAND_ACTIVE)
+    {
+      if (game.lenses_time_left == 0)
+       Feld[x][y] = getInvisibleFromInvisibleActiveElement(element);
+
+      DrawLevelField(x, y);
+
+      /* re-crumble neighbour fields, if needed */
+      if (element == EL_INVISIBLE_SAND)
+       DrawLevelFieldCrumbledSandNeighbours(x, y);
+    }
+  }
+}
+
+static void RedrawAllInvisibleElementsForMagnifier()
+{
+  int x, y;
+
+  SCAN_PLAYFIELD(x, y)
+  {
+    int element = Feld[x][y];
+
+    if (element == EL_EMC_FAKE_GRASS &&
+       game.magnify_time_left > 0)
+    {
+      Feld[x][y] = EL_EMC_FAKE_GRASS_ACTIVE;
+      DrawLevelField(x, y);
+    }
+    else if (element == EL_EMC_FAKE_GRASS_ACTIVE &&
+            game.magnify_time_left == 0)
+    {
+      Feld[x][y] = EL_EMC_FAKE_GRASS;
+      DrawLevelField(x, y);
+    }
+    else if (IS_GATE_GRAY(element) &&
+            game.magnify_time_left > 0)
+    {
+      Feld[x][y] = (IS_RND_GATE_GRAY(element) ?
+                   element - EL_GATE_1_GRAY + EL_GATE_1_GRAY_ACTIVE :
+                   IS_EM_GATE_GRAY(element) ?
+                   element - EL_EM_GATE_1_GRAY + EL_EM_GATE_1_GRAY_ACTIVE :
+                   IS_EMC_GATE_GRAY(element) ?
+                   element - EL_EMC_GATE_5_GRAY + EL_EMC_GATE_5_GRAY_ACTIVE :
+                   element);
+      DrawLevelField(x, y);
+    }
+    else if (IS_GATE_GRAY_ACTIVE(element) &&
+            game.magnify_time_left == 0)
+    {
+      Feld[x][y] = (IS_RND_GATE_GRAY_ACTIVE(element) ?
+                   element - EL_GATE_1_GRAY_ACTIVE + EL_GATE_1_GRAY :
+                   IS_EM_GATE_GRAY_ACTIVE(element) ?
+                   element - EL_EM_GATE_1_GRAY_ACTIVE + EL_EM_GATE_1_GRAY :
+                   IS_EMC_GATE_GRAY_ACTIVE(element) ?
+                   element - EL_EMC_GATE_5_GRAY_ACTIVE + EL_EMC_GATE_5_GRAY :
+                   element);
+      DrawLevelField(x, y);
     }
   }
 }
@@ -3672,31 +5675,33 @@ static void ActivateTimegateSwitch(int x, int y)
 
   game.timegate_time_left = level.time_timegate * FRAMES_PER_SECOND;
 
-  for (yy = 0; yy < lev_fieldy; yy++)
+  SCAN_PLAYFIELD(xx, yy)
   {
-    for (xx = 0; xx < lev_fieldx; xx++)
-    {
-      int element = Feld[xx][yy];
-
-      if (element == EL_TIMEGATE_CLOSED ||
-         element == EL_TIMEGATE_CLOSING)
-      {
-       Feld[xx][yy] = EL_TIMEGATE_OPENING;
-       PlayLevelSound(xx, yy, SND_TIMEGATE_OPENING);
-      }
+    int element = Feld[xx][yy];
 
-      /*
-      else if (element == EL_TIMEGATE_SWITCH_ACTIVE)
-      {
-       Feld[xx][yy] = EL_TIMEGATE_SWITCH;
-       DrawLevelField(xx, yy);
-      }
-      */
+    if (element == EL_TIMEGATE_CLOSED ||
+       element == EL_TIMEGATE_CLOSING)
+    {
+      Feld[xx][yy] = EL_TIMEGATE_OPENING;
+      PlayLevelSound(xx, yy, SND_CLASS_TIMEGATE_OPENING);
+    }
 
+    /*
+    else if (element == EL_TIMEGATE_SWITCH_ACTIVE)
+    {
+      Feld[xx][yy] = EL_TIMEGATE_SWITCH;
+      DrawLevelField(xx, yy);
     }
+    */
+
   }
 
+#if 1
+  Feld[x][y] = (Feld[x][y] == EL_TIMEGATE_SWITCH ? EL_TIMEGATE_SWITCH_ACTIVE :
+               EL_DC_TIMEGATE_SWITCH_ACTIVE);
+#else
   Feld[x][y] = EL_TIMEGATE_SWITCH_ACTIVE;
+#endif
 }
 
 void Impact(int x, int y)
@@ -3721,6 +5726,28 @@ void Impact(int x, int y)
        ABS(MovPos[x][y + 1] + getElementMoveStepsize(x, y + 1)) >= TILEX)
       object_hit = FALSE;
 
+#if USE_QUICKSAND_IMPACT_BUGFIX
+    if (Feld[x][y + 1] == EL_QUICKSAND_EMPTYING && object_hit == FALSE)
+    {
+      RemoveMovingField(x, y + 1);
+      Feld[x][y + 1] = EL_QUICKSAND_EMPTY;
+      Feld[x][y + 2] = EL_ROCK;
+      DrawLevelField(x, y + 2);
+
+      object_hit = TRUE;
+    }
+
+    if (Feld[x][y + 1] == EL_QUICKSAND_FAST_EMPTYING && object_hit == FALSE)
+    {
+      RemoveMovingField(x, y + 1);
+      Feld[x][y + 1] = EL_QUICKSAND_FAST_EMPTY;
+      Feld[x][y + 2] = EL_ROCK;
+      DrawLevelField(x, y + 2);
+
+      object_hit = TRUE;
+    }
+#endif
+
     if (object_hit)
       smashed = MovingOrBlocked2Element(x, y + 1);
 
@@ -3747,7 +5774,8 @@ void Impact(int x, int y)
     Bang(x, y);
     return;
   }
-  else if (impact && element == EL_PEARL)
+  else if (impact && element == EL_PEARL &&
+          smashed != EL_DC_MAGIC_WALL && smashed != EL_DC_MAGIC_WALL_ACTIVE)
   {
     ResetGfxAnimation(x, y);
 
@@ -3765,7 +5793,7 @@ void Impact(int x, int y)
   if (impact && element == EL_AMOEBA_DROP)
   {
     if (object_hit && IS_PLAYER(x, y + 1))
-      KillHeroUnlessEnemyProtected(x, y + 1);
+      KillPlayerUnlessEnemyProtected(x, y + 1);
     else if (object_hit && smashed == EL_PENGUIN)
       Bang(x, y + 1);
     else
@@ -3780,34 +5808,40 @@ void Impact(int x, int y)
 
   if (object_hit)              /* check which object was hit */
   {
-    if (CAN_PASS_MAGIC_WALL(element) && 
-       (smashed == EL_MAGIC_WALL ||
-        smashed == EL_BD_MAGIC_WALL))
+    if ((CAN_PASS_MAGIC_WALL(element) && 
+        (smashed == EL_MAGIC_WALL ||
+         smashed == EL_BD_MAGIC_WALL)) ||
+       (CAN_PASS_DC_MAGIC_WALL(element) &&
+        smashed == EL_DC_MAGIC_WALL))
     {
       int xx, yy;
       int activated_magic_wall =
        (smashed == EL_MAGIC_WALL ? EL_MAGIC_WALL_ACTIVE :
-        EL_BD_MAGIC_WALL_ACTIVE);
+        smashed == EL_BD_MAGIC_WALL ? EL_BD_MAGIC_WALL_ACTIVE :
+        EL_DC_MAGIC_WALL_ACTIVE);
 
       /* activate magic wall / mill */
-      for (yy = 0; yy < lev_fieldy; yy++)
-       for (xx = 0; xx < lev_fieldx; xx++)
-         if (Feld[xx][yy] == smashed)
-           Feld[xx][yy] = activated_magic_wall;
+      SCAN_PLAYFIELD(xx, yy)
+      {
+       if (Feld[xx][yy] == smashed)
+         Feld[xx][yy] = activated_magic_wall;
+      }
 
       game.magic_wall_time_left = level.time_magic_wall * FRAMES_PER_SECOND;
       game.magic_wall_active = TRUE;
 
       PlayLevelSound(x, y, (smashed == EL_MAGIC_WALL ?
                            SND_MAGIC_WALL_ACTIVATING :
-                           SND_BD_MAGIC_WALL_ACTIVATING));
+                           smashed == EL_BD_MAGIC_WALL ?
+                           SND_BD_MAGIC_WALL_ACTIVATING :
+                           SND_DC_MAGIC_WALL_ACTIVATING));
     }
 
     if (IS_PLAYER(x, y + 1))
     {
       if (CAN_SMASH_PLAYER(element))
       {
-       KillHeroUnlessEnemyProtected(x, y + 1);
+       KillPlayerUnlessEnemyProtected(x, y + 1);
        return;
       }
     }
@@ -3880,7 +5914,9 @@ void Impact(int x, int y)
          ToggleBeltSwitch(x, y + 1);
        }
        else if (smashed == EL_SWITCHGATE_SWITCH_UP ||
-                smashed == EL_SWITCHGATE_SWITCH_DOWN)
+                smashed == EL_SWITCHGATE_SWITCH_DOWN ||
+                smashed == EL_DC_SWITCHGATE_SWITCH_UP ||
+                smashed == EL_DC_SWITCHGATE_SWITCH_DOWN)
        {
          ToggleSwitchgateSwitch(x, y + 1);
        }
@@ -3899,8 +5935,8 @@ void Impact(int x, int y)
 
          CheckElementChangeBySide(x, y + 1, smashed, element,
                                   CE_SWITCHED, CH_SIDE_TOP);
-         CheckTriggeredElementChangeBySide(x, y + 1, smashed,
-                                           CE_SWITCH_OF_X, CH_SIDE_TOP);
+         CheckTriggeredElementChangeBySide(x, y + 1, smashed, CE_SWITCH_OF_X,
+                                           CH_SIDE_TOP);
        }
       }
       else
@@ -3913,12 +5949,15 @@ void Impact(int x, int y)
   /* play sound of magic wall / mill */
   if (!last_line &&
       (Feld[x][y + 1] == EL_MAGIC_WALL_ACTIVE ||
-       Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE))
+       Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE ||
+       Feld[x][y + 1] == EL_DC_MAGIC_WALL_ACTIVE))
   {
     if (Feld[x][y + 1] == EL_MAGIC_WALL_ACTIVE)
       PlayLevelSound(x, y, SND_MAGIC_WALL_FILLING);
     else if (Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE)
       PlayLevelSound(x, y, SND_BD_MAGIC_WALL_FILLING);
+    else if (Feld[x][y + 1] == EL_DC_MAGIC_WALL_ACTIVE)
+      PlayLevelSound(x, y, SND_DC_MAGIC_WALL_FILLING);
 
     return;
   }
@@ -3932,7 +5971,7 @@ inline static void TurnRoundExt(int x, int y)
 {
   static struct
   {
-    int x, y;
+    int dx, dy;
   } move_xy[] =
   {
     {  0,  0 },
@@ -3967,10 +6006,10 @@ inline static void TurnRoundExt(int x, int y)
   int right_dir = turn[old_move_dir].right;
   int back_dir  = turn[old_move_dir].back;
 
-  int left_dx  = move_xy[left_dir].x,     left_dy  = move_xy[left_dir].y;
-  int right_dx = move_xy[right_dir].x,    right_dy = move_xy[right_dir].y;
-  int move_dx  = move_xy[old_move_dir].x, move_dy  = move_xy[old_move_dir].y;
-  int back_dx  = move_xy[back_dir].x,     back_dy  = move_xy[back_dir].y;
+  int left_dx  = move_xy[left_dir].dx,     left_dy  = move_xy[left_dir].dy;
+  int right_dx = move_xy[right_dir].dx,    right_dy = move_xy[right_dir].dy;
+  int move_dx  = move_xy[old_move_dir].dx, move_dy  = move_xy[old_move_dir].dy;
+  int back_dx  = move_xy[back_dir].dx,     back_dy  = move_xy[back_dir].dy;
 
   int left_x  = x + left_dx,  left_y  = y + left_dy;
   int right_x = x + right_dx, right_y = y + right_dy;
@@ -4123,8 +6162,8 @@ inline static void TurnRoundExt(int x, int y)
     else
       MovDir[x][y] = back_dir;
 
-    xx = x + move_xy[MovDir[x][y]].x;
-    yy = y + move_xy[MovDir[x][y]].y;
+    xx = x + move_xy[MovDir[x][y]].dx;
+    yy = y + move_xy[MovDir[x][y]].dy;
 
     if (!IN_LEV_FIELD(xx, yy) ||
         (!IS_FREE(xx, yy) && !IS_FOOD_PIG(Feld[xx][yy])))
@@ -4151,8 +6190,8 @@ inline static void TurnRoundExt(int x, int y)
     else
       MovDir[x][y] = back_dir;
 
-    xx = x + move_xy[MovDir[x][y]].x;
-    yy = y + move_xy[MovDir[x][y]].y;
+    xx = x + move_xy[MovDir[x][y]].dx;
+    yy = y + move_xy[MovDir[x][y]].dy;
 
     if (!IN_LEV_FIELD_AND_IS_FREE(xx, yy))
       MovDir[x][y] = old_move_dir;
@@ -4188,21 +6227,40 @@ inline static void TurnRoundExt(int x, int y)
   }
   else if (element == EL_BALLOON)
   {
-    MovDir[x][y] = game.balloon_dir;
+    MovDir[x][y] = game.wind_direction;
     MovDelay[x][y] = 0;
   }
   else if (element == EL_SPRING)
   {
+#if USE_NEW_SPRING_BUMPER
+    if (MovDir[x][y] & MV_HORIZONTAL)
+    {
+      if (SPRING_CAN_BUMP_FROM_FIELD(move_x, move_y) &&
+         !SPRING_CAN_ENTER_FIELD(element, x, y + 1))
+      {
+       Feld[move_x][move_y] = EL_EMC_SPRING_BUMPER_ACTIVE;
+       ResetGfxAnimation(move_x, move_y);
+       DrawLevelField(move_x, move_y);
+
+       MovDir[x][y] = back_dir;
+      }
+      else if (!SPRING_CAN_ENTER_FIELD(element, move_x, move_y) ||
+              SPRING_CAN_ENTER_FIELD(element, x, y + 1))
+       MovDir[x][y] = MV_NONE;
+    }
+#else
     if (MovDir[x][y] & MV_HORIZONTAL &&
        (!SPRING_CAN_ENTER_FIELD(element, move_x, move_y) ||
         SPRING_CAN_ENTER_FIELD(element, x, y + 1)))
-      MovDir[x][y] = MV_NO_MOVING;
+      MovDir[x][y] = MV_NONE;
+#endif
 
     MovDelay[x][y] = 0;
   }
   else if (element == EL_ROBOT ||
           element == EL_SATELLITE ||
-          element == EL_PENGUIN)
+          element == EL_PENGUIN ||
+          element == EL_EMC_ANDROID)
   {
     int attr_x = -1, attr_y = -1;
 
@@ -4256,7 +6314,10 @@ inline static void TurnRoundExt(int x, int y)
        int ex = x + xy[i][0];
        int ey = y + xy[i][1];
 
-       if (IN_LEV_FIELD(ex, ey) && Feld[ex][ey] == EL_EXIT_OPEN)
+       if (IN_LEV_FIELD(ex, ey) && (Feld[ex][ey] == EL_EXIT_OPEN ||
+                                    Feld[ex][ey] == EL_EM_EXIT_OPEN ||
+                                    Feld[ex][ey] == EL_STEEL_EXIT_OPEN ||
+                                    Feld[ex][ey] == EL_EM_STEEL_EXIT_OPEN))
        {
          attr_x = ex;
          attr_y = ey;
@@ -4265,7 +6326,7 @@ inline static void TurnRoundExt(int x, int y)
       }
     }
 
-    MovDir[x][y] = MV_NO_MOVING;
+    MovDir[x][y] = MV_NONE;
     if (attr_x < x)
       MovDir[x][y] |= (AllPlayersGone ? MV_RIGHT : MV_LEFT);
     else if (attr_x > x)
@@ -4303,21 +6364,21 @@ inline static void TurnRoundExt(int x, int y)
          new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
        Moving2Blocked(x, y, &newx, &newy);
 
-       if (PENGUIN_CAN_ENTER_FIELD(EL_PENGUIN, newx, newy))
+       if (PENGUIN_CAN_ENTER_FIELD(element, newx, newy))
          return;
 
        MovDir[x][y] =
          new_move_dir & (!first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
        Moving2Blocked(x, y, &newx, &newy);
 
-       if (PENGUIN_CAN_ENTER_FIELD(EL_PENGUIN, newx, newy))
+       if (PENGUIN_CAN_ENTER_FIELD(element, newx, newy))
          return;
 
        MovDir[x][y] = old_move_dir;
        return;
       }
     }
-    else       /* (element == EL_SATELLITE) */
+    else if (element == EL_SATELLITE)
     {
       int newx, newy;
 
@@ -4346,6 +6407,144 @@ inline static void TurnRoundExt(int x, int y)
        return;
       }
     }
+    else if (element == EL_EMC_ANDROID)
+    {
+      static int check_pos[16] =
+      {
+       -1,             /*  0 => (invalid)          */
+       7,              /*  1 => MV_LEFT            */
+       3,              /*  2 => MV_RIGHT           */
+       -1,             /*  3 => (invalid)          */
+       1,              /*  4 =>            MV_UP   */
+       0,              /*  5 => MV_LEFT  | MV_UP   */
+       2,              /*  6 => MV_RIGHT | MV_UP   */
+       -1,             /*  7 => (invalid)          */
+       5,              /*  8 =>            MV_DOWN */
+       6,              /*  9 => MV_LEFT  | MV_DOWN */
+       4,              /* 10 => MV_RIGHT | MV_DOWN */
+       -1,             /* 11 => (invalid)          */
+       -1,             /* 12 => (invalid)          */
+       -1,             /* 13 => (invalid)          */
+       -1,             /* 14 => (invalid)          */
+       -1,             /* 15 => (invalid)          */
+      };
+      static struct
+      {
+       int dx, dy;
+       int dir;
+      } check_xy[8] =
+      {
+        { -1, -1,      MV_LEFT  | MV_UP   },
+               {  0, -1,                  MV_UP   },
+       { +1, -1,       MV_RIGHT | MV_UP   },
+       { +1,  0,       MV_RIGHT           },
+       { +1, +1,       MV_RIGHT | MV_DOWN },
+       {  0, +1,                  MV_DOWN },
+       { -1, +1,       MV_LEFT  | MV_DOWN },
+       { -1,  0,       MV_LEFT            },
+      };
+      int start_pos, check_order;
+      boolean can_clone = FALSE;
+      int i;
+
+      /* check if there is any free field around current position */
+      for (i = 0; i < 8; i++)
+      {
+       int newx = x + check_xy[i].dx;
+       int newy = y + check_xy[i].dy;
+
+       if (IN_LEV_FIELD_AND_IS_FREE(newx, newy))
+       {
+         can_clone = TRUE;
+
+         break;
+       }
+      }
+
+      if (can_clone)           /* randomly find an element to clone */
+      {
+       can_clone = FALSE;
+
+       start_pos = check_pos[RND(8)];
+       check_order = (RND(2) ? -1 : +1);
+
+       for (i = 0; i < 8; i++)
+       {
+         int pos_raw = start_pos + i * check_order;
+         int pos = (pos_raw + 8) % 8;
+         int newx = x + check_xy[pos].dx;
+         int newy = y + check_xy[pos].dy;
+
+         if (ANDROID_CAN_CLONE_FIELD(newx, newy))
+         {
+           element_info[element].move_leave_type = LEAVE_TYPE_LIMITED;
+           element_info[element].move_leave_element = EL_TRIGGER_ELEMENT;
+
+           Store[x][y] = Feld[newx][newy];
+
+           can_clone = TRUE;
+
+           break;
+         }
+       }
+      }
+
+      if (can_clone)           /* randomly find a direction to move */
+      {
+       can_clone = FALSE;
+
+       start_pos = check_pos[RND(8)];
+       check_order = (RND(2) ? -1 : +1);
+
+       for (i = 0; i < 8; i++)
+       {
+         int pos_raw = start_pos + i * check_order;
+         int pos = (pos_raw + 8) % 8;
+         int newx = x + check_xy[pos].dx;
+         int newy = y + check_xy[pos].dy;
+         int new_move_dir = check_xy[pos].dir;
+
+         if (IN_LEV_FIELD_AND_IS_FREE(newx, newy))
+         {
+           MovDir[x][y] = new_move_dir;
+           MovDelay[x][y] = level.android_clone_time * 8 + 1;
+
+           can_clone = TRUE;
+
+           break;
+         }
+       }
+      }
+
+      if (can_clone)           /* cloning and moving successful */
+       return;
+
+      /* cannot clone -- try to move towards player */
+
+      start_pos = check_pos[MovDir[x][y] & 0x0f];
+      check_order = (RND(2) ? -1 : +1);
+
+      for (i = 0; i < 3; i++)
+      {
+       /* first check start_pos, then previous/next or (next/previous) pos */
+       int pos_raw = start_pos + (i < 2 ? i : -1) * check_order;
+       int pos = (pos_raw + 8) % 8;
+       int newx = x + check_xy[pos].dx;
+       int newy = y + check_xy[pos].dy;
+       int new_move_dir = check_xy[pos].dir;
+
+       if (IS_PLAYER(newx, newy))
+         break;
+
+       if (ANDROID_CAN_ENTER_FIELD(element, newx, newy))
+       {
+         MovDir[x][y] = new_move_dir;
+         MovDelay[x][y] = level.android_move_time * 8 + 1;
+
+         break;
+       }
+      }
+    }
   }
   else if (move_pattern == MV_TURNING_LEFT ||
           move_pattern == MV_TURNING_RIGHT ||
@@ -4359,10 +6558,8 @@ inline static void TurnRoundExt(int x, int y)
     boolean can_turn_right =
       CUSTOM_ELEMENT_CAN_ENTER_FIELD(element, right_x,right_y);
 
-#if USE_CAN_MOVE_NOT_MOVING
-    if (element_info[element].move_stepsize == 0)      /* not moving */
+    if (element_info[element].move_stepsize == 0)      /* "not moving" */
       return;
-#endif
 
     if (move_pattern == MV_TURNING_LEFT)
       MovDir[x][y] = left_dir;
@@ -4404,6 +6601,11 @@ inline static void TurnRoundExt(int x, int y)
     MovDir[x][y] = move_pattern;
     MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
   }
+  else if (move_pattern & MV_WIND_DIRECTION)
+  {
+    MovDir[x][y] = game.wind_direction;
+    MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
+  }
   else if (move_pattern == MV_ALONG_LEFT_SIDE)
   {
     if (CUSTOM_ELEMENT_CAN_ENTER_FIELD(element, left_x, left_y))
@@ -4457,7 +6659,7 @@ inline static void TurnRoundExt(int x, int y)
       }
     }
 
-    MovDir[x][y] = MV_NO_MOVING;
+    MovDir[x][y] = MV_NONE;
     if (attr_x < x)
       MovDir[x][y] |= (move_away ? MV_RIGHT : MV_LEFT);
     else if (attr_x > x)
@@ -4474,15 +6676,13 @@ inline static void TurnRoundExt(int x, int y)
       boolean first_horiz = RND(2);
       int new_move_dir = MovDir[x][y];
 
-#if USE_CAN_MOVE_NOT_MOVING
-      if (element_info[element].move_stepsize == 0)    /* not moving */
+      if (element_info[element].move_stepsize == 0)    /* "not moving" */
       {
        first_horiz = (ABS(attr_x - x) >= ABS(attr_y - y));
        MovDir[x][y] &= (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
 
        return;
       }
-#endif
 
       MovDir[x][y] =
        new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
@@ -4505,7 +6705,7 @@ inline static void TurnRoundExt(int x, int y)
           move_pattern == MV_WHEN_DROPPED)
   {
     if (!CUSTOM_ELEMENT_CAN_ENTER_FIELD(element, move_x, move_y))
-      MovDir[x][y] = MV_NO_MOVING;
+      MovDir[x][y] = MV_NONE;
 
     MovDelay[x][y] = 0;
   }
@@ -4533,7 +6733,7 @@ inline static void TurnRoundExt(int x, int y)
     };
     boolean hunter_mode = (move_pattern == MV_MAZE_HUNTER);
     int move_preference = -1000000;    /* start with very low preference */
-    int new_move_dir = MV_NO_MOVING;
+    int new_move_dir = MV_NONE;
     int start_test = RND(4);
     int i;
 
@@ -4593,7 +6793,9 @@ static void TurnRound(int x, int y)
     GfxFrame[x][y] = 0;
 
   if (MovDelay[x][y])
-    GfxAction[x][y] = ACTION_TURNING_FROM_LEFT + MV_DIR_BIT(direction);
+    GfxAction[x][y] = ACTION_TURNING_FROM_LEFT + MV_DIR_TO_BIT(direction);
+
+  ResetGfxFrame(x, y, FALSE);
 }
 
 static boolean JustBeingPushed(int x, int y)
@@ -4643,7 +6845,12 @@ void StartMoving(int x, int y)
        started_moving = TRUE;
 
        Feld[x][y] = EL_QUICKSAND_EMPTYING;
+#if USE_QUICKSAND_BD_ROCK_BUGFIX
+       if (Store[x][y] != EL_ROCK && Store[x][y] != EL_BD_ROCK)
+         Store[x][y] = EL_ROCK;
+#else
        Store[x][y] = EL_ROCK;
+#endif
 
        PlayLevelSoundAction(x, y, ACTION_EMPTYING);
       }
@@ -4667,6 +6874,43 @@ void StartMoving(int x, int y)
        PlayLevelSoundAction(x, y, ACTION_FILLING);
       }
     }
+    else if (element == EL_QUICKSAND_FAST_FULL)
+    {
+      if (IS_FREE(x, y + 1))
+      {
+       InitMovingField(x, y, MV_DOWN);
+       started_moving = TRUE;
+
+       Feld[x][y] = EL_QUICKSAND_FAST_EMPTYING;
+#if USE_QUICKSAND_BD_ROCK_BUGFIX
+       if (Store[x][y] != EL_ROCK && Store[x][y] != EL_BD_ROCK)
+         Store[x][y] = EL_ROCK;
+#else
+       Store[x][y] = EL_ROCK;
+#endif
+
+       PlayLevelSoundAction(x, y, ACTION_EMPTYING);
+      }
+      else if (Feld[x][y + 1] == EL_QUICKSAND_FAST_EMPTY)
+      {
+       if (!MovDelay[x][y])
+         MovDelay[x][y] = TILEY + 1;
+
+       if (MovDelay[x][y])
+       {
+         MovDelay[x][y]--;
+         if (MovDelay[x][y])
+           return;
+       }
+
+       Feld[x][y] = EL_QUICKSAND_FAST_EMPTY;
+       Feld[x][y + 1] = EL_QUICKSAND_FAST_FULL;
+       Store[x][y + 1] = Store[x][y];
+       Store[x][y] = 0;
+
+       PlayLevelSoundAction(x, y, ACTION_FILLING);
+      }
+    }
     else if ((element == EL_ROCK || element == EL_BD_ROCK) &&
             Feld[x][y + 1] == EL_QUICKSAND_EMPTY)
     {
@@ -4678,6 +6922,17 @@ void StartMoving(int x, int y)
 
       PlayLevelSoundAction(x, y, ACTION_FILLING);
     }
+    else if ((element == EL_ROCK || element == EL_BD_ROCK) &&
+            Feld[x][y + 1] == EL_QUICKSAND_FAST_EMPTY)
+    {
+      InitMovingField(x, y, MV_DOWN);
+      started_moving = TRUE;
+
+      Feld[x][y] = EL_QUICKSAND_FAST_FILLING;
+      Store[x][y] = element;
+
+      PlayLevelSoundAction(x, y, ACTION_FILLING);
+    }
     else if (element == EL_MAGIC_WALL_FULL)
     {
       if (IS_FREE(x, y + 1))
@@ -4714,7 +6969,7 @@ void StartMoving(int x, int y)
        started_moving = TRUE;
 
        Feld[x][y] = EL_BD_MAGIC_WALL_EMPTYING;
-       Store[x][y] = EL_CHANGED2(Store[x][y]);
+       Store[x][y] = EL_CHANGED_BD(Store[x][y]);
       }
       else if (Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE)
       {
@@ -4730,20 +6985,52 @@ void StartMoving(int x, int y)
 
        Feld[x][y] = EL_BD_MAGIC_WALL_ACTIVE;
        Feld[x][y + 1] = EL_BD_MAGIC_WALL_FULL;
-       Store[x][y + 1] = EL_CHANGED2(Store[x][y]);
+       Store[x][y + 1] = EL_CHANGED_BD(Store[x][y]);
+       Store[x][y] = 0;
+      }
+    }
+    else if (element == EL_DC_MAGIC_WALL_FULL)
+    {
+      if (IS_FREE(x, y + 1))
+      {
+       InitMovingField(x, y, MV_DOWN);
+       started_moving = TRUE;
+
+       Feld[x][y] = EL_DC_MAGIC_WALL_EMPTYING;
+       Store[x][y] = EL_CHANGED_DC(Store[x][y]);
+      }
+      else if (Feld[x][y + 1] == EL_DC_MAGIC_WALL_ACTIVE)
+      {
+       if (!MovDelay[x][y])
+         MovDelay[x][y] = TILEY/4 + 1;
+
+       if (MovDelay[x][y])
+       {
+         MovDelay[x][y]--;
+         if (MovDelay[x][y])
+           return;
+       }
+
+       Feld[x][y] = EL_DC_MAGIC_WALL_ACTIVE;
+       Feld[x][y + 1] = EL_DC_MAGIC_WALL_FULL;
+       Store[x][y + 1] = EL_CHANGED_DC(Store[x][y]);
        Store[x][y] = 0;
       }
     }
-    else if (CAN_PASS_MAGIC_WALL(element) &&
-            (Feld[x][y + 1] == EL_MAGIC_WALL_ACTIVE ||
-             Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE))
+    else if ((CAN_PASS_MAGIC_WALL(element) &&
+             (Feld[x][y + 1] == EL_MAGIC_WALL_ACTIVE ||
+              Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE)) ||
+            (CAN_PASS_DC_MAGIC_WALL(element) &&
+             (Feld[x][y + 1] == EL_DC_MAGIC_WALL_ACTIVE)))
+
     {
       InitMovingField(x, y, MV_DOWN);
       started_moving = TRUE;
 
       Feld[x][y] =
        (Feld[x][y + 1] == EL_MAGIC_WALL_ACTIVE ? EL_MAGIC_WALL_FILLING :
-        EL_BD_MAGIC_WALL_FILLING);
+        Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE ? EL_BD_MAGIC_WALL_FILLING :
+        EL_DC_MAGIC_WALL_FILLING);
       Store[x][y] = element;
     }
     else if (CAN_FALL(element) && Feld[x][y + 1] == EL_ACID)
@@ -4755,10 +7042,14 @@ void StartMoving(int x, int y)
 
       Store[x][y] = EL_ACID;
     }
-    else if ((game.engine_version >= VERSION_IDENT(3,1,0,0) &&
+    else if (
+#if USE_FIX_IMPACT_COLLISION
+            (game.engine_version >= VERSION_IDENT(3,1,0,0) &&
+             CheckImpact[x][y] && !IS_FREE(x, y + 1)) ||
+#else
+            (game.engine_version >= VERSION_IDENT(3,1,0,0) &&
              CheckCollision[x][y] && !IS_FREE(x, y + 1)) ||
-
-#if USE_IMPACT_BUGFIX
+#endif
             (game.engine_version >= VERSION_IDENT(3,0,7,0) &&
              CAN_FALL(element) && WasJustFalling[x][y] &&
              (Feld[x][y + 1] == EL_BLOCKED || IS_PLAYER(x, y + 1))) ||
@@ -4766,15 +7057,6 @@ void StartMoving(int x, int y)
             (game.engine_version < VERSION_IDENT(2,2,0,7) &&
              CAN_FALL(element) && WasJustMoving[x][y] && !Pushed[x][y + 1] &&
              (Feld[x][y + 1] == EL_BLOCKED)))
-#else
-            (game.engine_version >= VERSION_IDENT(3,0,7,0) &&
-             CAN_SMASH(element) && WasJustFalling[x][y] &&
-             (Feld[x][y + 1] == EL_BLOCKED || IS_PLAYER(x, y + 1))) ||
-
-            (game.engine_version < VERSION_IDENT(2,2,0,7) &&
-             CAN_SMASH(element) && WasJustMoving[x][y] && !Pushed[x][y + 1] &&
-             (Feld[x][y + 1] == EL_BLOCKED)))
-#endif
     {
       /* this is needed for a special case not covered by calling "Impact()"
         from "ContinueMoving()": if an element moves to a tile directly below
@@ -4787,12 +7069,13 @@ void StartMoving(int x, int y)
         simply not covered here... :-/ ) */
 
       CheckCollision[x][y] = 0;
+      CheckImpact[x][y] = 0;
 
       Impact(x, y);
     }
     else if (IS_FREE(x, y + 1) && element == EL_SPRING && level.use_spring_bug)
     {
-      if (MovDir[x][y] == MV_NO_MOVING)
+      if (MovDir[x][y] == MV_NONE)
       {
        InitMovingField(x, y, MV_DOWN);
        started_moving = TRUE;
@@ -4824,11 +7107,26 @@ void StartMoving(int x, int y)
                                 Feld[x + 1][y + 1] == EL_ACID));
       boolean can_fall_any  = (can_fall_left || can_fall_right);
       boolean can_fall_both = (can_fall_left && can_fall_right);
+      int slippery_type = element_info[Feld[x][y + 1]].slippery_type;
 
-      if (can_fall_any && IS_CUSTOM_ELEMENT(Feld[x][y + 1]))
+#if USE_NEW_ALL_SLIPPERY
+      if (can_fall_any && slippery_type != SLIPPERY_ANY_RANDOM)
       {
-       int slippery_type = element_info[Feld[x][y + 1]].slippery_type;
+       if (slippery_type == SLIPPERY_ANY_LEFT_RIGHT && can_fall_both)
+         can_fall_right = FALSE;
+       else if (slippery_type == SLIPPERY_ANY_RIGHT_LEFT && can_fall_both)
+         can_fall_left = FALSE;
+       else if (slippery_type == SLIPPERY_ONLY_LEFT)
+         can_fall_right = FALSE;
+       else if (slippery_type == SLIPPERY_ONLY_RIGHT)
+         can_fall_left = FALSE;
 
+       can_fall_any  = (can_fall_left || can_fall_right);
+       can_fall_both = FALSE;
+      }
+#else
+      if (can_fall_any && IS_CUSTOM_ELEMENT(Feld[x][y + 1]))
+      {
        if (slippery_type == SLIPPERY_ONLY_LEFT)
          can_fall_right = FALSE;
        else if (slippery_type == SLIPPERY_ONLY_RIGHT)
@@ -4841,7 +7139,10 @@ void StartMoving(int x, int y)
        can_fall_any  = (can_fall_left || can_fall_right);
        can_fall_both = (can_fall_left && can_fall_right);
       }
+#endif
 
+#if USE_NEW_ALL_SLIPPERY
+#else
 #if USE_NEW_SP_SLIPPERY
       /* !!! better use the same properties as for custom elements here !!! */
       else if (game.engine_version >= VERSION_IDENT(3,1,1,0) &&
@@ -4851,7 +7152,19 @@ void StartMoving(int x, int y)
        can_fall_both = FALSE;
       }
 #endif
+#endif
+
+#if USE_NEW_ALL_SLIPPERY
+      if (can_fall_both)
+      {
+       if (element == EL_BD_ROCK || element == EL_BD_DIAMOND)
+         can_fall_right = FALSE;       /* slip down on left side */
+       else
+         can_fall_left = !(can_fall_right = RND(2));
 
+       can_fall_both = FALSE;
+      }
+#else
       if (can_fall_both)
       {
        if (game.emulation == EMU_BOULDERDASH ||
@@ -4862,6 +7175,7 @@ void StartMoving(int x, int y)
 
        can_fall_both = FALSE;
       }
+#endif
 
       if (can_fall_any)
       {
@@ -4903,7 +7217,7 @@ void StartMoving(int x, int y)
 
   /* not "else if" because of elements that can fall and move (EL_SPRING) */
 #if 0
-  if (CAN_MOVE(element) && !started_moving && MovDir[x][y] != MV_NO_MOVING)
+  if (CAN_MOVE(element) && !started_moving && MovDir[x][y] != MV_NONE)
 #else
   if (CAN_MOVE(element) && !started_moving)
 #endif
@@ -4913,7 +7227,7 @@ void StartMoving(int x, int y)
 
 #if 0
 #if DEBUG
-    if (MovDir[x][y] == MV_NO_MOVING)
+    if (MovDir[x][y] == MV_NONE)
     {
       printf("StartMoving(): %d,%d: element %d ['%s'] not moving\n",
             x, y, element, element_info[element].token_name);
@@ -5064,13 +7378,14 @@ void StartMoving(int x, int y)
        IN_LEV_FIELD(newx, newy) && IS_PLAYER(newx, newy) &&
        !PLAYER_ENEMY_PROTECTED(newx, newy))
     {
-      TestIfBadThingRunsIntoHero(x, y, MovDir[x][y]);
+      TestIfBadThingRunsIntoPlayer(x, y, MovDir[x][y]);
 
       return;
     }
 
     else if (CAN_MOVE_INTO_ACID(element) &&
             IN_LEV_FIELD(newx, newy) && Feld[newx][newy] == EL_ACID &&
+            !IS_MV_DIAGONAL(MovDir[x][y]) &&
             (MovDir[x][y] == MV_DOWN ||
              game.engine_version >= VERSION_IDENT(3,1,0,0)))
     {
@@ -5079,7 +7394,10 @@ void StartMoving(int x, int y)
     }
     else if (element == EL_PENGUIN && IN_LEV_FIELD(newx, newy))
     {
-      if (Feld[newx][newy] == EL_EXIT_OPEN)
+      if (Feld[newx][newy] == EL_EXIT_OPEN ||
+         Feld[newx][newy] == EL_EM_EXIT_OPEN ||
+         Feld[newx][newy] == EL_STEEL_EXIT_OPEN ||
+         Feld[newx][newy] == EL_EM_STEEL_EXIT_OPEN)
       {
        RemoveField(x, y);
        DrawLevelField(x, y);
@@ -5091,16 +7409,16 @@ void StartMoving(int x, int y)
        local_player->friends_still_needed--;
        if (!local_player->friends_still_needed &&
            !local_player->GameOver && AllPlayersGone)
-         local_player->LevelSolved = local_player->GameOver = TRUE;
+         PlayerWins(local_player);
 
        return;
       }
       else if (IS_FOOD_PENGUIN(Feld[newx][newy]))
       {
-       if (DigField(local_player, x, y, newx, newy, 0,0, DF_DIG) == MF_MOVING)
+       if (DigField(local_player, x, y, newx, newy, 0,0, DF_DIG) == MP_MOVING)
          DrawLevelField(newx, newy);
        else
-         GfxDir[x][y] = MovDir[x][y] = MV_NO_MOVING;
+         GfxDir[x][y] = MovDir[x][y] = MV_NONE;
       }
       else if (!IS_FREE(newx, newy))
       {
@@ -5138,6 +7456,97 @@ void StartMoving(int x, int y)
        return;
       }
     }
+    else if (element == EL_EMC_ANDROID && IN_LEV_FIELD(newx, newy))
+    {
+      if (Store[x][y] != EL_EMPTY)
+      {
+       boolean can_clone = FALSE;
+       int xx, yy;
+
+       /* check if element to clone is still there */
+       for (yy = y - 1; yy <= y + 1; yy++) for (xx = x - 1; xx <= x + 1; xx++)
+       {
+         if (IN_LEV_FIELD(xx, yy) && Feld[xx][yy] == Store[x][y])
+         {
+           can_clone = TRUE;
+
+           break;
+         }
+       }
+
+       /* cannot clone or target field not free anymore -- do not clone */
+       if (!can_clone || !ANDROID_CAN_ENTER_FIELD(element, newx, newy))
+         Store[x][y] = EL_EMPTY;
+      }
+
+      if (ANDROID_CAN_ENTER_FIELD(element, newx, newy))
+      {
+       if (IS_MV_DIAGONAL(MovDir[x][y]))
+       {
+         int diagonal_move_dir = MovDir[x][y];
+         int stored = Store[x][y];
+         int change_delay = 8;
+         int graphic;
+
+         /* android is moving diagonally */
+
+         CreateField(x, y, EL_DIAGONAL_SHRINKING);
+
+         Store[x][y] = (stored == EL_ACID ? EL_EMPTY : stored);
+         GfxElement[x][y] = EL_EMC_ANDROID;
+         GfxAction[x][y] = ACTION_SHRINKING;
+         GfxDir[x][y] = diagonal_move_dir;
+         ChangeDelay[x][y] = change_delay;
+
+         graphic = el_act_dir2img(GfxElement[x][y], GfxAction[x][y],
+                                  GfxDir[x][y]);
+
+         DrawLevelGraphicAnimation(x, y, graphic);
+         PlayLevelSoundAction(x, y, ACTION_SHRINKING);
+
+         if (Feld[newx][newy] == EL_ACID)
+         {
+           SplashAcid(newx, newy);
+
+           return;
+         }
+
+         CreateField(newx, newy, EL_DIAGONAL_GROWING);
+
+         Store[newx][newy] = EL_EMC_ANDROID;
+         GfxElement[newx][newy] = EL_EMC_ANDROID;
+         GfxAction[newx][newy] = ACTION_GROWING;
+         GfxDir[newx][newy] = diagonal_move_dir;
+         ChangeDelay[newx][newy] = change_delay;
+
+         graphic = el_act_dir2img(GfxElement[newx][newy],
+                                  GfxAction[newx][newy], GfxDir[newx][newy]);
+
+         DrawLevelGraphicAnimation(newx, newy, graphic);
+         PlayLevelSoundAction(newx, newy, ACTION_GROWING);
+
+         return;
+       }
+       else
+       {
+         Feld[newx][newy] = EL_EMPTY;
+         DrawLevelField(newx, newy);
+
+         PlayLevelSoundAction(x, y, ACTION_DIGGING);
+       }
+      }
+      else if (!IS_FREE(newx, newy))
+      {
+#if 0
+       if (IS_PLAYER(x, y))
+         DrawPlayerField(x, y);
+       else
+         DrawLevelField(x, y);
+#endif
+
+       return;
+      }
+    }
     else if (IS_CUSTOM_ELEMENT(element) &&
             CUSTOM_ELEMENT_CAN_ENTER_FIELD(element, newx, newy))
     {
@@ -5179,17 +7588,20 @@ void StartMoving(int x, int y)
       }
 
       Store[newx][newy] = EL_EMPTY;
+#if 1
+      /* this makes it possible to leave the removed element again */
+      if (IS_EQUAL_OR_IN_GROUP(new_element, MOVE_ENTER_EL(element)))
+       Store[newx][newy] = new_element;
+#else
       if (IS_EQUAL_OR_IN_GROUP(new_element, MOVE_ENTER_EL(element)))
       {
-#if USE_CHANGE_TO_TRIGGERED
        int move_leave_element = element_info[element].move_leave_element;
 
+       /* this makes it possible to leave the removed element again */
        Store[newx][newy] = (move_leave_element == EL_TRIGGER_ELEMENT ?
                             new_element : move_leave_element);
-#else
-       Store[newx][newy] = element_info[element].move_leave_element;
-#endif
       }
+#endif
 
       if (move_pattern & MV_MAZE_RUNNER_STYLE)
       {
@@ -5368,7 +7780,7 @@ void StartMoving(int x, int y)
        DrawLevelElementAnimation(x, y, element);
 
       if (DONT_TOUCH(element))
-       TestIfBadThingTouchesHero(x, y);
+       TestIfBadThingTouchesPlayer(x, y);
 
       return;
     }
@@ -5382,20 +7794,16 @@ void StartMoving(int x, int y)
     ContinueMoving(x, y);
 }
 
-/* (emacs is confused here for some reason; this makes it happy again ;-) ) */
-void dummy()
-{
-}
-
 void ContinueMoving(int x, int y)
 {
   int element = Feld[x][y];
-  int stored = Store[x][y];
   struct ElementInfo *ei = &element_info[element];
   int direction = MovDir[x][y];
   int dx = (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
   int dy = (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
   int newx = x + dx, newy = y + dy;
+  int stored = Store[x][y];
+  int stored_new = Store[newx][newy];
   boolean pushed_by_player   = (Pushed[x][y] && IS_PLAYER(x, y));
   boolean pushed_by_conveyor = (Pushed[x][y] && !IS_PLAYER(x, y));
   boolean last_line = (newy == lev_fieldy - 1);
@@ -5407,6 +7815,17 @@ void ContinueMoving(int x, int y)
 
   if (ABS(MovPos[x][y]) < TILEX)
   {
+#if 0
+    int ee = Feld[x][y];
+    int gg = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+    int ff = getGraphicAnimationFrame(gg, GfxFrame[x][y]);
+
+    printf("::: %d.%d: moving %d ... [%d, %d, %d] [%d, %d, %d]\n",
+          x, y, ABS(MovPos[x][y]),
+          ee, gg, ff,
+          GfxAction[x][y], GfxDir[x][y], GfxFrame[x][y]);
+#endif
+
     DrawLevelField(x, y);
 
     return;    /* element is still moving */
@@ -5438,6 +7857,16 @@ void ContinueMoving(int x, int y)
     Feld[x][y] = get_next_element(element);
     element = Feld[newx][newy] = Store[x][y];
   }
+  else if (element == EL_QUICKSAND_FAST_FILLING)
+  {
+    element = Feld[newx][newy] = get_next_element(element);
+    Store[newx][newy] = Store[x][y];
+  }
+  else if (element == EL_QUICKSAND_FAST_EMPTYING)
+  {
+    Feld[x][y] = get_next_element(element);
+    element = Feld[newx][newy] = Store[x][y];
+  }
   else if (element == EL_MAGIC_WALL_FILLING)
   {
     element = Feld[newx][newy] = get_next_element(element);
@@ -5445,26 +7874,52 @@ void ContinueMoving(int x, int y)
       element = Feld[newx][newy] = EL_MAGIC_WALL_DEAD;
     Store[newx][newy] = Store[x][y];
   }
-  else if (element == EL_MAGIC_WALL_EMPTYING)
+  else if (element == EL_MAGIC_WALL_EMPTYING)
+  {
+    Feld[x][y] = get_next_element(element);
+    if (!game.magic_wall_active)
+      Feld[x][y] = EL_MAGIC_WALL_DEAD;
+    element = Feld[newx][newy] = Store[x][y];
+
+#if USE_NEW_CUSTOM_VALUE
+    InitField(newx, newy, FALSE);
+#endif
+  }
+  else if (element == EL_BD_MAGIC_WALL_FILLING)
+  {
+    element = Feld[newx][newy] = get_next_element(element);
+    if (!game.magic_wall_active)
+      element = Feld[newx][newy] = EL_BD_MAGIC_WALL_DEAD;
+    Store[newx][newy] = Store[x][y];
+  }
+  else if (element == EL_BD_MAGIC_WALL_EMPTYING)
   {
     Feld[x][y] = get_next_element(element);
     if (!game.magic_wall_active)
-      Feld[x][y] = EL_MAGIC_WALL_DEAD;
+      Feld[x][y] = EL_BD_MAGIC_WALL_DEAD;
     element = Feld[newx][newy] = Store[x][y];
+
+#if USE_NEW_CUSTOM_VALUE
+    InitField(newx, newy, FALSE);
+#endif
   }
-  else if (element == EL_BD_MAGIC_WALL_FILLING)
+  else if (element == EL_DC_MAGIC_WALL_FILLING)
   {
     element = Feld[newx][newy] = get_next_element(element);
     if (!game.magic_wall_active)
-      element = Feld[newx][newy] = EL_BD_MAGIC_WALL_DEAD;
+      element = Feld[newx][newy] = EL_DC_MAGIC_WALL_DEAD;
     Store[newx][newy] = Store[x][y];
   }
-  else if (element == EL_BD_MAGIC_WALL_EMPTYING)
+  else if (element == EL_DC_MAGIC_WALL_EMPTYING)
   {
     Feld[x][y] = get_next_element(element);
     if (!game.magic_wall_active)
-      Feld[x][y] = EL_BD_MAGIC_WALL_DEAD;
+      Feld[x][y] = EL_DC_MAGIC_WALL_DEAD;
     element = Feld[newx][newy] = Store[x][y];
+
+#if USE_NEW_CUSTOM_VALUE
+    InitField(newx, newy, FALSE);
+#endif
   }
   else if (element == EL_AMOEBA_DROPPING)
   {
@@ -5486,22 +7941,31 @@ void ContinueMoving(int x, int y)
   MovPos[x][y] = 0;
   MovDir[x][y] = 0;
   MovDelay[x][y] = 0;
+
   MovDelay[newx][newy] = 0;
 
-  if (CAN_CHANGE(element))
+  if (CAN_CHANGE_OR_HAS_ACTION(element))
   {
     /* copy element change control values to new field */
     ChangeDelay[newx][newy] = ChangeDelay[x][y];
     ChangePage[newx][newy]  = ChangePage[x][y];
-    Changed[newx][newy]     = Changed[x][y];
+    ChangeCount[newx][newy] = ChangeCount[x][y];
     ChangeEvent[newx][newy] = ChangeEvent[x][y];
   }
 
+#if USE_NEW_CUSTOM_VALUE
+    CustomValue[newx][newy] = CustomValue[x][y];
+#endif
+
   ChangeDelay[x][y] = 0;
   ChangePage[x][y] = -1;
-  Changed[x][y] = FALSE;
+  ChangeCount[x][y] = 0;
   ChangeEvent[x][y] = -1;
 
+#if USE_NEW_CUSTOM_VALUE
+  CustomValue[x][y] = 0;
+#endif
+
   /* copy animation control values to new field */
   GfxFrame[newx][newy]  = GfxFrame[x][y];
   GfxRandom[newx][newy] = GfxRandom[x][y];     /* keep same random value */
@@ -5511,13 +7975,30 @@ void ContinueMoving(int x, int y)
   Pushed[x][y] = Pushed[newx][newy] = FALSE;
 
   /* some elements can leave other elements behind after moving */
+#if 1
+  if (ei->move_leave_element != EL_EMPTY &&
+      (ei->move_leave_type == LEAVE_TYPE_UNLIMITED || stored != EL_EMPTY) &&
+      (!IS_PLAYER(x, y) || IS_WALKABLE(ei->move_leave_element)))
+#else
   if (IS_CUSTOM_ELEMENT(element) && ei->move_leave_element != EL_EMPTY &&
       (ei->move_leave_type == LEAVE_TYPE_UNLIMITED || stored != EL_EMPTY) &&
       (!IS_PLAYER(x, y) || IS_WALKABLE(ei->move_leave_element)))
+#endif
   {
     int move_leave_element = ei->move_leave_element;
 
-#if USE_CHANGE_TO_TRIGGERED
+#if 1
+#if 1
+    /* this makes it possible to leave the removed element again */
+    if (ei->move_leave_element == EL_TRIGGER_ELEMENT)
+      move_leave_element = (stored == EL_ACID ? EL_EMPTY : stored);
+#else
+    /* this makes it possible to leave the removed element again */
+    if (ei->move_leave_element == EL_TRIGGER_ELEMENT)
+      move_leave_element = stored;
+#endif
+#else
+    /* this makes it possible to leave the removed element again */
     if (ei->move_leave_type == LEAVE_TYPE_LIMITED &&
         ei->move_leave_element == EL_TRIGGER_ELEMENT)
       move_leave_element = stored;
@@ -5525,10 +8006,8 @@ void ContinueMoving(int x, int y)
 
     Feld[x][y] = move_leave_element;
 
-#if USE_PREVIOUS_MOVE_DIR
     if (element_info[Feld[x][y]].move_direction_initial == MV_START_PREVIOUS)
       MovDir[x][y] = direction;
-#endif
 
     InitField(x, y, FALSE);
 
@@ -5570,18 +8049,23 @@ void ContinueMoving(int x, int y)
     int nextx = newx + dx, nexty = newy + dy;
     boolean check_collision_again = IN_LEV_FIELD_AND_IS_FREE(nextx, nexty);
 
-    WasJustMoving[newx][newy] = 3;
+    WasJustMoving[newx][newy] = CHECK_DELAY_MOVING;
 
     if (CAN_FALL(element) && direction == MV_DOWN)
-      WasJustFalling[newx][newy] = 3;
+      WasJustFalling[newx][newy] = CHECK_DELAY_FALLING;
 
     if ((!CAN_FALL(element) || direction == MV_DOWN) && check_collision_again)
-      CheckCollision[newx][newy] = 2;
+      CheckCollision[newx][newy] = CHECK_DELAY_COLLISION;
+
+#if USE_FIX_IMPACT_COLLISION
+    if (CAN_FALL(element) && direction == MV_DOWN && check_collision_again)
+      CheckImpact[newx][newy] = CHECK_DELAY_IMPACT;
+#endif
   }
 
   if (DONT_TOUCH(element))     /* object may be nasty to player or others */
   {
-    TestIfBadThingTouchesHero(newx, newy);
+    TestIfBadThingTouchesPlayer(newx, newy);
     TestIfBadThingTouchesFriend(newx, newy);
 
     if (!IS_CUSTOM_ELEMENT(element))
@@ -5590,40 +8074,61 @@ void ContinueMoving(int x, int y)
   else if (element == EL_PENGUIN)
     TestIfFriendTouchesBadThing(newx, newy);
 
-#if USE_NEW_MOVE_STYLE
   /* give the player one last chance (one more frame) to move away */
   if (CAN_FALL(element) && direction == MV_DOWN &&
       (last_line || (!IS_FREE(x, newy + 1) &&
                     (!IS_PLAYER(x, newy + 1) ||
                      game.engine_version < VERSION_IDENT(3,1,1,0)))))
     Impact(x, newy);
-#else
-  if (CAN_FALL(element) && direction == MV_DOWN &&
-      (last_line || !IS_FREE(x, newy + 1)))
-    Impact(x, newy);
-#endif
 
-#if USE_PUSH_BUGFIX
   if (pushed_by_player && !game.use_change_when_pushing_bug)
-#else
-  if (pushed_by_player)
-#endif
-
   {
-    int dig_side = MV_DIR_OPPOSITE(direction);
+    int push_side = MV_DIR_OPPOSITE(direction);
     struct PlayerInfo *player = PLAYERINFO(x, y);
 
     CheckElementChangeByPlayer(newx, newy, element, CE_PUSHED_BY_PLAYER,
-                              player->index_bit, dig_side);
+                              player->index_bit, push_side);
     CheckTriggeredElementChangeByPlayer(newx,newy, element, CE_PLAYER_PUSHES_X,
-                                       player->index_bit, dig_side);
+                                       player->index_bit, push_side);
   }
 
+  if (element == EL_EMC_ANDROID && pushed_by_player)   /* make another move */
+    MovDelay[newx][newy] = 1;
+
+  CheckTriggeredElementChangeBySide(x, y, element, CE_MOVE_OF_X, direction);
+
   TestIfElementTouchesCustomElement(x, y);     /* empty or new element */
 
+#if 0
+  if (ChangePage[newx][newy] != -1)            /* delayed change */
+  {
+    int page = ChangePage[newx][newy];
+    struct ElementChangeInfo *change = &ei->change_page[page];
+
+    ChangePage[newx][newy] = -1;
+
+    if (change->can_change)
+    {
+      if (ChangeElement(newx, newy, element, page))
+      {
+        if (change->post_change_function)
+          change->post_change_function(newx, newy);
+      }
+    }
+
+    if (change->has_action)
+      ExecuteCustomElementAction(newx, newy, element, page);
+  }
+#endif
+
   TestIfElementHitsCustomElement(newx, newy, direction);
   TestIfPlayerTouchesCustomElement(newx, newy);
   TestIfElementTouchesCustomElement(newx, newy);
+
+  if (IS_CUSTOM_ELEMENT(element) && ei->move_enter_element != EL_EMPTY &&
+      IS_EQUAL_OR_IN_GROUP(stored_new, ei->move_enter_element))
+    CheckElementChangeBySide(newx, newy, element, stored_new, CE_DIGGING_X,
+                            MV_DIR_OPPOSITE(direction));
 }
 
 int AmoebeNachbarNr(int ax, int ay)
@@ -5692,13 +8197,10 @@ void AmoebenVereinigen(int ax, int ay)
       AmoebaCnt2[new_group_nr] += AmoebaCnt2[old_group_nr];
       AmoebaCnt2[old_group_nr] = 0;
 
-      for (yy = 0; yy < lev_fieldy; yy++)
+      SCAN_PLAYFIELD(xx, yy)
       {
-       for (xx = 0; xx < lev_fieldx; xx++)
-       {
-         if (AmoebaNr[xx][yy] == old_group_nr)
-           AmoebaNr[xx][yy] = new_group_nr;
-       }
+       if (AmoebaNr[xx][yy] == old_group_nr)
+         AmoebaNr[xx][yy] = new_group_nr;
       }
     }
   }
@@ -5721,17 +8223,15 @@ void AmoebeUmwandeln(int ax, int ay)
     }
 #endif
 
-    for (y = 0; y < lev_fieldy; y++)
+    SCAN_PLAYFIELD(x, y)
     {
-      for (x = 0; x < lev_fieldx; x++)
+      if (Feld[x][y] == EL_AMOEBA_DEAD && AmoebaNr[x][y] == group_nr)
       {
-       if (Feld[x][y] == EL_AMOEBA_DEAD && AmoebaNr[x][y] == group_nr)
-       {
-         AmoebaNr[x][y] = 0;
-         Feld[x][y] = EL_AMOEBA_TO_DIAMOND;
-       }
+       AmoebaNr[x][y] = 0;
+       Feld[x][y] = EL_AMOEBA_TO_DIAMOND;
       }
     }
+
     PlayLevelSound(ax, ay, (IS_GEM(level.amoeba_content) ?
                            SND_AMOEBA_TURNING_TO_GEM :
                            SND_AMOEBA_TURNING_TO_ROCK));
@@ -5781,21 +8281,18 @@ void AmoebeUmwandelnBD(int ax, int ay, int new_element)
   }
 #endif
 
-  for (y = 0; y < lev_fieldy; y++)
+  SCAN_PLAYFIELD(x, y)
   {
-    for (x = 0; x < lev_fieldx; x++)
+    if (AmoebaNr[x][y] == group_nr &&
+       (Feld[x][y] == EL_AMOEBA_DEAD ||
+        Feld[x][y] == EL_BD_AMOEBA ||
+        Feld[x][y] == EL_AMOEBA_GROWING))
     {
-      if (AmoebaNr[x][y] == group_nr &&
-         (Feld[x][y] == EL_AMOEBA_DEAD ||
-          Feld[x][y] == EL_BD_AMOEBA ||
-          Feld[x][y] == EL_AMOEBA_GROWING))
-      {
-       AmoebaNr[x][y] = 0;
-       Feld[x][y] = new_element;
-       InitField(x, y, FALSE);
-       DrawLevelField(x, y);
-       done = TRUE;
-      }
+      AmoebaNr[x][y] = 0;
+      Feld[x][y] = new_element;
+      InitField(x, y, FALSE);
+      DrawLevelField(x, y);
+      done = TRUE;
     }
   }
 
@@ -5883,6 +8380,7 @@ void AmoebeAbleger(int ax, int ay)
   int element = Feld[ax][ay];
   int graphic = el2img(element);
   int newax = ax, neway = ay;
+  boolean can_drop = (element == EL_AMOEBA_WET || element == EL_EMC_DRIPPER);
   static int xy[4][2] =
   {
     { 0, -1 },
@@ -5891,7 +8389,7 @@ void AmoebeAbleger(int ax, int ay)
     { 0, +1 }
   };
 
-  if (!level.amoeba_speed)
+  if (!level.amoeba_speed && element != EL_EMC_DRIPPER)
   {
     Feld[ax][ay] = EL_AMOEBA_DEAD;
     DrawLevelField(ax, ay);
@@ -5911,7 +8409,7 @@ void AmoebeAbleger(int ax, int ay)
       return;
   }
 
-  if (element == EL_AMOEBA_WET)        /* object is an acid / amoeba drop */
+  if (can_drop)                        /* EL_AMOEBA_WET or EL_EMC_DRIPPER */
   {
     int start = RND(4);
     int x = ax + xy[start][0];
@@ -5922,7 +8420,8 @@ void AmoebeAbleger(int ax, int ay)
 
     if (IS_FREE(x, y) ||
        CAN_GROW_INTO(Feld[x][y]) ||
-       Feld[x][y] == EL_QUICKSAND_EMPTY)
+       Feld[x][y] == EL_QUICKSAND_EMPTY ||
+       Feld[x][y] == EL_QUICKSAND_FAST_EMPTY)
     {
       newax = x;
       neway = y;
@@ -5947,7 +8446,8 @@ void AmoebeAbleger(int ax, int ay)
 
       if (IS_FREE(x, y) ||
          CAN_GROW_INTO(Feld[x][y]) ||
-         Feld[x][y] == EL_QUICKSAND_EMPTY)
+         Feld[x][y] == EL_QUICKSAND_EMPTY ||
+         Feld[x][y] == EL_QUICKSAND_FAST_EMPTY)
       {
        newax = x;
        neway = y;
@@ -6005,13 +8505,13 @@ void AmoebeAbleger(int ax, int ay)
     }
   }
 
-  if (element != EL_AMOEBA_WET || neway < ay || !IS_FREE(newax, neway) ||
+  if (!can_drop || neway < ay || !IS_FREE(newax, neway) ||
       (neway == lev_fieldy - 1 && newax != ax))
   {
     Feld[newax][neway] = EL_AMOEBA_GROWING;    /* creation of new amoeba */
     Store[newax][neway] = element;
   }
-  else if (neway == ay)
+  else if (neway == ay || element == EL_EMC_DRIPPER)
   {
     Feld[newax][neway] = EL_AMOEBA_DROP;       /* drop left/right of amoeba */
 
@@ -6032,10 +8532,11 @@ void AmoebeAbleger(int ax, int ay)
 void Life(int ax, int ay)
 {
   int x1, y1, x2, y2;
-  static int life[4] = { 2, 3, 3, 3 }; /* parameters for "game of life" */
   int life_time = 40;
   int element = Feld[ax][ay];
   int graphic = el2img(element);
+  int *life_parameter = (element == EL_GAME_OF_LIFE ? level.game_of_life :
+                        level.biomaze);
   boolean changed = FALSE;
 
   if (IS_ANIMATED(graphic))
@@ -6078,7 +8579,8 @@ void Life(int ax, int ay)
 
     if (xx == ax && yy == ay)          /* field in the middle */
     {
-      if (nachbarn < life[0] || nachbarn > life[1])
+      if (nachbarn < life_parameter[0] ||
+         nachbarn > life_parameter[1])
       {
        Feld[xx][yy] = EL_EMPTY;
        if (!Stop[xx][yy])
@@ -6089,7 +8591,8 @@ void Life(int ax, int ay)
     }
     else if (IS_FREE(xx, yy) || CAN_GROW_INTO(Feld[xx][yy]))
     {                                  /* free border field */
-      if (nachbarn >= life[2] && nachbarn <= life[3])
+      if (nachbarn >= life_parameter[2] &&
+         nachbarn <= life_parameter[3])
       {
        Feld[xx][yy] = element;
        MovDelay[xx][yy] = (element == EL_GAME_OF_LIFE ? 0 : life_time-1);
@@ -6129,7 +8632,48 @@ static void InitTimegateWheel(int x, int y)
 
 static void RunTimegateWheel(int x, int y)
 {
-  PlayLevelSound(x, y, SND_TIMEGATE_SWITCH_ACTIVE);
+  PlayLevelSound(x, y, SND_CLASS_TIMEGATE_SWITCH_ACTIVE);
+}
+
+static void InitMagicBallDelay(int x, int y)
+{
+#if 1
+  ChangeDelay[x][y] = (level.ball_time + 1) * 8 + 1;
+#else
+  ChangeDelay[x][y] = level.ball_time * FRAMES_PER_SECOND + 1;
+#endif
+}
+
+static void ActivateMagicBall(int bx, int by)
+{
+  int x, y;
+
+  if (level.ball_random)
+  {
+    int pos_border = RND(8);   /* select one of the eight border elements */
+    int pos_content = (pos_border > 3 ? pos_border + 1 : pos_border);
+    int xx = pos_content % 3;
+    int yy = pos_content / 3;
+
+    x = bx - 1 + xx;
+    y = by - 1 + yy;
+
+    if (IN_LEV_FIELD(x, y) && Feld[x][y] == EL_EMPTY)
+      CreateField(x, y, level.ball_content[game.ball_content_nr].e[xx][yy]);
+  }
+  else
+  {
+    for (y = by - 1; y <= by + 1; y++) for (x = bx - 1; x <= bx + 1; x++)
+    {
+      int xx = x - bx + 1;
+      int yy = y - by + 1;
+
+      if (IN_LEV_FIELD(x, y) && Feld[x][y] == EL_EMPTY)
+       CreateField(x, y, level.ball_content[game.ball_content_nr].e[xx][yy]);
+    }
+  }
+
+  game.ball_content_nr = (game.ball_content_nr + 1) % level.num_ball_contents;
 }
 
 void CheckExit(int x, int y)
@@ -6155,6 +8699,75 @@ void CheckExit(int x, int y)
   PlayLevelSoundNearest(x, y, SND_CLASS_EXIT_OPENING);
 }
 
+void CheckExitEM(int x, int y)
+{
+  if (local_player->gems_still_needed > 0 ||
+      local_player->sokobanfields_still_needed > 0 ||
+      local_player->lights_still_needed > 0)
+  {
+    int element = Feld[x][y];
+    int graphic = el2img(element);
+
+    if (IS_ANIMATED(graphic))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+    return;
+  }
+
+  if (AllPlayersGone)  /* do not re-open exit door closed after last player */
+    return;
+
+  Feld[x][y] = EL_EM_EXIT_OPENING;
+
+  PlayLevelSoundNearest(x, y, SND_CLASS_EM_EXIT_OPENING);
+}
+
+void CheckExitSteel(int x, int y)
+{
+  if (local_player->gems_still_needed > 0 ||
+      local_player->sokobanfields_still_needed > 0 ||
+      local_player->lights_still_needed > 0)
+  {
+    int element = Feld[x][y];
+    int graphic = el2img(element);
+
+    if (IS_ANIMATED(graphic))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+    return;
+  }
+
+  if (AllPlayersGone)  /* do not re-open exit door closed after last player */
+    return;
+
+  Feld[x][y] = EL_STEEL_EXIT_OPENING;
+
+  PlayLevelSoundNearest(x, y, SND_CLASS_STEEL_EXIT_OPENING);
+}
+
+void CheckExitSteelEM(int x, int y)
+{
+  if (local_player->gems_still_needed > 0 ||
+      local_player->sokobanfields_still_needed > 0 ||
+      local_player->lights_still_needed > 0)
+  {
+    int element = Feld[x][y];
+    int graphic = el2img(element);
+
+    if (IS_ANIMATED(graphic))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+    return;
+  }
+
+  if (AllPlayersGone)  /* do not re-open exit door closed after last player */
+    return;
+
+  Feld[x][y] = EL_EM_STEEL_EXIT_OPENING;
+
+  PlayLevelSoundNearest(x, y, SND_CLASS_EM_STEEL_EXIT_OPENING);
+}
+
 void CheckExitSP(int x, int y)
 {
   if (local_player->gems_still_needed > 0)
@@ -6180,23 +8793,20 @@ static void CloseAllOpenTimegates()
 {
   int x, y;
 
-  for (y = 0; y < lev_fieldy; y++)
+  SCAN_PLAYFIELD(x, y)
   {
-    for (x = 0; x < lev_fieldx; x++)
-    {
-      int element = Feld[x][y];
+    int element = Feld[x][y];
 
-      if (element == EL_TIMEGATE_OPEN || element == EL_TIMEGATE_OPENING)
-      {
-       Feld[x][y] = EL_TIMEGATE_CLOSING;
+    if (element == EL_TIMEGATE_OPEN || element == EL_TIMEGATE_OPENING)
+    {
+      Feld[x][y] = EL_TIMEGATE_CLOSING;
 
-       PlayLevelSoundAction(x, y, ACTION_CLOSING);
-      }
+      PlayLevelSoundAction(x, y, ACTION_CLOSING);
     }
   }
 }
 
-void EdelsteinFunkeln(int x, int y)
+void DrawTwinkleOnField(int x, int y)
 {
   if (!IN_SCR_FIELD(SCREENX(x), SCREENY(y)) || IS_MOVING(x, y))
     return;
@@ -6205,7 +8815,7 @@ void EdelsteinFunkeln(int x, int y)
     return;
 
   if (MovDelay[x][y] == 0)     /* next animation frame */
-    MovDelay[x][y] = 11 * !SimpleRND(500);
+    MovDelay[x][y] = 11 * !GetSimpleRandom(500);
 
   if (MovDelay[x][y] != 0)     /* wait some time before next frame */
   {
@@ -6257,38 +8867,146 @@ void MauerWaechst(int x, int y)
       DrawGraphic(SCREENX(x), SCREENY(y), graphic, frame);
     }
 
-    if (!MovDelay[x][y])
+    if (!MovDelay[x][y])
+    {
+      if (MovDir[x][y] == MV_LEFT)
+      {
+       if (IN_LEV_FIELD(x - 1, y) && IS_WALL(Feld[x - 1][y]))
+         DrawLevelField(x - 1, y);
+      }
+      else if (MovDir[x][y] == MV_RIGHT)
+      {
+       if (IN_LEV_FIELD(x + 1, y) && IS_WALL(Feld[x + 1][y]))
+         DrawLevelField(x + 1, y);
+      }
+      else if (MovDir[x][y] == MV_UP)
+      {
+       if (IN_LEV_FIELD(x, y - 1) && IS_WALL(Feld[x][y - 1]))
+         DrawLevelField(x, y - 1);
+      }
+      else
+      {
+       if (IN_LEV_FIELD(x, y + 1) && IS_WALL(Feld[x][y + 1]))
+         DrawLevelField(x, y + 1);
+      }
+
+      Feld[x][y] = Store[x][y];
+      Store[x][y] = 0;
+      GfxDir[x][y] = MovDir[x][y] = MV_NONE;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void MauerAbleger(int ax, int ay)
+{
+  int element = Feld[ax][ay];
+  int graphic = el2img(element);
+  boolean oben_frei = FALSE, unten_frei = FALSE;
+  boolean links_frei = FALSE, rechts_frei = FALSE;
+  boolean oben_massiv = FALSE, unten_massiv = FALSE;
+  boolean links_massiv = FALSE, rechts_massiv = FALSE;
+  boolean new_wall = FALSE;
+
+  if (IS_ANIMATED(graphic))
+    DrawLevelGraphicAnimationIfNeeded(ax, ay, graphic);
+
+  if (!MovDelay[ax][ay])       /* start building new wall */
+    MovDelay[ax][ay] = 6;
+
+  if (MovDelay[ax][ay])                /* wait some time before building new wall */
+  {
+    MovDelay[ax][ay]--;
+    if (MovDelay[ax][ay])
+      return;
+  }
+
+  if (IN_LEV_FIELD(ax, ay-1) && IS_FREE(ax, ay-1))
+    oben_frei = TRUE;
+  if (IN_LEV_FIELD(ax, ay+1) && IS_FREE(ax, ay+1))
+    unten_frei = TRUE;
+  if (IN_LEV_FIELD(ax-1, ay) && IS_FREE(ax-1, ay))
+    links_frei = TRUE;
+  if (IN_LEV_FIELD(ax+1, ay) && IS_FREE(ax+1, ay))
+    rechts_frei = TRUE;
+
+  if (element == EL_EXPANDABLE_WALL_VERTICAL ||
+      element == EL_EXPANDABLE_WALL_ANY)
+  {
+    if (oben_frei)
+    {
+      Feld[ax][ay-1] = EL_EXPANDABLE_WALL_GROWING;
+      Store[ax][ay-1] = element;
+      GfxDir[ax][ay-1] = MovDir[ax][ay-1] = MV_UP;
+      if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay-1)))
+       DrawGraphic(SCREENX(ax), SCREENY(ay - 1),
+                   IMG_EXPANDABLE_WALL_GROWING_UP, 0);
+      new_wall = TRUE;
+    }
+    if (unten_frei)
+    {
+      Feld[ax][ay+1] = EL_EXPANDABLE_WALL_GROWING;
+      Store[ax][ay+1] = element;
+      GfxDir[ax][ay+1] = MovDir[ax][ay+1] = MV_DOWN;
+      if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay+1)))
+       DrawGraphic(SCREENX(ax), SCREENY(ay + 1),
+                   IMG_EXPANDABLE_WALL_GROWING_DOWN, 0);
+      new_wall = TRUE;
+    }
+  }
+
+  if (element == EL_EXPANDABLE_WALL_HORIZONTAL ||
+      element == EL_EXPANDABLE_WALL_ANY ||
+      element == EL_EXPANDABLE_WALL ||
+      element == EL_BD_EXPANDABLE_WALL)
+  {
+    if (links_frei)
+    {
+      Feld[ax-1][ay] = EL_EXPANDABLE_WALL_GROWING;
+      Store[ax-1][ay] = element;
+      GfxDir[ax-1][ay] = MovDir[ax-1][ay] = MV_LEFT;
+      if (IN_SCR_FIELD(SCREENX(ax-1), SCREENY(ay)))
+       DrawGraphic(SCREENX(ax - 1), SCREENY(ay),
+                   IMG_EXPANDABLE_WALL_GROWING_LEFT, 0);
+      new_wall = TRUE;
+    }
+
+    if (rechts_frei)
     {
-      if (MovDir[x][y] == MV_LEFT)
-      {
-       if (IN_LEV_FIELD(x - 1, y) && IS_WALL(Feld[x - 1][y]))
-         DrawLevelField(x - 1, y);
-      }
-      else if (MovDir[x][y] == MV_RIGHT)
-      {
-       if (IN_LEV_FIELD(x + 1, y) && IS_WALL(Feld[x + 1][y]))
-         DrawLevelField(x + 1, y);
-      }
-      else if (MovDir[x][y] == MV_UP)
-      {
-       if (IN_LEV_FIELD(x, y - 1) && IS_WALL(Feld[x][y - 1]))
-         DrawLevelField(x, y - 1);
-      }
-      else
-      {
-       if (IN_LEV_FIELD(x, y + 1) && IS_WALL(Feld[x][y + 1]))
-         DrawLevelField(x, y + 1);
-      }
-
-      Feld[x][y] = Store[x][y];
-      Store[x][y] = 0;
-      GfxDir[x][y] = MovDir[x][y] = MV_NO_MOVING;
-      DrawLevelField(x, y);
+      Feld[ax+1][ay] = EL_EXPANDABLE_WALL_GROWING;
+      Store[ax+1][ay] = element;
+      GfxDir[ax+1][ay] = MovDir[ax+1][ay] = MV_RIGHT;
+      if (IN_SCR_FIELD(SCREENX(ax+1), SCREENY(ay)))
+       DrawGraphic(SCREENX(ax + 1), SCREENY(ay),
+                   IMG_EXPANDABLE_WALL_GROWING_RIGHT, 0);
+      new_wall = TRUE;
     }
   }
+
+  if (element == EL_EXPANDABLE_WALL && (links_frei || rechts_frei))
+    DrawLevelField(ax, ay);
+
+  if (!IN_LEV_FIELD(ax, ay-1) || IS_WALL(Feld[ax][ay-1]))
+    oben_massiv = TRUE;
+  if (!IN_LEV_FIELD(ax, ay+1) || IS_WALL(Feld[ax][ay+1]))
+    unten_massiv = TRUE;
+  if (!IN_LEV_FIELD(ax-1, ay) || IS_WALL(Feld[ax-1][ay]))
+    links_massiv = TRUE;
+  if (!IN_LEV_FIELD(ax+1, ay) || IS_WALL(Feld[ax+1][ay]))
+    rechts_massiv = TRUE;
+
+  if (((oben_massiv && unten_massiv) ||
+       element == EL_EXPANDABLE_WALL_HORIZONTAL ||
+       element == EL_EXPANDABLE_WALL) &&
+      ((links_massiv && rechts_massiv) ||
+       element == EL_EXPANDABLE_WALL_VERTICAL))
+    Feld[ax][ay] = EL_WALL;
+
+  if (new_wall)
+    PlayLevelSoundAction(ax, ay, ACTION_GROWING);
 }
 
-void MauerAbleger(int ax, int ay)
+void MauerAblegerStahl(int ax, int ay)
 {
   int element = Feld[ax][ay];
   int graphic = el2img(element);
@@ -6320,61 +9038,57 @@ void MauerAbleger(int ax, int ay)
   if (IN_LEV_FIELD(ax+1, ay) && IS_FREE(ax+1, ay))
     rechts_frei = TRUE;
 
-  if (element == EL_EXPANDABLE_WALL_VERTICAL ||
-      element == EL_EXPANDABLE_WALL_ANY)
+  if (element == EL_EXPANDABLE_STEELWALL_VERTICAL ||
+      element == EL_EXPANDABLE_STEELWALL_ANY)
   {
     if (oben_frei)
     {
-      Feld[ax][ay-1] = EL_EXPANDABLE_WALL_GROWING;
+      Feld[ax][ay-1] = EL_EXPANDABLE_STEELWALL_GROWING;
       Store[ax][ay-1] = element;
       GfxDir[ax][ay-1] = MovDir[ax][ay-1] = MV_UP;
       if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay-1)))
        DrawGraphic(SCREENX(ax), SCREENY(ay - 1),
-                   IMG_EXPANDABLE_WALL_GROWING_UP, 0);
+                   IMG_EXPANDABLE_STEELWALL_GROWING_UP, 0);
       new_wall = TRUE;
     }
     if (unten_frei)
     {
-      Feld[ax][ay+1] = EL_EXPANDABLE_WALL_GROWING;
+      Feld[ax][ay+1] = EL_EXPANDABLE_STEELWALL_GROWING;
       Store[ax][ay+1] = element;
       GfxDir[ax][ay+1] = MovDir[ax][ay+1] = MV_DOWN;
       if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay+1)))
        DrawGraphic(SCREENX(ax), SCREENY(ay + 1),
-                   IMG_EXPANDABLE_WALL_GROWING_DOWN, 0);
+                   IMG_EXPANDABLE_STEELWALL_GROWING_DOWN, 0);
       new_wall = TRUE;
     }
   }
 
-  if (element == EL_EXPANDABLE_WALL_HORIZONTAL ||
-      element == EL_EXPANDABLE_WALL_ANY ||
-      element == EL_EXPANDABLE_WALL)
+  if (element == EL_EXPANDABLE_STEELWALL_HORIZONTAL ||
+      element == EL_EXPANDABLE_STEELWALL_ANY)
   {
     if (links_frei)
     {
-      Feld[ax-1][ay] = EL_EXPANDABLE_WALL_GROWING;
+      Feld[ax-1][ay] = EL_EXPANDABLE_STEELWALL_GROWING;
       Store[ax-1][ay] = element;
       GfxDir[ax-1][ay] = MovDir[ax-1][ay] = MV_LEFT;
       if (IN_SCR_FIELD(SCREENX(ax-1), SCREENY(ay)))
        DrawGraphic(SCREENX(ax - 1), SCREENY(ay),
-                   IMG_EXPANDABLE_WALL_GROWING_LEFT, 0);
+                   IMG_EXPANDABLE_STEELWALL_GROWING_LEFT, 0);
       new_wall = TRUE;
     }
 
     if (rechts_frei)
     {
-      Feld[ax+1][ay] = EL_EXPANDABLE_WALL_GROWING;
+      Feld[ax+1][ay] = EL_EXPANDABLE_STEELWALL_GROWING;
       Store[ax+1][ay] = element;
       GfxDir[ax+1][ay] = MovDir[ax+1][ay] = MV_RIGHT;
       if (IN_SCR_FIELD(SCREENX(ax+1), SCREENY(ay)))
        DrawGraphic(SCREENX(ax + 1), SCREENY(ay),
-                   IMG_EXPANDABLE_WALL_GROWING_RIGHT, 0);
+                   IMG_EXPANDABLE_STEELWALL_GROWING_RIGHT, 0);
       new_wall = TRUE;
     }
   }
 
-  if (element == EL_EXPANDABLE_WALL && (links_frei || rechts_frei))
-    DrawLevelField(ax, ay);
-
   if (!IN_LEV_FIELD(ax, ay-1) || IS_WALL(Feld[ax][ay-1]))
     oben_massiv = TRUE;
   if (!IN_LEV_FIELD(ax, ay+1) || IS_WALL(Feld[ax][ay+1]))
@@ -6385,10 +9099,9 @@ void MauerAbleger(int ax, int ay)
     rechts_massiv = TRUE;
 
   if (((oben_massiv && unten_massiv) ||
-       element == EL_EXPANDABLE_WALL_HORIZONTAL ||
-       element == EL_EXPANDABLE_WALL) &&
+       element == EL_EXPANDABLE_STEELWALL_HORIZONTAL) &&
       ((links_massiv && rechts_massiv) ||
-       element == EL_EXPANDABLE_WALL_VERTICAL))
+       element == EL_EXPANDABLE_STEELWALL_VERTICAL))
     Feld[ax][ay] = EL_WALL;
 
   if (new_wall)
@@ -6471,9 +9184,10 @@ static void WarnBuggyBase(int x, int y)
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0], yy = y + xy[i][1];
+    int xx = x + xy[i][0];
+    int yy = y + xy[i][1];
 
-    if (IS_PLAYER(xx, yy))
+    if (IN_LEV_FIELD(xx, yy) && IS_PLAYER(xx, yy))
     {
       PlayLevelSound(x, y, SND_SP_BUGGY_BASE_ACTIVE);
 
@@ -6508,14 +9222,15 @@ static int getSpecialActionElement(int element, int number, int base_element)
          EL_EMPTY);
 }
 
-static int getModifiedActionNumber(int value_old, int value_min, int value_max,
-                                  int operator, int operand)
+static int getModifiedActionNumber(int value_old, int operator, int operand,
+                                  int value_min, int value_max)
 {
-  int value_new = (operator == CA_MODE_ADD      ? value_old + operand :
+  int value_new = (operator == CA_MODE_SET      ? operand :
+                  operator == CA_MODE_ADD      ? value_old + operand :
                   operator == CA_MODE_SUBTRACT ? value_old - operand :
                   operator == CA_MODE_MULTIPLY ? value_old * operand :
                   operator == CA_MODE_DIVIDE   ? value_old / MAX(1, operand) :
-                  operator == CA_MODE_SET      ? operand :
+                  operator == CA_MODE_MODULO   ? value_old % MAX(1, operand) :
                   value_old);
 
   return (value_new < value_min ? value_min :
@@ -6523,10 +9238,11 @@ static int getModifiedActionNumber(int value_old, int value_min, int value_max,
          value_new);
 }
 
-static void ExecuteCustomElementAction(int element, int page)
+static void ExecuteCustomElementAction(int x, int y, int element, int page)
 {
   struct ElementInfo *ei = &element_info[element];
   struct ElementChangeInfo *change = &ei->change_page[page];
+  int target_element = change->target_element;
   int action_type = change->action_type;
   int action_mode = change->action_mode;
   int action_arg = change->action_arg;
@@ -6535,7 +9251,11 @@ static void ExecuteCustomElementAction(int element, int page)
   if (!change->has_action)
     return;
 
-  /* ---------- determine action paramater values ---------- */
+  /* ---------- determine action paramater values -------------------------- */
+
+  int level_time_value =
+    (level.time > 0 ? TimeLeft :
+     TimePlayed);
 
   int action_arg_element =
     (action_arg == CA_ARG_PLAYER_TRIGGER  ? change->actual_trigger_player :
@@ -6543,104 +9263,224 @@ static void ExecuteCustomElementAction(int element, int page)
      action_arg == CA_ARG_ELEMENT_TARGET  ? change->target_element :
      EL_EMPTY);
 
+  int action_arg_direction =
+    (action_arg >= CA_ARG_DIRECTION_LEFT &&
+     action_arg <= CA_ARG_DIRECTION_DOWN ? action_arg - CA_ARG_DIRECTION :
+     action_arg == CA_ARG_DIRECTION_TRIGGER ?
+     change->actual_trigger_side :
+     action_arg == CA_ARG_DIRECTION_TRIGGER_BACK ?
+     MV_DIR_OPPOSITE(change->actual_trigger_side) :
+     MV_NONE);
+
+  int action_arg_number_min =
+    (action_type == CA_SET_PLAYER_SPEED ? STEPSIZE_NOT_MOVING :
+     CA_ARG_MIN);
+
+  int action_arg_number_max =
+    (action_type == CA_SET_PLAYER_SPEED ? STEPSIZE_EVEN_FASTER :
+     action_type == CA_SET_LEVEL_GEMS ? 999 :
+     action_type == CA_SET_LEVEL_TIME ? 9999 :
+     action_type == CA_SET_LEVEL_SCORE ? 99999 :
+     action_type == CA_SET_CE_VALUE ? 9999 :
+     action_type == CA_SET_CE_SCORE ? 9999 :
+     CA_ARG_MAX);
+
+  int action_arg_number_reset =
+    (action_type == CA_SET_PLAYER_SPEED ? level.initial_player_stepsize[0] :
+     action_type == CA_SET_LEVEL_GEMS ? level.gems_needed :
+     action_type == CA_SET_LEVEL_TIME ? level.time :
+     action_type == CA_SET_LEVEL_SCORE ? 0 :
+#if USE_NEW_CUSTOM_VALUE
+     action_type == CA_SET_CE_VALUE ? GET_NEW_CE_VALUE(element) :
+#else
+     action_type == CA_SET_CE_VALUE ? ei->custom_value_initial :
+#endif
+     action_type == CA_SET_CE_SCORE ? 0 :
+     0);
+
   int action_arg_number =
     (action_arg <= CA_ARG_MAX ? action_arg :
-     action_arg == CA_ARG_NUMBER_MIN ? CA_ARG_MIN :
-     action_arg == CA_ARG_NUMBER_MAX ? CA_ARG_MAX :
+     action_arg >= CA_ARG_SPEED_NOT_MOVING &&
+     action_arg <= CA_ARG_SPEED_EVEN_FASTER ? (action_arg - CA_ARG_SPEED) :
+     action_arg == CA_ARG_SPEED_RESET ? action_arg_number_reset :
+     action_arg == CA_ARG_NUMBER_MIN ? action_arg_number_min :
+     action_arg == CA_ARG_NUMBER_MAX ? action_arg_number_max :
+     action_arg == CA_ARG_NUMBER_RESET ? action_arg_number_reset :
+#if USE_NEW_CUSTOM_VALUE
+     action_arg == CA_ARG_NUMBER_CE_VALUE ? CustomValue[x][y] :
+#else
+     action_arg == CA_ARG_NUMBER_CE_VALUE ? ei->custom_value_initial :
+#endif
      action_arg == CA_ARG_NUMBER_CE_SCORE ? ei->collect_score :
-     action_arg == CA_ARG_NUMBER_CE_COUNT ? ei->collect_count :
-     action_arg == CA_ARG_NUMBER_CE_DELAY ? GET_CHANGE_DELAY(change) :
+     action_arg == CA_ARG_NUMBER_CE_DELAY ? GET_CE_DELAY_VALUE(change) :
+     action_arg == CA_ARG_NUMBER_LEVEL_TIME ? level_time_value :
+     action_arg == CA_ARG_NUMBER_LEVEL_GEMS ? local_player->gems_still_needed :
+     action_arg == CA_ARG_NUMBER_LEVEL_SCORE ? local_player->score :
+     action_arg == CA_ARG_ELEMENT_CV_TARGET ? GET_NEW_CE_VALUE(target_element):
+     action_arg == CA_ARG_ELEMENT_CV_TRIGGER ? change->actual_trigger_ce_value:
+     action_arg == CA_ARG_ELEMENT_CS_TARGET ? GET_CE_SCORE(target_element) :
+     action_arg == CA_ARG_ELEMENT_CS_TRIGGER ? change->actual_trigger_ce_score:
+     action_arg == CA_ARG_ELEMENT_NR_TARGET  ? change->target_element :
+     action_arg == CA_ARG_ELEMENT_NR_TRIGGER ? change->actual_trigger_element :
      -1);
 
-  /* (for explicit player choice, set invalid value to "no player") */
-  int action_arg_player_bits =
-    (action_arg == CA_ARG_PLAYER_ANY ? action_arg - CA_ARG_PLAYER :
-     action_arg >= CA_ARG_PLAYER_1 &&
-     action_arg <= CA_ARG_PLAYER_4 ? action_arg - CA_ARG_PLAYER :
-     action_arg >= CA_ARG_1 &&
-     action_arg <= CA_ARG_PLAYER_4 ? (1 << (action_arg - 1)) :
-     action_arg_element >= EL_PLAYER_1 &&
-     action_arg_element <= EL_PLAYER_4 ?
-     (1 << (action_arg_element - EL_PLAYER_1)) :
+  int action_arg_number_old =
+    (action_type == CA_SET_LEVEL_GEMS ? local_player->gems_still_needed :
+     action_type == CA_SET_LEVEL_TIME ? TimeLeft :
+     action_type == CA_SET_LEVEL_SCORE ? local_player->score :
+     action_type == CA_SET_CE_VALUE ? CustomValue[x][y] :
+     action_type == CA_SET_CE_SCORE ? ei->collect_score :
      0);
 
-  /* (for implicit player choice, set invalid value to "all players") */
+  int action_arg_number_new =
+    getModifiedActionNumber(action_arg_number_old,
+                           action_mode, action_arg_number,
+                           action_arg_number_min, action_arg_number_max);
+
   int trigger_player_bits =
     (change->actual_trigger_player >= EL_PLAYER_1 &&
      change->actual_trigger_player <= EL_PLAYER_4 ?
      (1 << (change->actual_trigger_player - EL_PLAYER_1)) :
      PLAYER_BITS_ANY);
 
-  /* ---------- execute action  ---------- */
+  int action_arg_player_bits =
+    (action_arg >= CA_ARG_PLAYER_1 &&
+     action_arg <= CA_ARG_PLAYER_4 ? action_arg - CA_ARG_PLAYER :
+     action_arg == CA_ARG_PLAYER_TRIGGER ? trigger_player_bits :
+     PLAYER_BITS_ANY);
+
+  /* ---------- execute action  -------------------------------------------- */
 
-  switch(action_type)
+  switch (action_type)
   {
     case CA_NO_ACTION:
     {
       return;
     }
 
-    case CA_EXIT_PLAYER:
+    /* ---------- level actions  ------------------------------------------- */
+
+    case CA_RESTART_LEVEL:
     {
-      for (i = 0; i < MAX_PLAYERS; i++)
-       if (action_arg_player_bits & (1 << i))
-         stored_player[i].LevelSolved = stored_player[i].GameOver = TRUE;
+      game.restart_level = TRUE;
 
       break;
     }
 
-    case CA_KILL_PLAYER:
+    case CA_SHOW_ENVELOPE:
     {
-      for (i = 0; i < MAX_PLAYERS; i++)
-       if (action_arg_player_bits & (1 << i))
-         KillHero(&stored_player[i]);
+      int element = getSpecialActionElement(action_arg_element,
+                                           action_arg_number, EL_ENVELOPE_1);
+
+      if (IS_ENVELOPE(element))
+       local_player->show_envelope = element;
 
       break;
     }
 
-    case CA_RESTART_LEVEL:
+    case CA_SET_LEVEL_TIME:
     {
-      game.restart_level = TRUE;
+      if (level.time > 0)      /* only modify limited time value */
+      {
+       TimeLeft = action_arg_number_new;
+
+#if 1
+       game_control_value[GAME_CONTROL_TIME] = TimeLeft;
+
+       DisplayGameControlValues();
+#else
+       DrawGameValue_Time(TimeLeft);
+#endif
+
+       if (!TimeLeft && setup.time_limit)
+         for (i = 0; i < MAX_PLAYERS; i++)
+           KillPlayer(&stored_player[i]);
+      }
 
       break;
     }
 
-    case CA_SHOW_ENVELOPE:
+    case CA_SET_LEVEL_SCORE:
     {
-      int element = getSpecialActionElement(action_arg_element,
-                                           action_arg_number, EL_ENVELOPE_1);
+      local_player->score = action_arg_number_new;
 
-      if (IS_ENVELOPE(element))
-       local_player->show_envelope = element;
+#if 1
+      game_control_value[GAME_CONTROL_SCORE] = local_player->score;
+
+      DisplayGameControlValues();
+#else
+      DrawGameValue_Score(local_player->score);
+#endif
 
       break;
     }
 
-    case CA_ADD_KEY:
+    case CA_SET_LEVEL_GEMS:
     {
-      int element = getSpecialActionElement(action_arg_element,
-                                           action_arg_number, EL_KEY_1);
+      local_player->gems_still_needed = action_arg_number_new;
 
-      if (IS_KEY(element))
-      {
-       for (i = 0; i < MAX_PLAYERS; i++)
-       {
-         if (trigger_player_bits & (1 << i))
-         {
-           stored_player[i].key[KEY_NR(element)] = TRUE;
+#if 1
+      game_control_value[GAME_CONTROL_GEMS] = local_player->gems_still_needed;
 
-           DrawGameValue_Keys(stored_player[i].key);
+      DisplayGameControlValues();
+#else
+      DrawGameValue_Emeralds(local_player->gems_still_needed);
+#endif
 
-           redraw_mask |= REDRAW_DOOR_1;
-         }
-       }
-      }
+      break;
+    }
+
+#if !USE_PLAYER_GRAVITY
+    case CA_SET_LEVEL_GRAVITY:
+    {
+      game.gravity = (action_arg == CA_ARG_GRAVITY_OFF    ? FALSE         :
+                     action_arg == CA_ARG_GRAVITY_ON     ? TRUE          :
+                     action_arg == CA_ARG_GRAVITY_TOGGLE ? !game.gravity :
+                     game.gravity);
+      break;
+    }
+#endif
+
+    case CA_SET_LEVEL_WIND:
+    {
+      game.wind_direction = action_arg_direction;
+
+      break;
+    }
+
+    /* ---------- player actions  ------------------------------------------ */
+
+    case CA_MOVE_PLAYER:
+    {
+      /* automatically move to the next field in specified direction */
+      for (i = 0; i < MAX_PLAYERS; i++)
+       if (trigger_player_bits & (1 << i))
+         stored_player[i].programmed_action = action_arg_direction;
+
+      break;
+    }
+
+    case CA_EXIT_PLAYER:
+    {
+      for (i = 0; i < MAX_PLAYERS; i++)
+       if (action_arg_player_bits & (1 << i))
+         PlayerWins(&stored_player[i]);
+
+      break;
+    }
+
+    case CA_KILL_PLAYER:
+    {
+      for (i = 0; i < MAX_PLAYERS; i++)
+       if (action_arg_player_bits & (1 << i))
+         KillPlayer(&stored_player[i]);
 
       break;
     }
 
-    case CA_DEL_KEY:
+    case CA_SET_PLAYER_KEYS:
     {
+      int key_state = (action_mode == CA_MODE_ADD ? TRUE : FALSE);
       int element = getSpecialActionElement(action_arg_element,
                                            action_arg_number, EL_KEY_1);
 
@@ -6650,11 +9490,9 @@ static void ExecuteCustomElementAction(int element, int page)
        {
          if (trigger_player_bits & (1 << i))
          {
-           stored_player[i].key[KEY_NR(element)] = FALSE;
-
-           DrawGameValue_Keys(stored_player[i].key);
+           stored_player[i].key[KEY_NR(element)] = key_state;
 
-           redraw_mask |= REDRAW_DOOR_1;
+           DrawGameDoorValues();
          }
        }
       }
@@ -6668,131 +9506,192 @@ static void ExecuteCustomElementAction(int element, int page)
       {
        if (trigger_player_bits & (1 << i))
        {
-         if (action_arg == CA_ARG_NUMBER_RESET)
-           stored_player[i].move_delay_value = game.initial_move_delay_value;
-         else if (action_arg == CA_ARG_NUMBER_NORMAL)
-           stored_player[i].move_delay_value = MOVE_DELAY_NORMAL_SPEED;
-         else if (action_arg == CA_ARG_NUMBER_MIN)
-           stored_player[i].move_delay_value = 16;
-         else if (action_arg == CA_ARG_NUMBER_MAX)
-           stored_player[i].move_delay_value = MOVE_DELAY_HIGH_SPEED;
-         else
+         int move_stepsize = TILEX / stored_player[i].move_delay_value;
+
+         if (action_arg == CA_ARG_SPEED_FASTER &&
+             stored_player[i].cannot_move)
          {
-#if 0
-           if (action_mode == CA_MODE_ADD)
-           {
-             action_mode = CA_MODE_DIVIDE;
-             action_arg_number = (1 << action_arg_number);
-           }
-           else if (action_mode == CA_MODE_SUBTRACT)
-           {
-             action_mode = CA_MODE_MULTIPLY;
-             action_arg_number = (1 << action_arg_number);
-           }
+           action_arg_number = STEPSIZE_VERY_SLOW;
+         }
+         else if (action_arg == CA_ARG_SPEED_SLOWER ||
+                  action_arg == CA_ARG_SPEED_FASTER)
+         {
+           action_arg_number = 2;
+           action_mode = (action_arg == CA_ARG_SPEED_SLOWER ? CA_MODE_DIVIDE :
+                          CA_MODE_MULTIPLY);
+         }
+         else if (action_arg == CA_ARG_NUMBER_RESET)
+         {
+           action_arg_number = level.initial_player_stepsize[i];
+         }
 
-           int mode = (action_mode == CA_MODE_MULTIPLY ? CA_MODE_DIVIDE :
-                       action_mode == CA_MODE_DIVIDE   ? CA_MODE_MULTIPLY :
-                       action_mode);
+         move_stepsize =
+           getModifiedActionNumber(move_stepsize,
+                                   action_mode,
+                                   action_arg_number,
+                                   action_arg_number_min,
+                                   action_arg_number_max);
 
-           stored_player[i].move_delay_value =
-             getModifiedActionNumber(stored_player[i].move_delay_value,
-                                     1, 16,
-                                     action_mode, action_arg_number);
-#endif
-         }
+         SetPlayerMoveSpeed(&stored_player[i], move_stepsize, FALSE);
        }
       }
 
       break;
     }
 
-    case CA_SET_GEMS:
+    case CA_SET_PLAYER_SHIELD:
     {
-      local_player->gems_still_needed =
-       getModifiedActionNumber(local_player->gems_still_needed, 0, 999,
-                               action_mode, action_arg_number);
-
-      DrawGameValue_Emeralds(local_player->gems_still_needed);
+      for (i = 0; i < MAX_PLAYERS; i++)
+      {
+       if (trigger_player_bits & (1 << i))
+       {
+         if (action_arg == CA_ARG_SHIELD_OFF)
+         {
+           stored_player[i].shield_normal_time_left = 0;
+           stored_player[i].shield_deadly_time_left = 0;
+         }
+         else if (action_arg == CA_ARG_SHIELD_NORMAL)
+         {
+           stored_player[i].shield_normal_time_left = 999999;
+         }
+         else if (action_arg == CA_ARG_SHIELD_DEADLY)
+         {
+           stored_player[i].shield_normal_time_left = 999999;
+           stored_player[i].shield_deadly_time_left = 999999;
+         }
+       }
+      }
 
       break;
     }
 
-    case CA_SET_TIME:
+#if USE_PLAYER_GRAVITY
+    case CA_SET_PLAYER_GRAVITY:
     {
-      if (level.time > 0)      /* only modify limited time value */
+      for (i = 0; i < MAX_PLAYERS; i++)
       {
-       TimeLeft = getModifiedActionNumber(TimeLeft, 0, 9999,
-                                          action_mode, action_arg_number);
-
-       DrawGameValue_Time(TimeLeft);
+       if (trigger_player_bits & (1 << i))
+       {
+         stored_player[i].gravity =
+           (action_arg == CA_ARG_GRAVITY_OFF    ? FALSE                     :
+            action_arg == CA_ARG_GRAVITY_ON     ? TRUE                      :
+            action_arg == CA_ARG_GRAVITY_TOGGLE ? !stored_player[i].gravity :
+            stored_player[i].gravity);
+       }
       }
 
       break;
     }
+#endif
 
-    case CA_SET_SCORE:
+    case CA_SET_PLAYER_ARTWORK:
     {
-      local_player->score =
-       getModifiedActionNumber(local_player->score, 0, 99999,
-                               action_mode, action_arg_number);
+      for (i = 0; i < MAX_PLAYERS; i++)
+      {
+       if (trigger_player_bits & (1 << i))
+       {
+         int artwork_element = action_arg_element;
 
-      DrawGameValue_Score(local_player->score);
+         if (action_arg == CA_ARG_ELEMENT_RESET)
+           artwork_element =
+             (level.use_artwork_element[i] ? level.artwork_element[i] :
+              stored_player[i].element_nr);
 
-      break;
-    }
+#if USE_GFX_RESET_PLAYER_ARTWORK
+         if (stored_player[i].artwork_element != artwork_element)
+           stored_player[i].Frame = 0;
+#endif
 
-    case CA_SET_CE_SCORE:
-    {
-      printf("::: CA_SET_CE_SCORE -- not yet implemented\n");
+         stored_player[i].artwork_element = artwork_element;
 
-      break;
-    }
+         SetPlayerWaiting(&stored_player[i], FALSE);
 
-    case CA_SET_CE_COUNT:
-    {
-      printf("::: CA_SET_CE_COUNT -- not yet implemented\n");
+         /* set number of special actions for bored and sleeping animation */
+         stored_player[i].num_special_action_bored =
+           get_num_special_action(artwork_element,
+                                  ACTION_BORING_1, ACTION_BORING_LAST);
+         stored_player[i].num_special_action_sleeping =
+           get_num_special_action(artwork_element,
+                                  ACTION_SLEEPING_1, ACTION_SLEEPING_LAST);
+       }
+      }
 
       break;
     }
 
-    case CA_SET_DYNABOMB_NUMBER:
-    {
-      printf("::: CA_SET_DYNABOMB_NUMBER -- not yet implemented\n");
-
-      break;
-    }
+    /* ---------- CE actions  ---------------------------------------------- */
 
-    case CA_SET_DYNABOMB_SIZE:
+    case CA_SET_CE_VALUE:
     {
-      printf("::: CA_SET_DYNABOMB_SIZE -- not yet implemented\n");
+#if USE_NEW_CUSTOM_VALUE
+      int last_ce_value = CustomValue[x][y];
 
-      break;
-    }
+      CustomValue[x][y] = action_arg_number_new;
 
-    case CA_SET_DYNABOMB_POWER:
-    {
-      printf("::: CA_SET_DYNABOMB_POWER -- not yet implemented\n");
+      if (CustomValue[x][y] != last_ce_value)
+      {
+       CheckElementChange(x, y, element, EL_UNDEFINED, CE_VALUE_CHANGES);
+       CheckTriggeredElementChange(x, y, element, CE_VALUE_CHANGES_OF_X);
+
+       if (CustomValue[x][y] == 0)
+       {
+         CheckElementChange(x, y, element, EL_UNDEFINED, CE_VALUE_GETS_ZERO);
+         CheckTriggeredElementChange(x, y, element, CE_VALUE_GETS_ZERO_OF_X);
+       }
+      }
+#endif
 
       break;
     }
 
-    case CA_TOGGLE_PLAYER_GRAVITY:
+    case CA_SET_CE_SCORE:
     {
-      game.gravity = !game.gravity;
+#if USE_NEW_CUSTOM_VALUE
+      int last_ce_score = ei->collect_score;
 
-      break;
-    }
+      ei->collect_score = action_arg_number_new;
 
-    case CA_ENABLE_PLAYER_GRAVITY:
-    {
-      game.gravity = TRUE;
+      if (ei->collect_score != last_ce_score)
+      {
+       CheckElementChange(x, y, element, EL_UNDEFINED, CE_SCORE_CHANGES);
+       CheckTriggeredElementChange(x, y, element, CE_SCORE_CHANGES_OF_X);
+
+       if (ei->collect_score == 0)
+       {
+         int xx, yy;
+
+         CheckElementChange(x, y, element, EL_UNDEFINED, CE_SCORE_GETS_ZERO);
+         CheckTriggeredElementChange(x, y, element, CE_SCORE_GETS_ZERO_OF_X);
+
+         /*
+           This is a very special case that seems to be a mixture between
+           CheckElementChange() and CheckTriggeredElementChange(): while
+           the first one only affects single elements that are triggered
+           directly, the second one affects multiple elements in the playfield
+           that are triggered indirectly by another element. This is a third
+           case: Changing the CE score always affects multiple identical CEs,
+           so every affected CE must be checked, not only the single CE for
+           which the CE score was changed in the first place (as every instance
+           of that CE shares the same CE score, and therefore also can change)!
+         */
+         SCAN_PLAYFIELD(xx, yy)
+         {
+           if (Feld[xx][yy] == element)
+             CheckElementChange(xx, yy, element, EL_UNDEFINED,
+                                CE_SCORE_GETS_ZERO);
+         }
+       }
+      }
+#endif
 
       break;
     }
 
-    case CA_DISABLE_PLAYER_GRAVITY:
+    /* ---------- engine actions  ------------------------------------------ */
+
+    case CA_SET_ENGINE_SCAN_MODE:
     {
-      game.gravity = FALSE;
+      InitPlayfieldScanMode(action_arg);
 
       break;
     }
@@ -6802,63 +9701,140 @@ static void ExecuteCustomElementAction(int element, int page)
   }
 }
 
-static void ChangeElementNowExt(struct ElementChangeInfo *change,
-                               int x, int y, int target_element)
+static void CreateFieldExt(int x, int y, int element, boolean is_change)
 {
+  int old_element = Feld[x][y];
+  int new_element = GetElementFromGroupElement(element);
   int previous_move_direction = MovDir[x][y];
-  boolean add_player = (ELEM_IS_PLAYER(target_element) &&
-                       IS_WALKABLE(Feld[x][y]));
+#if USE_NEW_CUSTOM_VALUE
+  int last_ce_value = CustomValue[x][y];
+#endif
+  boolean player_explosion_protected = PLAYER_EXPLOSION_PROTECTED(x, y);
+  boolean new_element_is_player = ELEM_IS_PLAYER(new_element);
+  boolean add_player_onto_element = (new_element_is_player &&
+#if USE_CODE_THAT_BREAKS_SNAKE_BITE
+                                    /* this breaks SnakeBite when a snake is
+                                       halfway through a door that closes */
+                                    /* NOW FIXED AT LEVEL INIT IN files.c */
+                                    new_element != EL_SOKOBAN_FIELD_PLAYER &&
+#endif
+                                    IS_WALKABLE(old_element));
 
-  /* check if element under player changes from accessible to unaccessible
+#if 0
+  /* check if element under the player changes from accessible to unaccessible
      (needed for special case of dropping element which then changes) */
   if (IS_PLAYER(x, y) && !PLAYER_EXPLOSION_PROTECTED(x, y) &&
-      IS_ACCESSIBLE(Feld[x][y]) && !IS_ACCESSIBLE(target_element))
+      IS_ACCESSIBLE(old_element) && !IS_ACCESSIBLE(new_element))
   {
     Bang(x, y);
+
     return;
   }
+#endif
 
-  if (!add_player)
+  if (!add_player_onto_element)
   {
     if (IS_MOVING(x, y) || IS_BLOCKED(x, y))
       RemoveMovingField(x, y);
     else
       RemoveField(x, y);
 
-    Feld[x][y] = target_element;
+    Feld[x][y] = new_element;
 
+#if !USE_GFX_RESET_GFX_ANIMATION
     ResetGfxAnimation(x, y);
     ResetRandomAnimationValue(x, y);
+#endif
 
-    if (element_info[Feld[x][y]].move_direction_initial == MV_START_PREVIOUS)
+    if (element_info[new_element].move_direction_initial == MV_START_PREVIOUS)
       MovDir[x][y] = previous_move_direction;
 
+#if USE_NEW_CUSTOM_VALUE
+    if (element_info[new_element].use_last_ce_value)
+      CustomValue[x][y] = last_ce_value;
+#endif
+
     InitField_WithBug1(x, y, FALSE);
 
+    new_element = Feld[x][y];  /* element may have changed */
+
+#if USE_GFX_RESET_GFX_ANIMATION
+    ResetGfxAnimation(x, y);
+    ResetRandomAnimationValue(x, y);
+#endif
+
     DrawLevelField(x, y);
 
-    if (GFX_CRUMBLED(Feld[x][y]))
+    if (GFX_CRUMBLED(new_element))
       DrawLevelFieldCrumbledSandNeighbours(x, y);
   }
 
-  /* "Changed[][]" not set yet to allow "entered by player" change one time */
-  if (ELEM_IS_PLAYER(target_element))
-    RelocatePlayer(x, y, target_element);
-
 #if 1
-  Changed[x][y] = TRUE;                /* ignore all further changes in this frame */
+  /* check if element under the player changes from accessible to unaccessible
+     (needed for special case of dropping element which then changes) */
+  /* (must be checked after creating new element for walkable group elements) */
+#if USE_FIX_KILLED_BY_NON_WALKABLE
+  if (IS_PLAYER(x, y) && !player_explosion_protected &&
+      IS_ACCESSIBLE(old_element) && !IS_ACCESSIBLE(new_element))
+  {
+    Bang(x, y);
+
+    return;
+  }
 #else
-  Changed[x][y] |= ChangeEvent[x][y];  /* ignore same changes in this frame */
+  if (IS_PLAYER(x, y) && !PLAYER_EXPLOSION_PROTECTED(x, y) &&
+      IS_ACCESSIBLE(old_element) && !IS_ACCESSIBLE(new_element))
+  {
+    Bang(x, y);
+
+    return;
+  }
 #endif
+#endif
+
+  /* "ChangeCount" not set yet to allow "entered by player" change one time */
+  if (new_element_is_player)
+    RelocatePlayer(x, y, new_element);
 
-  TestIfBadThingTouchesHero(x, y);
+  if (is_change)
+    ChangeCount[x][y]++;       /* count number of changes in the same frame */
+
+  TestIfBadThingTouchesPlayer(x, y);
   TestIfPlayerTouchesCustomElement(x, y);
   TestIfElementTouchesCustomElement(x, y);
 }
 
-static boolean ChangeElementNow(int x, int y, int element, int page)
+static void CreateField(int x, int y, int element)
+{
+  CreateFieldExt(x, y, element, FALSE);
+}
+
+static void CreateElementFromChange(int x, int y, int element)
+{
+  element = GET_VALID_RUNTIME_ELEMENT(element);
+
+#if USE_STOP_CHANGED_ELEMENTS
+  if (game.engine_version >= VERSION_IDENT(3,2,0,7))
+  {
+    int old_element = Feld[x][y];
+
+    /* prevent changed element from moving in same engine frame
+       unless both old and new element can either fall or move */
+    if ((!CAN_FALL(old_element) || !CAN_FALL(element)) &&
+       (!CAN_MOVE(old_element) || !CAN_MOVE(element)))
+      Stop[x][y] = TRUE;
+  }
+#endif
+
+  CreateFieldExt(x, y, element, TRUE);
+}
+
+static boolean ChangeElement(int x, int y, int element, int page)
 {
-  struct ElementChangeInfo *change = &element_info[element].change_page[page];
+  struct ElementInfo *ei = &element_info[element];
+  struct ElementChangeInfo *change = &ei->change_page[page];
+  int ce_value = CustomValue[x][y];
+  int ce_score = ei->collect_score;
   int target_element;
   int old_element = Feld[x][y];
 
@@ -6871,23 +9847,16 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
     /* reset actual trigger element, trigger player and action element */
     change->actual_trigger_element = EL_EMPTY;
     change->actual_trigger_player = EL_PLAYER_1;
+    change->actual_trigger_side = CH_SIDE_NONE;
+    change->actual_trigger_ce_value = 0;
+    change->actual_trigger_ce_score = 0;
   }
 
-#if 1
-  /* do not change any elements that have already changed in this frame */
-  if (Changed[x][y])
-    return FALSE;
-#else
-  /* do not change already changed elements with same change event */
-  if (Changed[x][y] & ChangeEvent[x][y])
+  /* do not change elements more than a specified maximum number of changes */
+  if (ChangeCount[x][y] >= game.max_num_changes_per_frame)
     return FALSE;
-#endif
 
-#if 1
-  Changed[x][y] = TRUE;                /* ignore all further changes in this frame */
-#else
-  Changed[x][y] |= ChangeEvent[x][y];  /* ignore same changes in this frame */
-#endif
+  ChangeCount[x][y]++;         /* count number of changes in the same frame */
 
   if (change->explode)
   {
@@ -6912,7 +9881,7 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
       boolean is_destructible;
       int ex = x + xx - 1;
       int ey = y + yy - 1;
-      int content_element = change->target_content[xx][yy];
+      int content_element = change->target_content.e[xx][yy];
       int e;
 
       can_replace[xx][yy] = TRUE;
@@ -6984,10 +9953,11 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
 
          ChangeEvent[ex][ey] = ChangeEvent[x][y];
 
-         content_element = change->target_content[xx][yy];
-         target_element = GET_TARGET_ELEMENT(content_element, change);
+         content_element = change->target_content.e[xx][yy];
+         target_element = GET_TARGET_ELEMENT(element, content_element, change,
+                                             ce_value, ce_score);
 
-         ChangeElementNowExt(change, ex, ey, target_element);
+         CreateElementFromChange(ex, ey, target_element);
 
          something_has_changed = TRUE;
 
@@ -6998,16 +9968,29 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
       }
 
       if (something_has_changed)
+      {
        PlayLevelSoundElementAction(x, y, element, ACTION_CHANGING);
+       PlayLevelSoundElementAction(x, y, element, ACTION_PAGE_1 + page);
+      }
     }
   }
   else
   {
-    target_element = GET_TARGET_ELEMENT(change->target_element, change);
+    target_element = GET_TARGET_ELEMENT(element, change->target_element, change,
+                                       ce_value, ce_score);
+
+    if (element == EL_DIAGONAL_GROWING ||
+       element == EL_DIAGONAL_SHRINKING)
+    {
+      target_element = Store[x][y];
+
+      Store[x][y] = EL_EMPTY;
+    }
 
-    ChangeElementNowExt(change, x, y, target_element);
+    CreateElementFromChange(x, y, target_element);
 
     PlayLevelSoundElementAction(x, y, element, ACTION_CHANGING);
+    PlayLevelSoundElementAction(x, y, element, ACTION_PAGE_1 + page);
   }
 
   /* this uses direct change before indirect change */
@@ -7016,7 +9999,112 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
   return TRUE;
 }
 
-static void ChangeElement(int x, int y, int page)
+#if USE_NEW_DELAYED_ACTION
+
+static void HandleElementChange(int x, int y, int page)
+{
+  int element = MovingOrBlocked2Element(x, y);
+  struct ElementInfo *ei = &element_info[element];
+  struct ElementChangeInfo *change = &ei->change_page[page];
+
+#ifdef DEBUG
+  if (!CAN_CHANGE_OR_HAS_ACTION(element) &&
+      !CAN_CHANGE_OR_HAS_ACTION(Back[x][y]))
+  {
+    printf("\n\n");
+    printf("HandleElementChange(): %d,%d: element = %d ('%s')\n",
+          x, y, element, element_info[element].token_name);
+    printf("HandleElementChange(): This should never happen!\n");
+    printf("\n\n");
+  }
+#endif
+
+  /* this can happen with classic bombs on walkable, changing elements */
+  if (!CAN_CHANGE_OR_HAS_ACTION(element))
+  {
+#if 0
+    if (!CAN_CHANGE(Back[x][y]))       /* prevent permanent repetition */
+      ChangeDelay[x][y] = 0;
+#endif
+
+    return;
+  }
+
+  if (ChangeDelay[x][y] == 0)          /* initialize element change */
+  {
+    ChangeDelay[x][y] = GET_CHANGE_DELAY(change) + 1;
+
+    if (change->can_change)
+    {
+#if 1
+      /* !!! not clear why graphic animation should be reset at all here !!! */
+      /* !!! UPDATE: but is needed for correct Snake Bite tail animation !!! */
+#if USE_GFX_RESET_WHEN_NOT_MOVING
+      /* when a custom element is about to change (for example by change delay),
+        do not reset graphic animation when the custom element is moving */
+      if (!IS_MOVING(x, y))
+#endif
+      {
+       ResetGfxAnimation(x, y);
+       ResetRandomAnimationValue(x, y);
+      }
+#endif
+
+      if (change->pre_change_function)
+       change->pre_change_function(x, y);
+    }
+  }
+
+  ChangeDelay[x][y]--;
+
+  if (ChangeDelay[x][y] != 0)          /* continue element change */
+  {
+    if (change->can_change)
+    {
+      int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+
+      if (IS_ANIMATED(graphic))
+       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+      if (change->change_function)
+       change->change_function(x, y);
+    }
+  }
+  else                                 /* finish element change */
+  {
+    if (ChangePage[x][y] != -1)                /* remember page from delayed change */
+    {
+      page = ChangePage[x][y];
+      ChangePage[x][y] = -1;
+
+      change = &ei->change_page[page];
+    }
+
+    if (IS_MOVING(x, y))               /* never change a running system ;-) */
+    {
+      ChangeDelay[x][y] = 1;           /* try change after next move step */
+      ChangePage[x][y] = page;         /* remember page to use for change */
+
+      return;
+    }
+
+    if (change->can_change)
+    {
+      if (ChangeElement(x, y, element, page))
+      {
+       if (change->post_change_function)
+         change->post_change_function(x, y);
+      }
+    }
+
+    if (change->has_action)
+      ExecuteCustomElementAction(x, y, element, page);
+  }
+}
+
+#else
+
+static void HandleElementChange(int x, int y, int page)
 {
   int element = MovingOrBlocked2Element(x, y);
   struct ElementInfo *ei = &element_info[element];
@@ -7026,9 +10114,9 @@ static void ChangeElement(int x, int y, int page)
   if (!CAN_CHANGE(element) && !CAN_CHANGE(Back[x][y]))
   {
     printf("\n\n");
-    printf("ChangeElement(): %d,%d: element = %d ('%s')\n",
+    printf("HandleElementChange(): %d,%d: element = %d ('%s')\n",
           x, y, element, element_info[element].token_name);
-    printf("ChangeElement(): This should never happen!\n");
+    printf("HandleElementChange(): This should never happen!\n");
     printf("\n\n");
   }
 #endif
@@ -7085,7 +10173,7 @@ static void ChangeElement(int x, int y, int page)
       return;
     }
 
-    if (ChangeElementNow(x, y, element, page))
+    if (ChangeElement(x, y, element, page))
     {
       if (change->post_change_function)
        change->post_change_function(x, y);
@@ -7093,31 +10181,43 @@ static void ChangeElement(int x, int y, int page)
   }
 }
 
-static boolean CheckTriggeredElementChangeExt(int lx, int ly,
+#endif
+
+static boolean CheckTriggeredElementChangeExt(int trigger_x, int trigger_y,
                                              int trigger_element,
                                              int trigger_event,
                                              int trigger_player,
                                              int trigger_side,
                                              int trigger_page)
 {
-  int i, j, x, y;
+  boolean change_done_any = FALSE;
   int trigger_page_bits = (trigger_page < 0 ? CH_PAGE_ANY : 1 << trigger_page);
+  int i;
 
   if (!(trigger_events[trigger_element][trigger_event]))
     return FALSE;
 
+#if 0
+  printf("::: CheckTriggeredElementChangeExt %d ... [%d, %d, %d, '%s']\n",
+        trigger_event, recursion_loop_depth, recursion_loop_detected,
+        recursion_loop_element, EL_NAME(recursion_loop_element));
+#endif
+
+  RECURSION_LOOP_DETECTION_START(trigger_element, FALSE);
+
   for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
   {
     int element = EL_CUSTOM_START + i;
-    boolean change_found = FALSE;
+    boolean change_done = FALSE;
+    int p;
 
     if (!CAN_CHANGE_OR_HAS_ACTION(element) ||
        !HAS_ANY_CHANGE_EVENT(element, trigger_event))
       continue;
 
-    for (j = 0; j < element_info[element].num_change_pages; j++)
+    for (p = 0; p < element_info[element].num_change_pages; p++)
     {
-      struct ElementChangeInfo *change = &element_info[element].change_page[j];
+      struct ElementChangeInfo *change = &element_info[element].change_page[p];
 
       if (change->can_change_or_has_action &&
          change->has_event[trigger_event] &&
@@ -7128,29 +10228,54 @@ static boolean CheckTriggeredElementChangeExt(int lx, int ly,
       {
        change->actual_trigger_element = trigger_element;
        change->actual_trigger_player = EL_PLAYER_1 + log_2(trigger_player);
+       change->actual_trigger_side = trigger_side;
+       change->actual_trigger_ce_value = CustomValue[trigger_x][trigger_y];
+       change->actual_trigger_ce_score = GET_CE_SCORE(trigger_element);
 
-       if (change->can_change && !change_found)
+       if ((change->can_change && !change_done) || change->has_action)
        {
-         change_found = TRUE;
+         int x, y;
 
-         for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+         SCAN_PLAYFIELD(x, y)
          {
            if (Feld[x][y] == element)
            {
-             ChangeDelay[x][y] = 1;
-             ChangeEvent[x][y] = trigger_event;
-             ChangeElement(x, y, j);
+             if (change->can_change && !change_done)
+             {
+               ChangeDelay[x][y] = 1;
+               ChangeEvent[x][y] = trigger_event;
+
+               HandleElementChange(x, y, p);
+             }
+#if USE_NEW_DELAYED_ACTION
+             else if (change->has_action)
+             {
+               ExecuteCustomElementAction(x, y, element, p);
+               PlayLevelSoundElementAction(x, y, element, ACTION_PAGE_1 + p);
+             }
+#else
+             if (change->has_action)
+             {
+               ExecuteCustomElementAction(x, y, element, p);
+               PlayLevelSoundElementAction(x, y, element, ACTION_PAGE_1 + p);
+             }
+#endif
            }
          }
-       }
 
-       if (change->has_action)
-         ExecuteCustomElementAction(element, j);
+         if (change->can_change)
+         {
+           change_done = TRUE;
+           change_done_any = TRUE;
+         }
+       }
       }
     }
   }
 
-  return TRUE;
+  RECURSION_LOOP_DETECTION_END();
+
+  return change_done_any;
 }
 
 static boolean CheckElementChangeExt(int x, int y,
@@ -7158,10 +10283,13 @@ static boolean CheckElementChangeExt(int x, int y,
                                     int trigger_element,
                                     int trigger_event,
                                     int trigger_player,
-                                    int trigger_side,
-                                    int trigger_page)
+                                    int trigger_side)
 {
-  if (!CAN_CHANGE(element) || !HAS_ANY_CHANGE_EVENT(element, trigger_event))
+  boolean change_done = FALSE;
+  int p;
+
+  if (!CAN_CHANGE_OR_HAS_ACTION(element) ||
+      !HAS_ANY_CHANGE_EVENT(element, trigger_event))
     return FALSE;
 
   if (Feld[x][y] == EL_BLOCKED)
@@ -7170,80 +10298,134 @@ static boolean CheckElementChangeExt(int x, int y,
     element = Feld[x][y];
   }
 
-  if (Feld[x][y] != element)   /* check if element has already changed */
+#if 0
+  /* check if element has already changed */
+  if (Feld[x][y] != element)
+    return FALSE;
+#else
+  /* check if element has already changed or is about to change after moving */
+  if ((game.engine_version < VERSION_IDENT(3,2,0,7) &&
+       Feld[x][y] != element) ||
+
+      (game.engine_version >= VERSION_IDENT(3,2,0,7) &&
+       (ChangeCount[x][y] >= game.max_num_changes_per_frame ||
+       ChangePage[x][y] != -1)))
     return FALSE;
+#endif
+
+#if 0
+  printf("::: CheckElementChangeExt %d ... [%d, %d, %d, '%s']\n",
+        trigger_event, recursion_loop_depth, recursion_loop_detected,
+        recursion_loop_element, EL_NAME(recursion_loop_element));
+#endif
 
-  if (trigger_page < 0)
+  RECURSION_LOOP_DETECTION_START(trigger_element, FALSE);
+
+  for (p = 0; p < element_info[element].num_change_pages; p++)
   {
-    boolean change_element = FALSE;
-    int i;
+    struct ElementChangeInfo *change = &element_info[element].change_page[p];
 
-    for (i = 0; i < element_info[element].num_change_pages; i++)
-    {
-      struct ElementChangeInfo *change = &element_info[element].change_page[i];
+    /* check trigger element for all events where the element that is checked
+       for changing interacts with a directly adjacent element -- this is
+       different to element changes that affect other elements to change on the
+       whole playfield (which is handeld by CheckTriggeredElementChangeExt()) */
+    boolean check_trigger_element =
+      (trigger_event == CE_TOUCHING_X ||
+       trigger_event == CE_HITTING_X ||
+       trigger_event == CE_HIT_BY_X ||
+#if 1
+       /* this one was forgotten until 3.2.3 */
+       trigger_event == CE_DIGGING_X);
+#endif
 
-      boolean check_trigger_element =
-       (trigger_event == CE_TOUCHING_X ||
-        trigger_event == CE_HITTING_X ||
-        trigger_event == CE_HIT_BY_X);
+    if (change->can_change_or_has_action &&
+       change->has_event[trigger_event] &&
+       change->trigger_side & trigger_side &&
+       change->trigger_player & trigger_player &&
+       (!check_trigger_element ||
+        IS_EQUAL_OR_IN_GROUP(trigger_element, change->trigger_element)))
+    {
+      change->actual_trigger_element = trigger_element;
+      change->actual_trigger_player = EL_PLAYER_1 + log_2(trigger_player);
+      change->actual_trigger_side = trigger_side;
+      change->actual_trigger_ce_value = CustomValue[x][y];
+      change->actual_trigger_ce_score = GET_CE_SCORE(trigger_element);
 
-      if (change->can_change &&
-         change->has_event[trigger_event] &&
-         change->trigger_side & trigger_side &&
-         change->trigger_player & trigger_player &&
-         (!check_trigger_element ||
-          IS_EQUAL_OR_IN_GROUP(trigger_element, change->trigger_element)))
+      /* special case: trigger element not at (x,y) position for some events */
+      if (check_trigger_element)
       {
-       change_element = TRUE;
-       trigger_page = i;
+       static struct
+       {
+         int dx, dy;
+       } move_xy[] =
+         {
+           {  0,  0 },
+           { -1,  0 },
+           { +1,  0 },
+           {  0,  0 },
+           {  0, -1 },
+           {  0,  0 }, { 0, 0 }, { 0, 0 },
+           {  0, +1 }
+         };
 
-       change->actual_trigger_element = trigger_element;
-       change->actual_trigger_player = EL_PLAYER_1 + log_2(trigger_player);
+       int xx = x + move_xy[MV_DIR_OPPOSITE(trigger_side)].dx;
+       int yy = y + move_xy[MV_DIR_OPPOSITE(trigger_side)].dy;
 
-       break;
+       change->actual_trigger_ce_value = CustomValue[xx][yy];
+       change->actual_trigger_ce_score = GET_CE_SCORE(trigger_element);
       }
-    }
 
-    if (!change_element)
-      return FALSE;
-  }
-  else
-  {
-    struct ElementInfo *ei = &element_info[element];
-    struct ElementChangeInfo *change = &ei->change_page[trigger_page];
+      if (change->can_change && !change_done)
+      {
+       ChangeDelay[x][y] = 1;
+       ChangeEvent[x][y] = trigger_event;
 
-    change->actual_trigger_element = trigger_element;
-    change->actual_trigger_player = EL_PLAYER_1;       /* unused */
+       HandleElementChange(x, y, p);
+
+       change_done = TRUE;
+      }
+#if USE_NEW_DELAYED_ACTION
+      else if (change->has_action)
+      {
+       ExecuteCustomElementAction(x, y, element, p);
+       PlayLevelSoundElementAction(x, y, element, ACTION_PAGE_1 + p);
+      }
+#else
+      if (change->has_action)
+      {
+       ExecuteCustomElementAction(x, y, element, p);
+       PlayLevelSoundElementAction(x, y, element, ACTION_PAGE_1 + p);
+      }
+#endif
+    }
   }
 
-  ChangeDelay[x][y] = 1;
-  ChangeEvent[x][y] = trigger_event;
-  ChangeElement(x, y, trigger_page);
+  RECURSION_LOOP_DETECTION_END();
 
-  return TRUE;
+  return change_done;
 }
 
 static void PlayPlayerSound(struct PlayerInfo *player)
 {
   int jx = player->jx, jy = player->jy;
-  int element = player->element_nr;
+  int sound_element = player->artwork_element;
   int last_action = player->last_action_waiting;
   int action = player->action_waiting;
 
   if (player->is_waiting)
   {
     if (action != last_action)
-      PlayLevelSoundElementAction(jx, jy, element, action);
+      PlayLevelSoundElementAction(jx, jy, sound_element, action);
     else
-      PlayLevelSoundElementActionIfLoop(jx, jy, element, action);
+      PlayLevelSoundElementActionIfLoop(jx, jy, sound_element, action);
   }
   else
   {
     if (action != last_action)
-      StopSound(element_info[element].sound[last_action]);
+      StopSound(element_info[sound_element].sound[last_action]);
 
     if (last_action == ACTION_SLEEPING)
-      PlayLevelSoundElementAction(jx, jy, element, ACTION_AWAKENING);
+      PlayLevelSoundElementAction(jx, jy, sound_element, ACTION_AWAKENING);
   }
 }
 
@@ -7261,6 +10443,7 @@ static void SetPlayerWaiting(struct PlayerInfo *player, boolean is_waiting)
   boolean last_waiting = player->is_waiting;
   int move_dir = player->MovDir;
 
+  player->dir_waiting = move_dir;
   player->last_action_waiting = player->action_waiting;
 
   if (is_waiting)
@@ -7272,13 +10455,13 @@ static void SetPlayerWaiting(struct PlayerInfo *player, boolean is_waiting)
       player->frame_counter_bored =
        FrameCounter +
        game.player_boring_delay_fixed +
-       SimpleRND(game.player_boring_delay_random);
+       GetSimpleRandom(game.player_boring_delay_random);
       player->frame_counter_sleeping =
        FrameCounter +
        game.player_sleeping_delay_fixed +
-       SimpleRND(game.player_sleeping_delay_random);
+       GetSimpleRandom(game.player_sleeping_delay_random);
 
-      InitPlayerGfxAnimation(player, ACTION_WAITING, player->MovDir);
+      InitPlayerGfxAnimation(player, ACTION_WAITING, move_dir);
     }
 
     if (game.player_sleeping_delay_fixed +
@@ -7296,6 +10479,24 @@ static void SetPlayerWaiting(struct PlayerInfo *player, boolean is_waiting)
                              player->is_bored ? ACTION_BORING :
                              ACTION_WAITING);
 
+    if (player->is_sleeping && player->use_murphy)
+    {
+      /* special case for sleeping Murphy when leaning against non-free tile */
+
+      if (!IN_LEV_FIELD(player->jx - 1, player->jy) ||
+         (Feld[player->jx - 1][player->jy] != EL_EMPTY &&
+          !IS_MOVING(player->jx - 1, player->jy)))
+       move_dir = MV_LEFT;
+      else if (!IN_LEV_FIELD(player->jx + 1, player->jy) ||
+              (Feld[player->jx + 1][player->jy] != EL_EMPTY &&
+               !IS_MOVING(player->jx + 1, player->jy)))
+       move_dir = MV_RIGHT;
+      else
+       player->is_sleeping = FALSE;
+
+      player->dir_waiting = move_dir;
+    }
+
     if (player->is_sleeping)
     {
       if (player->num_special_action_sleeping > 0)
@@ -7310,14 +10511,14 @@ static void SetPlayerWaiting(struct PlayerInfo *player, boolean is_waiting)
             last_special_action < ACTION_SLEEPING_1 + num_special_action - 1 ?
             last_special_action + 1 : ACTION_SLEEPING);
          int special_graphic =
-           el_act_dir2img(player->element_nr, special_action, move_dir);
+           el_act_dir2img(player->artwork_element, special_action, move_dir);
 
          player->anim_delay_counter =
            graphic_info[special_graphic].anim_delay_fixed +
-           SimpleRND(graphic_info[special_graphic].anim_delay_random);
+           GetSimpleRandom(graphic_info[special_graphic].anim_delay_random);
          player->post_delay_counter =
            graphic_info[special_graphic].post_delay_fixed +
-           SimpleRND(graphic_info[special_graphic].post_delay_random);
+           GetSimpleRandom(graphic_info[special_graphic].post_delay_random);
 
          player->special_action_sleeping = special_action;
        }
@@ -7340,16 +10541,16 @@ static void SetPlayerWaiting(struct PlayerInfo *player, boolean is_waiting)
        if (player->anim_delay_counter == 0 && player->post_delay_counter == 0)
        {
          int special_action =
-           ACTION_BORING_1 + SimpleRND(player->num_special_action_bored);
+           ACTION_BORING_1 + GetSimpleRandom(player->num_special_action_bored);
          int special_graphic =
-           el_act_dir2img(player->element_nr, special_action, move_dir);
+           el_act_dir2img(player->artwork_element, special_action, move_dir);
 
          player->anim_delay_counter =
            graphic_info[special_graphic].anim_delay_fixed +
-           SimpleRND(graphic_info[special_graphic].anim_delay_random);
+           GetSimpleRandom(graphic_info[special_graphic].anim_delay_random);
          player->post_delay_counter =
            graphic_info[special_graphic].post_delay_fixed +
-           SimpleRND(graphic_info[special_graphic].post_delay_random);
+           GetSimpleRandom(graphic_info[special_graphic].post_delay_random);
 
          player->special_action_bored = special_action;
        }
@@ -7378,6 +10579,7 @@ static void SetPlayerWaiting(struct PlayerInfo *player, boolean is_waiting)
     player->anim_delay_counter = 0;
     player->post_delay_counter = 0;
 
+    player->dir_waiting = player->MovDir;
     player->action_waiting = ACTION_DEFAULT;
 
     player->special_action_bored = ACTION_DEFAULT;
@@ -7394,8 +10596,8 @@ static byte PlayerActions(struct PlayerInfo *player, byte player_action)
   int down     = player_action & JOY_DOWN;
   int button1  = player_action & JOY_BUTTON_1;
   int button2  = player_action & JOY_BUTTON_2;
-  int dx       = (left ? -1    : right ? 1     : 0);
-  int dy       = (up   ? -1    : down  ? 1     : 0);
+  int dx       = (left ? -1 : right ? 1 : 0);
+  int dy       = (up   ? -1 : down  ? 1 : 0);
 
   if (!player->active || tape.pausing)
     return 0;
@@ -7433,16 +10635,109 @@ static byte PlayerActions(struct PlayerInfo *player, byte player_action)
     SnapField(player, 0, 0);
     CheckGravityMovementWhenNotMoving(player);
 
-    if (player->MovPos == 0)
-      SetPlayerWaiting(player, TRUE);
+    if (player->MovPos == 0)
+      SetPlayerWaiting(player, TRUE);
+
+    if (player->MovPos == 0)   /* needed for tape.playing */
+      player->is_moving = FALSE;
+
+    player->is_dropping = FALSE;
+    player->is_dropping_pressed = FALSE;
+    player->drop_pressed_delay = 0;
+
+    return 0;
+  }
+}
+
+static void CheckLevelTime()
+{
+  int i;
+
+  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
+  {
+    if (level.native_em_level->lev->home == 0) /* all players at home */
+    {
+      PlayerWins(local_player);
+
+      AllPlayersGone = TRUE;
+
+      level.native_em_level->lev->home = -1;
+    }
+
+    if (level.native_em_level->ply[0]->alive == 0 &&
+       level.native_em_level->ply[1]->alive == 0 &&
+       level.native_em_level->ply[2]->alive == 0 &&
+       level.native_em_level->ply[3]->alive == 0)      /* all dead */
+      AllPlayersGone = TRUE;
+  }
+
+  if (TimeFrames >= FRAMES_PER_SECOND)
+  {
+    TimeFrames = 0;
+    TapeTime++;
+
+    for (i = 0; i < MAX_PLAYERS; i++)
+    {
+      struct PlayerInfo *player = &stored_player[i];
+
+      if (SHIELD_ON(player))
+      {
+       player->shield_normal_time_left--;
+
+       if (player->shield_deadly_time_left > 0)
+         player->shield_deadly_time_left--;
+      }
+    }
+
+    if (!local_player->LevelSolved && !level.use_step_counter)
+    {
+      TimePlayed++;
+
+      if (TimeLeft > 0)
+      {
+       TimeLeft--;
+
+       if (TimeLeft <= 10 && setup.time_limit)
+         PlaySound(SND_GAME_RUNNING_OUT_OF_TIME);
+
+#if 1
+       game_control_value[GAME_CONTROL_TIME] = TimeLeft;
+
+       DisplayGameControlValues();
+#else
+       DrawGameValue_Time(TimeLeft);
+#endif
+
+       if (!TimeLeft && setup.time_limit)
+       {
+         if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
+           level.native_em_level->lev->killed_out_of_time = TRUE;
+         else
+           for (i = 0; i < MAX_PLAYERS; i++)
+             KillPlayer(&stored_player[i]);
+       }
+      }
+#if 1
+      else if (level.time == 0 && !AllPlayersGone) /* level w/o time limit */
+      {
+       game_control_value[GAME_CONTROL_TIME] = TimePlayed;
 
-    if (player->MovPos == 0)   /* needed for tape.playing */
-      player->is_moving = FALSE;
+       DisplayGameControlValues();
+      }
+#else
+      else if (level.time == 0 && !AllPlayersGone) /* level w/o time limit */
+       DrawGameValue_Time(TimePlayed);
+#endif
 
-    player->is_dropping = FALSE;
+      level.native_em_level->lev->time =
+       (level.time == 0 ? TimePlayed : TimeLeft);
+    }
 
-    return 0;
+    if (tape.recording || tape.playing)
+      DrawVideoDisplay(VIDEO_STATE_TIME_ON, TapeTime);
   }
+
+  DrawGameDoorValues();
 }
 
 void AdvanceFrameAndPlayerCounters(int player_nr)
@@ -7457,44 +10752,121 @@ void AdvanceFrameAndPlayerCounters(int player_nr)
   for (i = 0; i < MAX_PLAYERS; i++)
   {
     boolean advance_player_counters = (player_nr == -1 || player_nr == i);
-    int move_frames =
-      MOVE_DELAY_NORMAL_SPEED /  stored_player[i].move_delay_value;
+    int move_delay_value = stored_player[i].move_delay_value;
+    int move_frames = MOVE_DELAY_NORMAL_SPEED / move_delay_value;
 
     if (!advance_player_counters)      /* not all players may be affected */
       continue;
 
+#if USE_NEW_PLAYER_ANIM
+    if (move_frames == 0)      /* less than one move per game frame */
+    {
+      int stepsize = TILEX / move_delay_value;
+      int delay = move_delay_value / MOVE_DELAY_NORMAL_SPEED;
+      int count = (stored_player[i].is_moving ?
+                  ABS(stored_player[i].MovPos) / stepsize : FrameCounter);
+
+      if (count % delay == 0)
+       move_frames = 1;
+    }
+#endif
+
     stored_player[i].Frame += move_frames;
 
     if (stored_player[i].MovPos != 0)
       stored_player[i].StepFrame += move_frames;
 
-#if USE_NEW_MOVE_DELAY
     if (stored_player[i].move_delay > 0)
       stored_player[i].move_delay--;
-#endif
 
-#if USE_NEW_PUSH_DELAY
     /* due to bugs in previous versions, counter must count up, not down */
     if (stored_player[i].push_delay != -1)
       stored_player[i].push_delay++;
-#endif
 
     if (stored_player[i].drop_delay > 0)
       stored_player[i].drop_delay--;
+
+    if (stored_player[i].is_dropping_pressed)
+      stored_player[i].drop_pressed_delay++;
+  }
+}
+
+void StartGameActions(boolean init_network_game, boolean record_tape,
+                     long random_seed)
+{
+  unsigned long new_random_seed = InitRND(random_seed);
+
+  if (record_tape)
+    TapeStartRecording(new_random_seed);
+
+#if defined(NETWORK_AVALIABLE)
+  if (init_network_game)
+  {
+    SendToServer_StartPlaying();
+
+    return;
   }
+#endif
+
+  InitGame();
 }
 
 void GameActions()
 {
   static unsigned long game_frame_delay = 0;
   unsigned long game_frame_delay_value;
-  int magic_wall_x = 0, magic_wall_y = 0;
-  int i, x, y, element, graphic;
   byte *recorded_player_action;
   byte summarized_player_action = 0;
   byte tape_action[MAX_PLAYERS];
+  int i;
 
-  if (game_status != GAME_MODE_PLAYING)
+  /* detect endless loops, caused by custom element programming */
+  if (recursion_loop_detected && recursion_loop_depth == 0)
+  {
+    char *message = getStringCat3("Internal Error ! Element ",
+                                 EL_NAME(recursion_loop_element),
+                                 " caused endless loop ! Quit the game ?");
+
+    Error(ERR_WARN, "element '%s' caused endless loop in game engine",
+         EL_NAME(recursion_loop_element));
+
+    RequestQuitGameExt(FALSE, level_editor_test_game, message);
+
+    recursion_loop_detected = FALSE;   /* if game should be continued */
+
+    free(message);
+
+    return;
+  }
+
+  if (game.restart_level)
+    StartGameActions(options.network, setup.autorecord, NEW_RANDOMIZE);
+
+  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
+  {
+    if (level.native_em_level->lev->home == 0) /* all players at home */
+    {
+      PlayerWins(local_player);
+
+      AllPlayersGone = TRUE;
+
+      level.native_em_level->lev->home = -1;
+    }
+
+    if (level.native_em_level->ply[0]->alive == 0 &&
+       level.native_em_level->ply[1]->alive == 0 &&
+       level.native_em_level->ply[2]->alive == 0 &&
+       level.native_em_level->ply[3]->alive == 0)      /* all dead */
+      AllPlayersGone = TRUE;
+  }
+
+  if (local_player->LevelSolved && !local_player->LevelSolved_GameEnd)
+    GameWon();
+
+  if (AllPlayersGone && !TAPE_IS_STOPPED(tape))
+    TapeStop();
+
+  if (game_status != GAME_MODE_PLAYING)                /* status might have changed */
     return;
 
   game_frame_delay_value =
@@ -7522,19 +10894,32 @@ void GameActions()
 
     if (!network_player_action_received)
       return;          /* failed to get network player actions in time */
+
+    /* do not yet reset "network_player_action_received" (for tape.pausing) */
   }
 
   if (tape.pausing)
     return;
 
+  /* at this point we know that we really continue executing the game */
+
+  network_player_action_received = FALSE;
+
+  /* when playing tape, read previously recorded player input from tape data */
   recorded_player_action = (tape.playing ? TapePlayAction() : NULL);
 
 #if 1
-  /* !!! CHECK THIS (tape.pausing is always FALSE here!) !!! */
-  if (recorded_player_action == NULL && tape.pausing)
+  /* TapePlayAction() may return NULL when toggling to "pause before death" */
+  if (tape.pausing)
     return;
 #endif
 
+  if (tape.set_centered_player)
+  {
+    game.centered_player_nr_next = tape.centered_player_nr_next;
+    game.set_centered_player = TRUE;
+  }
+
   for (i = 0; i < MAX_PLAYERS; i++)
   {
     summarized_player_action |= stored_player[i].action;
@@ -7551,6 +10936,13 @@ void GameActions()
   if (!options.network && !setup.team_mode)
     local_player->effective_action = summarized_player_action;
 
+  if (setup.team_mode && setup.input_on_focus && game.centered_player_nr != -1)
+  {
+    for (i = 0; i < MAX_PLAYERS; i++)
+      stored_player[i].effective_action =
+       (i == game.centered_player_nr ? summarized_player_action : 0);
+  }
+
   if (recorded_player_action != NULL)
     for (i = 0; i < MAX_PLAYERS; i++)
       stored_player[i].effective_action = recorded_player_action[i];
@@ -7559,14 +10951,101 @@ void GameActions()
   {
     tape_action[i] = stored_player[i].effective_action;
 
+    /* (this can only happen in the R'n'D game engine) */
     if (tape.recording && tape_action[i] && !tape.player_participates[i])
       tape.player_participates[i] = TRUE;    /* player just appeared from CE */
   }
 
-  /* only save actions from input devices, but not programmed actions */
+  /* only record actions from input devices, but not programmed actions */
   if (tape.recording)
     TapeRecordAction(tape_action);
 
+  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
+  {
+    GameActions_EM_Main();
+  }
+  else
+  {
+    GameActions_RND();
+  }
+}
+
+void GameActions_EM_Main()
+{
+  byte effective_action[MAX_PLAYERS];
+  boolean warp_mode = (tape.playing && tape.warp_forward && !tape.pausing);
+  int i;
+
+  for (i = 0; i < MAX_PLAYERS; i++)
+    effective_action[i] = stored_player[i].effective_action;
+
+  GameActions_EM(effective_action, warp_mode);
+
+  CheckLevelTime();
+
+  AdvanceFrameAndPlayerCounters(-1);   /* advance counters for all players */
+}
+
+void GameActions_RND()
+{
+  int magic_wall_x = 0, magic_wall_y = 0;
+  int i, x, y, element, graphic;
+
+  InitPlayfieldScanModeVars();
+
+#if USE_ONE_MORE_CHANGE_PER_FRAME
+  if (game.engine_version >= VERSION_IDENT(3,2,0,7))
+  {
+    SCAN_PLAYFIELD(x, y)
+    {
+      ChangeCount[x][y] = 0;
+      ChangeEvent[x][y] = -1;
+    }
+  }
+#endif
+
+  if (game.set_centered_player)
+  {
+    boolean all_players_fit_to_screen = checkIfAllPlayersFitToScreen_RND();
+
+    /* switching to "all players" only possible if all players fit to screen */
+    if (game.centered_player_nr_next == -1 && !all_players_fit_to_screen)
+    {
+      game.centered_player_nr_next = game.centered_player_nr;
+      game.set_centered_player = FALSE;
+    }
+
+    /* do not switch focus to non-existing (or non-active) player */
+    if (game.centered_player_nr_next >= 0 &&
+       !stored_player[game.centered_player_nr_next].active)
+    {
+      game.centered_player_nr_next = game.centered_player_nr;
+      game.set_centered_player = FALSE;
+    }
+  }
+
+  if (game.set_centered_player &&
+      ScreenMovPos == 0)       /* screen currently aligned at tile position */
+  {
+    int sx, sy;
+
+    if (game.centered_player_nr_next == -1)
+    {
+      setScreenCenteredToAllPlayers(&sx, &sy);
+    }
+    else
+    {
+      sx = stored_player[game.centered_player_nr_next].jx;
+      sy = stored_player[game.centered_player_nr_next].jy;
+    }
+
+    game.centered_player_nr = game.centered_player_nr_next;
+    game.set_centered_player = FALSE;
+
+    DrawRelocateScreen(0, 0, sx, sy, MV_NONE, TRUE, setup.quick_switch);
+    DrawGameDoorValues();
+  }
+
   for (i = 0; i < MAX_PLAYERS; i++)
   {
     int actual_player_action = stored_player[i].effective_action;
@@ -7586,20 +11065,11 @@ void GameActions()
     if (stored_player[i].programmed_action)
       actual_player_action = stored_player[i].programmed_action;
 
-#if 1
     PlayerActions(&stored_player[i], actual_player_action);
-#else
-    tape_action[i] = PlayerActions(&stored_player[i], actual_player_action);
-
-    if (tape.recording && tape_action[i] && !tape.player_participates[i])
-      tape.player_participates[i] = TRUE;    /* player just appeared from CE */
-#endif
 
     ScrollPlayer(&stored_player[i], SCROLL_GO_ON);
   }
 
-  network_player_action_received = FALSE;
-
   ScrollScreen(NULL, SCROLL_GO_ON);
 
   /* for backwards compatibility, the following code emulates a fixed bug that
@@ -7627,19 +11097,20 @@ void GameActions()
 
        /* continue moving after pushing (this is actually a bug) */
        if (!IS_MOVING(x, y))
-       {
          Stop[x][y] = FALSE;
-       }
       }
     }
   }
 
-  for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+#if 0
+  debug_print_timestamp(0, "start main loop profiling");
+#endif
+
+  SCAN_PLAYFIELD(x, y)
   {
-    Changed[x][y] = FALSE;
+    ChangeCount[x][y] = 0;
     ChangeEvent[x][y] = -1;
 
-#if USE_NEW_BLOCK_STYLE
     /* this must be handled before main playfield loop */
     if (Feld[x][y] == EL_PLAYER_IS_LEAVING)
     {
@@ -7647,6 +11118,19 @@ void GameActions()
       if (MovDelay[x][y] <= 0)
        RemoveField(x, y);
     }
+
+#if USE_NEW_SNAP_DELAY
+    if (Feld[x][y] == EL_ELEMENT_SNAPPING)
+    {
+      MovDelay[x][y]--;
+      if (MovDelay[x][y] <= 0)
+      {
+       RemoveField(x, y);
+       DrawLevelField(x, y);
+
+       TestIfElementTouchesCustomElement(x, y);        /* for empty space */
+      }
+    }
 #endif
 
 #if DEBUG
@@ -7666,11 +11150,13 @@ void GameActions()
       WasJustFalling[x][y]--;
     if (CheckCollision[x][y] > 0)
       CheckCollision[x][y]--;
+    if (CheckImpact[x][y] > 0)
+      CheckImpact[x][y]--;
 
     GfxFrame[x][y]++;
 
     /* reset finished pushing action (not done in ContinueMoving() to allow
-       continous pushing animation for elements with zero push delay) */
+       continuous pushing animation for elements with zero push delay) */
     if (GfxAction[x][y] == ACTION_PUSHING && !IS_MOVING(x, y))
     {
       ResetGfxAnimation(x, y);
@@ -7692,47 +11178,245 @@ void GameActions()
       }
     }
 #endif
-  }
+  }
+
+#if 0
+  debug_print_timestamp(0, "- time for pre-main loop:");
+#endif
+
+#if 0  // -------------------- !!! TEST ONLY !!! --------------------
+  SCAN_PLAYFIELD(x, y)
+  {
+    element = Feld[x][y];
+    graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+
+#if 1
+    {
+#if 1
+      int element2 = element;
+      int graphic2 = graphic;
+#else
+      int element2 = Feld[x][y];
+      int graphic2 = el_act_dir2img(element2, GfxAction[x][y], GfxDir[x][y]);
+#endif
+      int last_gfx_frame = GfxFrame[x][y];
+
+      if (graphic_info[graphic2].anim_global_sync)
+       GfxFrame[x][y] = FrameCounter;
+      else if (ANIM_MODE(graphic2) == ANIM_CE_VALUE)
+       GfxFrame[x][y] = CustomValue[x][y];
+      else if (ANIM_MODE(graphic2) == ANIM_CE_SCORE)
+       GfxFrame[x][y] = element_info[element2].collect_score;
+      else if (ANIM_MODE(graphic2) == ANIM_CE_DELAY)
+       GfxFrame[x][y] = ChangeDelay[x][y];
+
+      if (redraw && GfxFrame[x][y] != last_gfx_frame)
+       DrawLevelGraphicAnimation(x, y, graphic2);
+    }
+#else
+    ResetGfxFrame(x, y, TRUE);
+#endif
+
+#if 1
+    if (ANIM_MODE(graphic) == ANIM_RANDOM &&
+       IS_NEXT_FRAME(GfxFrame[x][y], graphic))
+      ResetRandomAnimationValue(x, y);
+#endif
+
+#if 1
+    SetRandomAnimationValue(x, y);
+#endif
+
+#if 1
+    PlayLevelSoundActionIfLoop(x, y, GfxAction[x][y]);
+#endif
+  }
+#endif // -------------------- !!! TEST ONLY !!! --------------------
+
+#if 0
+  debug_print_timestamp(0, "- time for TEST loop:     -->");
+#endif
+
+  SCAN_PLAYFIELD(x, y)
+  {
+    element = Feld[x][y];
+    graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+
+    ResetGfxFrame(x, y, TRUE);
+
+    if (ANIM_MODE(graphic) == ANIM_RANDOM &&
+       IS_NEXT_FRAME(GfxFrame[x][y], graphic))
+      ResetRandomAnimationValue(x, y);
+
+    SetRandomAnimationValue(x, y);
+
+    PlayLevelSoundActionIfLoop(x, y, GfxAction[x][y]);
+
+    if (IS_INACTIVE(element))
+    {
+      if (IS_ANIMATED(graphic))
+       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+      continue;
+    }
+
+    /* this may take place after moving, so 'element' may have changed */
+    if (IS_CHANGING(x, y) &&
+       (game.engine_version < VERSION_IDENT(3,0,7,1) || !Stop[x][y]))
+    {
+      int page = element_info[element].event_page_nr[CE_DELAY];
+
+#if 1
+      HandleElementChange(x, y, page);
+#else
+      if (CAN_CHANGE(element))
+       HandleElementChange(x, y, page);
+
+      if (HAS_ACTION(element))
+       ExecuteCustomElementAction(x, y, element, page);
+#endif
+
+      element = Feld[x][y];
+      graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+    }
+
+#if 0  // ---------------------------------------------------------------------
+
+    if (!IS_MOVING(x, y) && (CAN_FALL(element) || CAN_MOVE(element)))
+    {
+      StartMoving(x, y);
+
+      element = Feld[x][y];
+      graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+
+      if (IS_ANIMATED(graphic) &&
+         !IS_MOVING(x, y) &&
+         !Stop[x][y])
+       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+      if (IS_GEM(element) || element == EL_SP_INFOTRON)
+       DrawTwinkleOnField(x, y);
+    }
+    else if (IS_MOVING(x, y))
+      ContinueMoving(x, y);
+    else
+    {
+      switch (element)
+      {
+        case EL_ACID:
+        case EL_EXIT_OPEN:
+        case EL_EM_EXIT_OPEN:
+        case EL_SP_EXIT_OPEN:
+        case EL_STEEL_EXIT_OPEN:
+        case EL_EM_STEEL_EXIT_OPEN:
+        case EL_SP_TERMINAL:
+        case EL_SP_TERMINAL_ACTIVE:
+        case EL_EXTRA_TIME:
+        case EL_SHIELD_NORMAL:
+        case EL_SHIELD_DEADLY:
+         if (IS_ANIMATED(graphic))
+           DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+         break;
+
+        case EL_DYNAMITE_ACTIVE:
+        case EL_EM_DYNAMITE_ACTIVE:
+        case EL_DYNABOMB_PLAYER_1_ACTIVE:
+        case EL_DYNABOMB_PLAYER_2_ACTIVE:
+        case EL_DYNABOMB_PLAYER_3_ACTIVE:
+        case EL_DYNABOMB_PLAYER_4_ACTIVE:
+        case EL_SP_DISK_RED_ACTIVE:
+         CheckDynamite(x, y);
+         break;
+
+        case EL_AMOEBA_GROWING:
+         AmoebeWaechst(x, y);
+         break;
+
+        case EL_AMOEBA_SHRINKING:
+         AmoebaDisappearing(x, y);
+         break;
+
+#if !USE_NEW_AMOEBA_CODE
+        case EL_AMOEBA_WET:
+        case EL_AMOEBA_DRY:
+        case EL_AMOEBA_FULL:
+        case EL_BD_AMOEBA:
+        case EL_EMC_DRIPPER:
+         AmoebeAbleger(x, y);
+         break;
+#endif
 
-  for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
-  {
-    element = Feld[x][y];
-    graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+        case EL_GAME_OF_LIFE:
+        case EL_BIOMAZE:
+         Life(x, y);
+         break;
 
-    if (graphic_info[graphic].anim_global_sync)
-      GfxFrame[x][y] = FrameCounter;
+        case EL_EXIT_CLOSED:
+         CheckExit(x, y);
+         break;
 
-    if (ANIM_MODE(graphic) == ANIM_RANDOM &&
-       IS_NEXT_FRAME(GfxFrame[x][y], graphic))
-      ResetRandomAnimationValue(x, y);
+        case EL_EM_EXIT_CLOSED:
+         CheckExitEM(x, y);
+         break;
 
-    SetRandomAnimationValue(x, y);
+        case EL_STEEL_EXIT_CLOSED:
+         CheckExitSteel(x, y);
+         break;
 
-    PlayLevelSoundActionIfLoop(x, y, GfxAction[x][y]);
+        case EL_EM_STEEL_EXIT_CLOSED:
+         CheckExitSteelEM(x, y);
+         break;
 
-    if (IS_INACTIVE(element))
-    {
-      if (IS_ANIMATED(graphic))
-       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+        case EL_SP_EXIT_CLOSED:
+         CheckExitSP(x, y);
+         break;
 
-      continue;
-    }
+        case EL_EXPANDABLE_WALL_GROWING:
+        case EL_EXPANDABLE_STEELWALL_GROWING:
+         MauerWaechst(x, y);
+         break;
 
-    /* this may take place after moving, so 'element' may have changed */
-    if (IS_CHANGING(x, y) &&
-       (game.engine_version < VERSION_IDENT(3,0,7,1) || !Stop[x][y]))
-    {
-#if 0
-      ChangeElement(x, y, ChangePage[x][y] != -1 ? ChangePage[x][y] :
-                   element_info[element].event_page_nr[CE_DELAY]);
-#else
-      ChangeElement(x, y, element_info[element].event_page_nr[CE_DELAY]);
-#endif
+        case EL_EXPANDABLE_WALL:
+        case EL_EXPANDABLE_WALL_HORIZONTAL:
+        case EL_EXPANDABLE_WALL_VERTICAL:
+        case EL_EXPANDABLE_WALL_ANY:
+        case EL_BD_EXPANDABLE_WALL:
+         MauerAbleger(x, y);
+         break;
 
-      element = Feld[x][y];
-      graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+        case EL_EXPANDABLE_STEELWALL_HORIZONTAL:
+        case EL_EXPANDABLE_STEELWALL_VERTICAL:
+        case EL_EXPANDABLE_STEELWALL_ANY:
+         MauerAblegerStahl(x, y);
+         break;
+
+        case EL_FLAMES:
+         CheckForDragon(x, y);
+         break;
+
+        case EL_EXPLOSION:
+         break;
+
+        case EL_ELEMENT_SNAPPING:
+        case EL_DIAGONAL_SHRINKING:
+        case EL_DIAGONAL_GROWING:
+       {
+         graphic =
+           el_act_dir2img(GfxElement[x][y], GfxAction[x][y],GfxDir[x][y]);
+
+         DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+         break;
+       }
+
+        default:
+         if (IS_ANIMATED(graphic) && !IS_CHANGING(x, y))
+           DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+         break;
+      }
     }
 
+#else  // ---------------------------------------------------------------------
+
     if (!IS_MOVING(x, y) && (CAN_FALL(element) || CAN_MOVE(element)))
     {
       StartMoving(x, y);
@@ -7746,11 +11430,14 @@ void GameActions()
        DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
 
       if (IS_GEM(element) || element == EL_SP_INFOTRON)
-       EdelsteinFunkeln(x, y);
+       DrawTwinkleOnField(x, y);
     }
     else if ((element == EL_ACID ||
              element == EL_EXIT_OPEN ||
+             element == EL_EM_EXIT_OPEN ||
              element == EL_SP_EXIT_OPEN ||
+             element == EL_STEEL_EXIT_OPEN ||
+             element == EL_EM_STEEL_EXIT_OPEN ||
              element == EL_SP_TERMINAL ||
              element == EL_SP_TERMINAL_ACTIVE ||
              element == EL_EXTRA_TIME ||
@@ -7776,22 +11463,44 @@ void GameActions()
       Life(x, y);
     else if (element == EL_EXIT_CLOSED)
       CheckExit(x, y);
+    else if (element == EL_EM_EXIT_CLOSED)
+      CheckExitEM(x, y);
+    else if (element == EL_STEEL_EXIT_CLOSED)
+      CheckExitSteel(x, y);
+    else if (element == EL_EM_STEEL_EXIT_CLOSED)
+      CheckExitSteelEM(x, y);
     else if (element == EL_SP_EXIT_CLOSED)
       CheckExitSP(x, y);
-    else if (element == EL_EXPANDABLE_WALL_GROWING)
+    else if (element == EL_EXPANDABLE_WALL_GROWING ||
+            element == EL_EXPANDABLE_STEELWALL_GROWING)
       MauerWaechst(x, y);
     else if (element == EL_EXPANDABLE_WALL ||
             element == EL_EXPANDABLE_WALL_HORIZONTAL ||
             element == EL_EXPANDABLE_WALL_VERTICAL ||
-            element == EL_EXPANDABLE_WALL_ANY)
+            element == EL_EXPANDABLE_WALL_ANY ||
+            element == EL_BD_EXPANDABLE_WALL)
       MauerAbleger(x, y);
+    else if (element == EL_EXPANDABLE_STEELWALL_HORIZONTAL ||
+            element == EL_EXPANDABLE_STEELWALL_VERTICAL ||
+            element == EL_EXPANDABLE_STEELWALL_ANY)
+      MauerAblegerStahl(x, y);
     else if (element == EL_FLAMES)
       CheckForDragon(x, y);
     else if (element == EL_EXPLOSION)
       ;        /* drawing of correct explosion animation is handled separately */
+    else if (element == EL_ELEMENT_SNAPPING ||
+            element == EL_DIAGONAL_SHRINKING ||
+            element == EL_DIAGONAL_GROWING)
+    {
+      graphic = el_act_dir2img(GfxElement[x][y], GfxAction[x][y],GfxDir[x][y]);
+
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+    }
     else if (IS_ANIMATED(graphic) && !IS_CHANGING(x, y))
       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
 
+#endif // ---------------------------------------------------------------------
+
     if (IS_BELT_ACTIVE(element))
       PlayLevelSoundAction(x, y, ACTION_ACTIVE);
 
@@ -7805,7 +11514,10 @@ void GameActions()
           element == EL_MAGIC_WALL_EMPTYING ||
           element == EL_BD_MAGIC_WALL_FULL ||
           element == EL_BD_MAGIC_WALL_ACTIVE ||
-          element == EL_BD_MAGIC_WALL_EMPTYING) &&
+          element == EL_BD_MAGIC_WALL_EMPTYING ||
+          element == EL_DC_MAGIC_WALL_FULL ||
+          element == EL_DC_MAGIC_WALL_ACTIVE ||
+          element == EL_DC_MAGIC_WALL_EMPTYING) &&
          ABS(x-jx) + ABS(y-jy) < ABS(magic_wall_x-jx) + ABS(magic_wall_y-jy))
       {
        magic_wall_x = x;
@@ -7814,6 +11526,10 @@ void GameActions()
     }
   }
 
+#if 0
+  debug_print_timestamp(0, "- time for MAIN loop:     -->");
+#endif
+
 #if USE_NEW_AMOEBA_CODE
   /* new experimental amoeba growth stuff */
   if (!(FrameCounter % 8))
@@ -7830,6 +11546,7 @@ void GameActions()
          (element == EL_EMPTY ||
           CAN_GROW_INTO(element) ||
           element == EL_QUICKSAND_EMPTY ||
+          element == EL_QUICKSAND_FAST_EMPTY ||
           element == EL_ACID_SPLASH_LEFT ||
           element == EL_ACID_SPLASH_RIGHT))
       {
@@ -7851,7 +11568,7 @@ void GameActions()
   {
     game.explosions_delayed = FALSE;
 
-    for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+    SCAN_PLAYFIELD(x, y)
     {
       element = Feld[x][y];
 
@@ -7876,6 +11593,10 @@ void GameActions()
          element == EL_BD_MAGIC_WALL_ACTIVE ||
          element == EL_BD_MAGIC_WALL_EMPTYING)
        PlayLevelSound(magic_wall_x, magic_wall_y, SND_BD_MAGIC_WALL_ACTIVE);
+      else if (element == EL_DC_MAGIC_WALL_FULL ||
+              element == EL_DC_MAGIC_WALL_ACTIVE ||
+              element == EL_DC_MAGIC_WALL_EMPTYING)
+       PlayLevelSound(magic_wall_x, magic_wall_y, SND_DC_MAGIC_WALL_ACTIVE);
       else
        PlayLevelSound(magic_wall_x, magic_wall_y, SND_MAGIC_WALL_ACTIVE);
     }
@@ -7885,7 +11606,7 @@ void GameActions()
       game.magic_wall_time_left--;
       if (!game.magic_wall_time_left)
       {
-       for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+       SCAN_PLAYFIELD(x, y)
        {
          element = Feld[x][y];
 
@@ -7901,6 +11622,12 @@ void GameActions()
            Feld[x][y] = EL_BD_MAGIC_WALL_DEAD;
            DrawLevelField(x, y);
          }
+         else if (element == EL_DC_MAGIC_WALL_ACTIVE ||
+                  element == EL_DC_MAGIC_WALL_FULL)
+         {
+           Feld[x][y] = EL_DC_MAGIC_WALL_DEAD;
+           DrawLevelField(x, y);
+         }
        }
 
        game.magic_wall_active = FALSE;
@@ -7924,6 +11651,22 @@ void GameActions()
       CloseAllOpenTimegates();
   }
 
+  if (game.lenses_time_left > 0)
+  {
+    game.lenses_time_left--;
+
+    if (game.lenses_time_left == 0)
+      RedrawAllInvisibleElementsForLenses();
+  }
+
+  if (game.magnify_time_left > 0)
+  {
+    game.magnify_time_left--;
+
+    if (game.magnify_time_left == 0)
+      RedrawAllInvisibleElementsForMagnifier();
+  }
+
   for (i = 0; i < MAX_PLAYERS; i++)
   {
     struct PlayerInfo *player = &stored_player[i];
@@ -7937,48 +11680,7 @@ void GameActions()
     }
   }
 
-  if (TimeFrames >= FRAMES_PER_SECOND)
-  {
-    TimeFrames = 0;
-    TapeTime++;
-
-    for (i = 0; i < MAX_PLAYERS; i++)
-    {
-      struct PlayerInfo *player = &stored_player[i];
-
-      if (SHIELD_ON(player))
-      {
-       player->shield_normal_time_left--;
-
-       if (player->shield_deadly_time_left > 0)
-         player->shield_deadly_time_left--;
-      }
-    }
-
-    if (!level.use_step_counter)
-    {
-      TimePlayed++;
-
-      if (TimeLeft > 0)
-      {
-       TimeLeft--;
-
-       if (TimeLeft <= 10 && setup.time_limit)
-         PlaySoundStereo(SND_GAME_RUNNING_OUT_OF_TIME, SOUND_MIDDLE);
-
-       DrawGameValue_Time(TimeLeft);
-
-       if (!TimeLeft && setup.time_limit)
-         for (i = 0; i < MAX_PLAYERS; i++)
-           KillHero(&stored_player[i]);
-      }
-      else if (level.time == 0 && !AllPlayersGone) /* level w/o time limit */
-       DrawGameValue_Time(TimePlayed);
-    }
-
-    if (tape.recording || tape.playing)
-      DrawVideoDisplay(VIDEO_STATE_TIME_ON, TapeTime);
-  }
+  CheckLevelTime();
 
   DrawAllPlayers();
   PlayAllPlayersSound();
@@ -8002,31 +11704,7 @@ void GameActions()
     redraw_mask |= REDRAW_FPS;
   }
 
-#if USE_NEW_MOVE_DELAY
   AdvanceFrameAndPlayerCounters(-1);   /* advance counters for all players */
-#else
-  FrameCounter++;
-  TimeFrames++;
-
-  for (i = 0; i < MAX_PLAYERS; i++)
-  {
-    int move_frames =
-      MOVE_DELAY_NORMAL_SPEED /  stored_player[i].move_delay_value;
-
-    stored_player[i].Frame += move_frames;
-
-    if (stored_player[i].MovPos != 0)
-      stored_player[i].StepFrame += move_frames;
-
-#if USE_NEW_MOVE_DELAY
-    if (stored_player[i].move_delay > 0)
-      stored_player[i].move_delay--;
-#endif
-
-    if (stored_player[i].drop_delay > 0)
-      stored_player[i].drop_delay--;
-  }
-#endif
 
   if (local_player->show_envelope != 0 && local_player->MovPos == 0)
   {
@@ -8035,11 +11713,14 @@ void GameActions()
     local_player->show_envelope = 0;
   }
 
-#if USE_NEW_RANDOMIZE
+#if 0
+  debug_print_timestamp(0, "stop main loop profiling ");
+  printf("----------------------------------------------------------\n");
+#endif
+
   /* use random number generator in every frame to make it less predictable */
   if (game.engine_version >= VERSION_IDENT(3,1,1,0))
     RND(1);
-#endif
 }
 
 static boolean AllPlayersInSight(struct PlayerInfo *player, int x, int y)
@@ -8083,25 +11764,85 @@ static boolean AllPlayersInVisibleScreen()
 
 void ScrollLevel(int dx, int dy)
 {
+#if 1
+  static Bitmap *bitmap_db_field2 = NULL;
   int softscroll_offset = (setup.soft_scrolling ? TILEX : 0);
   int x, y;
+#else
+  int i, x, y;
+#endif
+
+#if 0
+  /* !!! THIS IS APPARENTLY WRONG FOR PLAYER RELOCATION !!! */
+  /* only horizontal XOR vertical scroll direction allowed */
+  if ((dx == 0 && dy == 0) || (dx != 0 && dy != 0))
+    return;
+#endif
+
+#if 1
+  if (bitmap_db_field2 == NULL)
+    bitmap_db_field2 = CreateBitmap(FXSIZE, FYSIZE, DEFAULT_DEPTH);
+
+  /* needed when blitting directly to same bitmap -- should not be needed with
+     recent SDL libraries, but apparently does not work in 1.2.11 directly */
+  BlitBitmap(drawto_field, bitmap_db_field2,
+            FX + TILEX * (dx == -1) - softscroll_offset,
+            FY + TILEY * (dy == -1) - softscroll_offset,
+            SXSIZE - TILEX * (dx != 0) + 2 * softscroll_offset,
+            SYSIZE - TILEY * (dy != 0) + 2 * softscroll_offset,
+            FX + TILEX * (dx == 1) - softscroll_offset,
+            FY + TILEY * (dy == 1) - softscroll_offset);
+  BlitBitmap(bitmap_db_field2, drawto_field,
+            FX + TILEX * (dx == 1) - softscroll_offset,
+            FY + TILEY * (dy == 1) - softscroll_offset,
+            SXSIZE - TILEX * (dx != 0) + 2 * softscroll_offset,
+            SYSIZE - TILEY * (dy != 0) + 2 * softscroll_offset,
+            FX + TILEX * (dx == 1) - softscroll_offset,
+            FY + TILEY * (dy == 1) - softscroll_offset);
+
+#else
+
+#if 1
+  /* !!! DOES NOT WORK FOR DIAGONAL PLAYER RELOCATION !!! */
+  int xsize = (BX2 - BX1 + 1);
+  int ysize = (BY2 - BY1 + 1);
+  int start = (dx != 0 ? (dx == -1 ? BX1 : BX2) : (dy == -1 ? BY1 : BY2));
+  int end   = (dx != 0 ? (dx == -1 ? BX2 : BX1) : (dy == -1 ? BY2 : BY1));
+  int step  = (start < end ? +1 : -1);
+
+  for (i = start; i != end; i += step)
+  {
+    BlitBitmap(drawto_field, drawto_field,
+              FX + TILEX * (dx != 0 ? i + step : 0),
+              FY + TILEY * (dy != 0 ? i + step : 0),
+              TILEX * (dx != 0 ? 1 : xsize),
+              TILEY * (dy != 0 ? 1 : ysize),
+              FX + TILEX * (dx != 0 ? i : 0),
+              FY + TILEY * (dy != 0 ? i : 0));
+  }
+
+#else
+
+  int softscroll_offset = (setup.soft_scrolling ? TILEX : 0);
 
   BlitBitmap(drawto_field, drawto_field,
             FX + TILEX * (dx == -1) - softscroll_offset,
             FY + TILEY * (dy == -1) - softscroll_offset,
-            SXSIZE - TILEX * (dx!=0) + 2 * softscroll_offset,
-            SYSIZE - TILEY * (dy!=0) + 2 * softscroll_offset,
+            SXSIZE - TILEX * (dx != 0) + 2 * softscroll_offset,
+            SYSIZE - TILEY * (dy != 0) + 2 * softscroll_offset,
             FX + TILEX * (dx == 1) - softscroll_offset,
             FY + TILEY * (dy == 1) - softscroll_offset);
+#endif
+#endif
 
-  if (dx)
+  if (dx != 0)
   {
     x = (dx == 1 ? BX1 : BX2);
     for (y = BY1; y <= BY2; y++)
       DrawScreenField(x, y);
   }
 
-  if (dy)
+  if (dy != 0)
   {
     y = (dy == 1 ? BY1 : BY2);
     for (x = BX1; x <= BX2; x++)
@@ -8117,11 +11858,6 @@ static boolean canFallDown(struct PlayerInfo *player)
 
   return (IN_LEV_FIELD(jx, jy + 1) &&
          (IS_FREE(jx, jy + 1) ||
-#if USE_NEW_BLOCK_STYLE
-#if USE_GRAVITY_BUGFIX_OLD
-          Feld[jx][jy + 1] == EL_PLAYER_IS_LEAVING ||
-#endif
-#endif
           (Feld[jx][jy + 1] == EL_ACID && player->can_fall_into_acid)) &&
          IS_WALKABLE_FROM(Feld[jx][jy], MV_DOWN) &&
          !IS_WALKABLE_INSIDE(Feld[jx][jy]));
@@ -8160,11 +11896,15 @@ static boolean canMoveToValidFieldWithGravity(int x, int y, int move_dir)
 
 static void CheckGravityMovement(struct PlayerInfo *player)
 {
+#if USE_PLAYER_GRAVITY
+  if (player->gravity && !player->programmed_action)
+#else
   if (game.gravity && !player->programmed_action)
+#endif
   {
     int move_dir_horizontal = player->effective_action & MV_HORIZONTAL;
     int move_dir_vertical   = player->effective_action & MV_VERTICAL;
-    boolean player_is_snapping = player->effective_action & JOY_BUTTON_1;
+    boolean player_is_snapping = (player->effective_action & JOY_BUTTON_1);
     int jx = player->jx, jy = player->jy;
     boolean player_is_moving_to_valid_field =
       (!player_is_snapping &&
@@ -8182,7 +11922,11 @@ static void CheckGravityMovementWhenNotMoving(struct PlayerInfo *player)
 {
   return CheckGravityMovement(player);
 
+#if USE_PLAYER_GRAVITY
+  if (player->gravity && !player->programmed_action)
+#else
   if (game.gravity && !player->programmed_action)
+#endif
   {
     int jx = player->jx, jy = player->jy;
     boolean field_under_player_is_free =
@@ -8209,26 +11953,49 @@ boolean MovePlayerOneStep(struct PlayerInfo *player,
 {
   int jx = player->jx, jy = player->jy;
   int new_jx = jx + dx, new_jy = jy + dy;
+#if !USE_FIXED_DONT_RUN_INTO
   int element;
+#endif
   int can_move;
+  boolean player_can_move = !player->cannot_move;
 
   if (!player->active || (!dx && !dy))
-    return MF_NO_ACTION;
+    return MP_NO_ACTION;
 
   player->MovDir = (dx < 0 ? MV_LEFT :
                    dx > 0 ? MV_RIGHT :
                    dy < 0 ? MV_UP :
-                   dy > 0 ? MV_DOWN :  MV_NO_MOVING);
+                   dy > 0 ? MV_DOWN :  MV_NONE);
 
   if (!IN_LEV_FIELD(new_jx, new_jy))
-    return MF_NO_ACTION;
+    return MP_NO_ACTION;
+
+  if (!player_can_move)
+  {
+    if (player->MovPos == 0)
+    {
+      player->is_moving = FALSE;
+      player->is_digging = FALSE;
+      player->is_collecting = FALSE;
+      player->is_snapping = FALSE;
+      player->is_pushing = FALSE;
+    }
+  }
 
+#if 1
+  if (!options.network && game.centered_player_nr == -1 &&
+      !AllPlayersInSight(player, new_jx, new_jy))
+    return MP_NO_ACTION;
+#else
   if (!options.network && !AllPlayersInSight(player, new_jx, new_jy))
-    return MF_NO_ACTION;
+    return MP_NO_ACTION;
+#endif
 
+#if !USE_FIXED_DONT_RUN_INTO
   element = MovingOrBlocked2ElementIfNotLeaving(new_jx, new_jy);
 
-  if (DONT_RUN_INTO(element))
+  /* (moved to DigField()) */
+  if (player_can_move && DONT_RUN_INTO(element))
   {
     if (element == EL_ACID && dx == 0 && dy == 1)
     {
@@ -8237,21 +12004,22 @@ boolean MovePlayerOneStep(struct PlayerInfo *player,
       InitMovingField(jx, jy, MV_DOWN);
       Store[jx][jy] = EL_ACID;
       ContinueMoving(jx, jy);
-      BuryHero(player);
+      BuryPlayer(player);
     }
     else
-      TestIfHeroRunsIntoBadThing(jx, jy, player->MovDir);
+      TestIfPlayerRunsIntoBadThing(jx, jy, player->MovDir);
 
-    return MF_MOVING;
+    return MP_MOVING;
   }
+#endif
 
   can_move = DigField(player, jx, jy, new_jx, new_jy, real_dx,real_dy, DF_DIG);
-  if (can_move != MF_MOVING)
+  if (can_move != MP_MOVING)
     return can_move;
 
   /* check if DigField() has caused relocation of the player */
   if (player->jx != jx || player->jy != jy)
-    return MF_NO_ACTION;       /* <-- !!! CHECK THIS [-> MF_ACTION ?] !!! */
+    return MP_NO_ACTION;       /* <-- !!! CHECK THIS [-> MP_ACTION ?] !!! */
 
   StorePlayer[jx][jy] = 0;
   player->last_jx = jx;
@@ -8260,6 +12028,12 @@ boolean MovePlayerOneStep(struct PlayerInfo *player,
   player->jy = new_jy;
   StorePlayer[new_jx][new_jy] = player->element_nr;
 
+  if (player->move_delay_value_next != -1)
+  {
+    player->move_delay_value = player->move_delay_value_next;
+    player->move_delay_value_next = -1;
+  }
+
   player->MovPos =
     (dx > 0 || dy > 0 ? -1 : 1) * (TILEX - TILEX / player->move_delay_value);
 
@@ -8267,16 +12041,23 @@ boolean MovePlayerOneStep(struct PlayerInfo *player,
 
   PlayerVisit[jx][jy] = FrameCounter;
 
+#if USE_UFAST_PLAYER_EXIT_BUGFIX
+  player->is_moving = TRUE;
+#endif
+
+#if 1
+  /* should better be called in MovePlayer(), but this breaks some tapes */
   ScrollPlayer(player, SCROLL_INIT);
+#endif
 
-  return MF_MOVING;
+  return MP_MOVING;
 }
 
 boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
 {
   int jx = player->jx, jy = player->jy;
   int old_jx = jx, old_jy = jy;
-  int moved = MF_NO_ACTION;
+  int moved = MP_NO_ACTION;
 
   if (!player->active)
     return FALSE;
@@ -8295,21 +12076,13 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
     return FALSE;
   }
 
-#if USE_NEW_MOVE_DELAY
   if (player->move_delay > 0)
-#else
-  if (!FrameReached(&player->move_delay, player->move_delay_value))
-#endif
-  {
     return FALSE;
-  }
 
-#if USE_NEW_MOVE_DELAY
   player->move_delay = -1;             /* set to "uninitialized" value */
-#endif
 
   /* store if player is automatically moved to next field */
-  player->is_auto_moving = (player->programmed_action != MV_NO_MOVING);
+  player->is_auto_moving = (player->programmed_action != MV_NONE);
 
   /* remove the last programmed player action */
   player->programmed_action = 0;
@@ -8334,11 +12107,7 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
       ScrollPlayer(player, SCROLL_GO_ON);
       ScrollScreen(NULL, SCROLL_GO_ON);
 
-#if USE_NEW_MOVE_DELAY
       AdvanceFrameAndPlayerCounters(player->index_nr);
-#else
-      FrameCounter++;
-#endif
 
       DrawAllPlayers();
       BackToFront();
@@ -8347,6 +12116,8 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
     player->move_delay_value = original_move_delay_value;
   }
 
+  player->is_active = FALSE;
+
   if (player->last_move_dir & MV_HORIZONTAL)
   {
     if (!(moved |= MovePlayerOneStep(player, 0, dy, dx, dy)))
@@ -8358,14 +12129,31 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
       moved |= MovePlayerOneStep(player, 0, dy, dx, dy);
   }
 
+#if USE_FIXED_BORDER_RUNNING_GFX
+  if (!moved && !player->is_active)
+  {
+    player->is_moving = FALSE;
+    player->is_digging = FALSE;
+    player->is_collecting = FALSE;
+    player->is_snapping = FALSE;
+    player->is_pushing = FALSE;
+  }
+#endif
+
   jx = player->jx;
   jy = player->jy;
 
-  if (moved & MF_MOVING && !ScreenMovPos &&
+#if 1
+  if (moved & MP_MOVING && !ScreenMovPos &&
+      (player->index_nr == game.centered_player_nr ||
+       game.centered_player_nr == -1))
+#else
+  if (moved & MP_MOVING && !ScreenMovPos &&
       (player == local_player || !options.network))
+#endif
   {
     int old_scroll_x = scroll_x, old_scroll_y = scroll_y;
-    int offset = (setup.scroll_delay ? 3 : 0);
+    int offset = game.scroll_delay_value;
 
     if (!IN_VIS_FIELD(SCREENX(jx), SCREENY(jy)))
     {
@@ -8417,12 +12205,22 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
 
     if (scroll_x != old_scroll_x || scroll_y != old_scroll_y)
     {
+#if 1
+      if (!options.network && game.centered_player_nr == -1 &&
+         !AllPlayersInVisibleScreen())
+      {
+       scroll_x = old_scroll_x;
+       scroll_y = old_scroll_y;
+      }
+      else
+#else
       if (!options.network && !AllPlayersInVisibleScreen())
       {
        scroll_x = old_scroll_x;
        scroll_y = old_scroll_y;
       }
       else
+#endif
       {
        ScrollScreen(player, SCROLL_INIT);
        ScrollLevel(old_scroll_x - scroll_x, old_scroll_y - scroll_y);
@@ -8432,7 +12230,7 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
 
   player->StepFrame = 0;
 
-  if (moved & MF_MOVING)
+  if (moved & MP_MOVING)
   {
     if (old_jx != jx && old_jy == jy)
       player->MovDir = (old_jx < jx ? MV_RIGHT : MV_LEFT);
@@ -8446,40 +12244,40 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
     player->is_snapping = FALSE;
     player->is_switching = FALSE;
     player->is_dropping = FALSE;
+    player->is_dropping_pressed = FALSE;
+    player->drop_pressed_delay = 0;
+
+#if 0
+    /* should better be called here than above, but this breaks some tapes */
+    ScrollPlayer(player, SCROLL_INIT);
+#endif
   }
   else
   {
     CheckGravityMovementWhenNotMoving(player);
 
-    /*
-    player->last_move_dir = MV_NO_MOVING;
-    */
     player->is_moving = FALSE;
 
-#if USE_NEW_MOVE_STYLE
-    /* player is ALLOWED to move, but CANNOT move (something blocks his way) */
-    /* ensure that the player is also allowed to move in the next frame */
-    /* (currently, the player is forced to wait eight frames before he can try
-       again!!!) */
+    /* at this point, the player is allowed to move, but cannot move right now
+       (e.g. because of something blocking the way) -- ensure that the player
+       is also allowed to move in the next frame (in old versions before 3.1.1,
+       the player was forced to wait again for eight frames before next try) */
 
     if (game.engine_version >= VERSION_IDENT(3,1,1,0))
       player->move_delay = 0;  /* allow direct movement in the next frame */
-#endif
   }
 
-#if USE_NEW_MOVE_DELAY
   if (player->move_delay == -1)                /* not yet initialized by DigField() */
     player->move_delay = player->move_delay_value;
-#endif
 
   if (game.engine_version < VERSION_IDENT(3,0,7,0))
   {
-    TestIfHeroTouchesBadThing(jx, jy);
+    TestIfPlayerTouchesBadThing(jx, jy);
     TestIfPlayerTouchesCustomElement(jx, jy);
   }
 
   if (!player->active)
-    RemoveHero(player);
+    RemovePlayer(player);
 
   return moved;
 }
@@ -8490,16 +12288,22 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
   int last_jx = player->last_jx, last_jy = player->last_jy;
   int move_stepsize = TILEX / player->move_delay_value;
 
-  if (!player->active || !player->MovPos)
+#if USE_NEW_PLAYER_SPEED
+  if (!player->active)
+    return;
+
+  if (player->MovPos == 0 && mode == SCROLL_GO_ON)     /* player not moving */
+    return;
+#else
+  if (!player->active || player->MovPos == 0)
     return;
+#endif
 
   if (mode == SCROLL_INIT)
   {
     player->actual_frame_counter = FrameCounter;
     player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
-#if USE_NEW_BLOCK_STYLE
-
     if ((player->block_last_field || player->block_delay_adjustment > 0) &&
        Feld[last_jx][last_jy] == EL_EMPTY)
     {
@@ -8511,8 +12315,11 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
       {
        last_field_block_delay += player->move_delay_value;
 
-#if USE_GRAVITY_BUGFIX_NEW
        /* when blocking enabled, prevent moving up despite gravity */
+#if USE_PLAYER_GRAVITY
+       if (player->gravity && player->MovDir == MV_UP)
+         block_delay_adjustment = -1;
+#else
        if (game.gravity && player->MovDir == MV_UP)
          block_delay_adjustment = -1;
 #endif
@@ -8524,37 +12331,35 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
       Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
       MovDelay[last_jx][last_jy] = last_field_block_delay + 1;
     }
-#else
-#if USE_NEW_MOVE_STYLE
-    if ((game.engine_version < VERSION_IDENT(3,1,1,0) ||
-        player->block_last_field) &&
-       Feld[last_jx][last_jy] == EL_EMPTY)
-      Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
-#else
-    if (Feld[last_jx][last_jy] == EL_EMPTY)
-      Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
-#endif
-#endif
 
+#if USE_NEW_PLAYER_SPEED
+    if (player->MovPos != 0)   /* player has not yet reached destination */
+      return;
+#else
     return;
+#endif
   }
   else if (!FrameReached(&player->actual_frame_counter, 1))
     return;
 
-  player->MovPos += (player->MovPos > 0 ? -1 : 1) * move_stepsize;
-  player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
+#if USE_NEW_PLAYER_SPEED
+  if (player->MovPos != 0)
+  {
+    player->MovPos += (player->MovPos > 0 ? -1 : 1) * move_stepsize;
+    player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
-#if USE_NEW_BLOCK_STYLE
+    /* before DrawPlayer() to draw correct player graphic for this case */
+    if (player->MovPos == 0)
+      CheckGravityMovement(player);
+  }
 #else
-  if (!player->block_last_field &&
-      Feld[last_jx][last_jy] == EL_PLAYER_IS_LEAVING)
-
-    RemoveField(last_jx, last_jy);
-#endif
+  player->MovPos += (player->MovPos > 0 ? -1 : 1) * move_stepsize;
+  player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
   /* before DrawPlayer() to draw correct player graphic for this case */
   if (player->MovPos == 0)
     CheckGravityMovement(player);
+#endif
 
   if (player->MovPos == 0)     /* player reached destination field */
   {
@@ -8572,27 +12377,22 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
       }
     }
 
-#if USE_NEW_BLOCK_STYLE
-#else
-    if (player->block_last_field &&
-       Feld[last_jx][last_jy] == EL_PLAYER_IS_LEAVING)
-
-      RemoveField(last_jx, last_jy);
-#endif
-
     player->last_jx = jx;
     player->last_jy = jy;
 
     if (Feld[jx][jy] == EL_EXIT_OPEN ||
+       Feld[jx][jy] == EL_EM_EXIT_OPEN ||
+       Feld[jx][jy] == EL_STEEL_EXIT_OPEN ||
+       Feld[jx][jy] == EL_EM_STEEL_EXIT_OPEN ||
        Feld[jx][jy] == EL_SP_EXIT_OPEN ||
        Feld[jx][jy] == EL_SP_EXIT_OPENING)     /* <-- special case */
     {
       DrawPlayer(player);      /* needed here only to cleanup last field */
-      RemoveHero(player);
+      RemovePlayer(player);
 
       if (local_player->friends_still_needed == 0 ||
          IS_SP_ELEMENT(Feld[jx][jy]))
-       player->LevelSolved = player->GameOver = TRUE;
+       PlayerWins(player);
     }
 
     /* this breaks one level: "machine", level 000 */
@@ -8621,11 +12421,14 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
       CheckTriggeredElementChangeByPlayer(jx, jy, new_element,
                                          CE_PLAYER_ENTERS_X,
                                          player->index_bit, enter_side);
+
+      CheckTriggeredElementChangeBySide(jx, jy, player->element_nr,
+                                       CE_MOVE_OF_X, move_direction);
     }
 
     if (game.engine_version >= VERSION_IDENT(3,0,7,0))
     {
-      TestIfHeroTouchesBadThing(jx, jy);
+      TestIfPlayerTouchesBadThing(jx, jy);
       TestIfPlayerTouchesCustomElement(jx, jy);
 
       /* needed because pushed element has not yet reached its destination,
@@ -8634,10 +12437,10 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
        TestIfElementTouchesCustomElement(jx, jy);      /* for empty space */
 
       if (!player->active)
-       RemoveHero(player);
+       RemovePlayer(player);
     }
 
-    if (level.use_step_counter)
+    if (!local_player->LevelSolved && level.use_step_counter)
     {
       int i;
 
@@ -8648,16 +12451,31 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
        TimeLeft--;
 
        if (TimeLeft <= 10 && setup.time_limit)
-         PlaySoundStereo(SND_GAME_RUNNING_OUT_OF_TIME, SOUND_MIDDLE);
+         PlaySound(SND_GAME_RUNNING_OUT_OF_TIME);
+
+#if 1
+       game_control_value[GAME_CONTROL_TIME] = TimeLeft;
 
+       DisplayGameControlValues();
+#else
        DrawGameValue_Time(TimeLeft);
+#endif
 
        if (!TimeLeft && setup.time_limit)
          for (i = 0; i < MAX_PLAYERS; i++)
-           KillHero(&stored_player[i]);
+           KillPlayer(&stored_player[i]);
+      }
+#if 1
+      else if (level.time == 0 && !AllPlayersGone) /* level w/o time limit */
+      {
+       game_control_value[GAME_CONTROL_TIME] = TimePlayed;
+
+       DisplayGameControlValues();
       }
+#else
       else if (level.time == 0 && !AllPlayersGone) /* level w/o time limit */
        DrawGameValue_Time(TimePlayed);
+#endif
     }
 
     if (tape.single_step && tape.recording && !tape.pausing &&
@@ -8691,7 +12509,7 @@ void ScrollScreen(struct PlayerInfo *player, int mode)
     redraw_mask |= REDRAW_FIELD;
   }
   else
-    ScreenMovDir = MV_NO_MOVING;
+    ScreenMovDir = MV_NONE;
 }
 
 void TestIfPlayerTouchesCustomElement(int x, int y)
@@ -8771,7 +12589,94 @@ void TestIfPlayerTouchesCustomElement(int x, int y)
   }
 }
 
+#if USE_ELEMENT_TOUCHING_BUGFIX
+
 void TestIfElementTouchesCustomElement(int x, int y)
+{
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+  static int trigger_sides[4][2] =
+  {
+    /* center side     border side */
+    { CH_SIDE_TOP,     CH_SIDE_BOTTOM  },      /* check top    */
+    { CH_SIDE_LEFT,    CH_SIDE_RIGHT   },      /* check left   */
+    { CH_SIDE_RIGHT,   CH_SIDE_LEFT    },      /* check right  */
+    { CH_SIDE_BOTTOM,  CH_SIDE_TOP     }       /* check bottom */
+  };
+  static int touch_dir[4] =
+  {
+    MV_LEFT | MV_RIGHT,
+    MV_UP   | MV_DOWN,
+    MV_UP   | MV_DOWN,
+    MV_LEFT | MV_RIGHT
+  };
+  boolean change_center_element = FALSE;
+  int center_element = Feld[x][y];     /* should always be non-moving! */
+  int border_element_old[NUM_DIRECTIONS];
+  int i;
+
+  for (i = 0; i < NUM_DIRECTIONS; i++)
+  {
+    int xx = x + xy[i][0];
+    int yy = y + xy[i][1];
+    int border_element;
+
+    border_element_old[i] = -1;
+
+    if (!IN_LEV_FIELD(xx, yy))
+      continue;
+
+    if (game.engine_version < VERSION_IDENT(3,0,7,0))
+      border_element = Feld[xx][yy];   /* may be moving! */
+    else if (!IS_MOVING(xx, yy) && !IS_BLOCKED(xx, yy))
+      border_element = Feld[xx][yy];
+    else if (MovDir[xx][yy] & touch_dir[i])    /* elements are touching */
+      border_element = MovingOrBlocked2Element(xx, yy);
+    else
+      continue;                        /* center and border element do not touch */
+
+    border_element_old[i] = border_element;
+  }
+
+  for (i = 0; i < NUM_DIRECTIONS; i++)
+  {
+    int xx = x + xy[i][0];
+    int yy = y + xy[i][1];
+    int center_side = trigger_sides[i][0];
+    int border_element = border_element_old[i];
+
+    if (border_element == -1)
+      continue;
+
+    /* check for change of border element */
+    CheckElementChangeBySide(xx, yy, border_element, center_element,
+                            CE_TOUCHING_X, center_side);
+  }
+
+  for (i = 0; i < NUM_DIRECTIONS; i++)
+  {
+    int border_side = trigger_sides[i][1];
+    int border_element = border_element_old[i];
+
+    if (border_element == -1)
+      continue;
+
+    /* check for change of center element (but change it only once) */
+    if (!change_center_element)
+      change_center_element =
+       CheckElementChangeBySide(x, y, center_element, border_element,
+                                CE_TOUCHING_X, border_side);
+  }
+}
+
+#else
+
+void TestIfElementTouchesCustomElement_OLD(int x, int y)
 {
   static int xy[4][2] =
   {
@@ -8831,6 +12736,8 @@ void TestIfElementTouchesCustomElement(int x, int y)
   }
 }
 
+#endif
+
 void TestIfElementHitsCustomElement(int x, int y, int direction)
 {
   int dx = (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
@@ -8845,12 +12752,6 @@ void TestIfElementHitsCustomElement(int x, int y, int direction)
   touched_element = (IN_LEV_FIELD(hitx, hity) ?
                     MovingOrBlocked2Element(hitx, hity) : EL_STEELWALL);
 
-#if !USE_HITTING_SOMETHING_BUGFIX
-  /* "hitting something" is also true when hitting the playfield border */
-  CheckElementChangeBySide(x, y, hitting_element, touched_element,
-                          CE_HITTING_SOMETHING, direction);
-#endif
-
   if (IN_LEV_FIELD(hitx, hity))
   {
     int opposite_direction = MV_DIR_OPPOSITE(direction);
@@ -8864,29 +12765,20 @@ void TestIfElementHitsCustomElement(int x, int y, int direction)
 
     if (object_hit)
     {
-#if !USE_HIT_BY_SOMETHING_BUGFIX
-      CheckElementChangeBySide(hitx, hity, touched_element, hitting_element,
-                              CE_HIT_BY_SOMETHING, opposite_direction);
-#endif
-
       CheckElementChangeBySide(x, y, hitting_element, touched_element,
                               CE_HITTING_X, touched_side);
 
       CheckElementChangeBySide(hitx, hity, touched_element,
                               hitting_element, CE_HIT_BY_X, hitting_side);
 
-#if USE_HIT_BY_SOMETHING_BUGFIX
       CheckElementChangeBySide(hitx, hity, touched_element, hitting_element,
                               CE_HIT_BY_SOMETHING, opposite_direction);
-#endif
     }
   }
 
-#if USE_HITTING_SOMETHING_BUGFIX
   /* "hitting something" is also true when hitting the playfield border */
   CheckElementChangeBySide(x, y, hitting_element, touched_element,
                           CE_HITTING_SOMETHING, direction);
-#endif
 }
 
 #if 0
@@ -8955,6 +12847,7 @@ void TestIfElementSmashesCustomElement(int x, int y, int direction)
 void TestIfGoodThingHitsBadThing(int good_x, int good_y, int good_move_dir)
 {
   int i, kill_x = -1, kill_y = -1;
+
   int bad_element = -1;
   static int test_xy[4][2] =
   {
@@ -8982,7 +12875,7 @@ void TestIfGoodThingHitsBadThing(int good_x, int good_y, int good_move_dir)
       continue;
 
     test_move_dir =
-      (IS_MOVING(test_x, test_y) ? MovDir[test_x][test_y] : MV_NO_MOVING);
+      (IS_MOVING(test_x, test_y) ? MovDir[test_x][test_y] : MV_NONE);
 
     test_element = MovingOrBlocked2ElementIfNotLeaving(test_x, test_y);
 
@@ -9010,7 +12903,7 @@ void TestIfGoodThingHitsBadThing(int good_x, int good_y, int good_move_dir)
          !IS_INDESTRUCTIBLE(bad_element))
        Bang(kill_x, kill_y);
       else if (!PLAYER_ENEMY_PROTECTED(good_x, good_y))
-       KillHero(player);
+       KillPlayer(player);
     }
     else
       Bang(good_x, good_y);
@@ -9056,7 +12949,7 @@ void TestIfBadThingHitsGoodThing(int bad_x, int bad_y, int bad_move_dir)
       continue;
 
     test_move_dir =
-      (IS_MOVING(test_x, test_y) ? MovDir[test_x][test_y] : MV_NO_MOVING);
+      (IS_MOVING(test_x, test_y) ? MovDir[test_x][test_y] : MV_NONE);
 
     test_element = Feld[test_x][test_y];
 
@@ -9103,41 +12996,41 @@ void TestIfBadThingHitsGoodThing(int bad_x, int bad_y, int bad_move_dir)
          !IS_INDESTRUCTIBLE(bad_element))
        Bang(bad_x, bad_y);
       else if (!PLAYER_ENEMY_PROTECTED(kill_x, kill_y))
-       KillHero(player);
+       KillPlayer(player);
     }
     else
       Bang(kill_x, kill_y);
   }
 }
 
-void TestIfHeroTouchesBadThing(int x, int y)
+void TestIfPlayerTouchesBadThing(int x, int y)
 {
-  TestIfGoodThingHitsBadThing(x, y, MV_NO_MOVING);
+  TestIfGoodThingHitsBadThing(x, y, MV_NONE);
 }
 
-void TestIfHeroRunsIntoBadThing(int x, int y, int move_dir)
+void TestIfPlayerRunsIntoBadThing(int x, int y, int move_dir)
 {
   TestIfGoodThingHitsBadThing(x, y, move_dir);
 }
 
-void TestIfBadThingTouchesHero(int x, int y)
+void TestIfBadThingTouchesPlayer(int x, int y)
 {
-  TestIfBadThingHitsGoodThing(x, y, MV_NO_MOVING);
+  TestIfBadThingHitsGoodThing(x, y, MV_NONE);
 }
 
-void TestIfBadThingRunsIntoHero(int x, int y, int move_dir)
+void TestIfBadThingRunsIntoPlayer(int x, int y, int move_dir)
 {
   TestIfBadThingHitsGoodThing(x, y, move_dir);
 }
 
 void TestIfFriendTouchesBadThing(int x, int y)
 {
-  TestIfGoodThingHitsBadThing(x, y, MV_NO_MOVING);
+  TestIfGoodThingHitsBadThing(x, y, MV_NONE);
 }
 
 void TestIfBadThingTouchesFriend(int x, int y)
 {
-  TestIfBadThingHitsGoodThing(x, y, MV_NO_MOVING);
+  TestIfBadThingHitsGoodThing(x, y, MV_NONE);
 }
 
 void TestIfBadThingTouchesOtherBadThing(int bad_x, int bad_y)
@@ -9174,13 +13067,30 @@ void TestIfBadThingTouchesOtherBadThing(int bad_x, int bad_y)
     Bang(bad_x, bad_y);
 }
 
-void KillHero(struct PlayerInfo *player)
+void KillPlayer(struct PlayerInfo *player)
 {
   int jx = player->jx, jy = player->jy;
 
   if (!player->active)
     return;
 
+  /* the following code was introduced to prevent an infinite loop when calling
+     -> Bang()
+     -> CheckTriggeredElementChangeExt()
+     -> ExecuteCustomElementAction()
+     -> KillPlayer()
+     -> (infinitely repeating the above sequence of function calls)
+     which occurs when killing the player while having a CE with the setting
+     "kill player X when explosion of <player X>"; the solution using a new
+     field "player->killed" was chosen for backwards compatibility, although
+     clever use of the fields "player->active" etc. would probably also work */
+#if 1
+  if (player->killed)
+    return;
+#endif
+
+  player->killed = TRUE;
+
   /* remove accessible field at the player's position */
   Feld[jx][jy] = EL_EMPTY;
 
@@ -9189,36 +13099,36 @@ void KillHero(struct PlayerInfo *player)
   player->shield_deadly_time_left = 0;
 
   Bang(jx, jy);
-  BuryHero(player);
+  BuryPlayer(player);
 }
 
-static void KillHeroUnlessEnemyProtected(int x, int y)
+static void KillPlayerUnlessEnemyProtected(int x, int y)
 {
   if (!PLAYER_ENEMY_PROTECTED(x, y))
-    KillHero(PLAYERINFO(x, y));
+    KillPlayer(PLAYERINFO(x, y));
 }
 
-static void KillHeroUnlessExplosionProtected(int x, int y)
+static void KillPlayerUnlessExplosionProtected(int x, int y)
 {
   if (!PLAYER_EXPLOSION_PROTECTED(x, y))
-    KillHero(PLAYERINFO(x, y));
+    KillPlayer(PLAYERINFO(x, y));
 }
 
-void BuryHero(struct PlayerInfo *player)
+void BuryPlayer(struct PlayerInfo *player)
 {
   int jx = player->jx, jy = player->jy;
 
   if (!player->active)
     return;
 
-  PlayLevelSoundElementAction(jx, jy, player->element_nr, ACTION_DYING);
+  PlayLevelSoundElementAction(jx, jy, player->artwork_element, ACTION_DYING);
   PlayLevelSound(jx, jy, SND_GAME_LOSING);
 
   player->GameOver = TRUE;
-  RemoveHero(player);
+  RemovePlayer(player);
 }
 
-void RemoveHero(struct PlayerInfo *player)
+void RemovePlayer(struct PlayerInfo *player)
 {
   int jx = player->jx, jy = player->jy;
   int i, found = FALSE;
@@ -9229,6 +13139,9 @@ void RemoveHero(struct PlayerInfo *player)
   if (!ExplodeField[jx][jy])
     StorePlayer[jx][jy] = 0;
 
+  if (player->is_moving)
+    DrawLevelField(player->last_jx, player->last_jy);
+
   for (i = 0; i < MAX_PLAYERS; i++)
     if (stored_player[i].active)
       found = TRUE;
@@ -9240,6 +13153,27 @@ void RemoveHero(struct PlayerInfo *player)
   ExitY = ZY = jy;
 }
 
+#if USE_NEW_SNAP_DELAY
+static void setFieldForSnapping(int x, int y, int element, int direction)
+{
+  struct ElementInfo *ei = &element_info[element];
+  int direction_bit = MV_DIR_TO_BIT(direction);
+  int graphic_snapping = ei->direction_graphic[ACTION_SNAPPING][direction_bit];
+  int action = (graphic_snapping != IMG_EMPTY_SPACE ? ACTION_SNAPPING :
+               IS_DIGGABLE(element) ? ACTION_DIGGING : ACTION_COLLECTING);
+
+  Feld[x][y] = EL_ELEMENT_SNAPPING;
+  MovDelay[x][y] = MOVE_DELAY_NORMAL_SPEED + 1 - 1;
+
+  ResetGfxAnimation(x, y);
+
+  GfxElement[x][y] = element;
+  GfxAction[x][y] = action;
+  GfxDir[x][y] = direction;
+  GfxFrame[x][y] = -1;
+}
+#endif
+
 /*
   =============================================================================
   checkDiagonalPushing()
@@ -9283,17 +13217,24 @@ int DigField(struct PlayerInfo *player,
 {
   boolean is_player = (IS_PLAYER(oldx, oldy) || mode != DF_DIG);
   boolean player_was_pushing = player->is_pushing;
+  boolean player_can_move = (!player->cannot_move && mode != DF_SNAP);
+  boolean player_can_move_or_snap = (!player->cannot_move || mode == DF_SNAP);
   int jx = oldx, jy = oldy;
   int dx = x - jx, dy = y - jy;
   int nextx = x + dx, nexty = y + dy;
-  int move_direction = (dx == -1 ? MV_LEFT :
+  int move_direction = (dx == -1 ? MV_LEFT  :
                        dx == +1 ? MV_RIGHT :
-                       dy == -1 ? MV_UP :
-                       dy == +1 ? MV_DOWN : MV_NO_MOVING);
+                       dy == -1 ? MV_UP    :
+                       dy == +1 ? MV_DOWN  : MV_NONE);
   int opposite_direction = MV_DIR_OPPOSITE(move_direction);
   int dig_side = MV_DIR_OPPOSITE(move_direction);
   int old_element = Feld[jx][jy];
+#if USE_FIXED_DONT_RUN_INTO
+  int element = MovingOrBlocked2ElementIfNotLeaving(x, y);
+#else
   int element;
+#endif
+  int collect_count;
 
   if (is_player)               /* function can also be called by EL_PENGUIN */
   {
@@ -9309,50 +13250,103 @@ int DigField(struct PlayerInfo *player,
     if (mode == DF_NO_PUSH)    /* player just stopped pushing */
     {
       player->is_switching = FALSE;
-#if USE_NEW_PUSH_DELAY
       player->push_delay = -1;
-#else
-      player->push_delay = 0;
-#endif
 
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
     }
   }
 
+#if !USE_FIXED_DONT_RUN_INTO
   if (IS_MOVING(x, y) || IS_PLAYER(x, y))
-    return MF_NO_ACTION;
+    return MP_NO_ACTION;
+#endif
 
   if (IS_TUBE(Back[jx][jy]) && game.engine_version >= VERSION_IDENT(2,2,0,0))
     old_element = Back[jx][jy];
 
-#if USE_BACK_WALKABLE_BUGFIX
   /* in case of element dropped at player position, check background */
   else if (Back[jx][jy] != EL_EMPTY &&
           game.engine_version >= VERSION_IDENT(2,2,0,0))
     old_element = Back[jx][jy];
-#endif
 
   if (IS_WALKABLE(old_element) && !ACCESS_FROM(old_element, move_direction))
-    return MF_NO_ACTION;       /* field has no opening in this direction */
+    return MP_NO_ACTION;       /* field has no opening in this direction */
 
   if (IS_PASSABLE(old_element) && !ACCESS_FROM(old_element,opposite_direction))
-    return MF_NO_ACTION;       /* field has no opening in this direction */
+    return MP_NO_ACTION;       /* field has no opening in this direction */
+
+#if USE_FIXED_DONT_RUN_INTO
+  if (player_can_move && element == EL_ACID && move_direction == MV_DOWN)
+  {
+    SplashAcid(x, y);
+
+    Feld[jx][jy] = player->artwork_element;
+    InitMovingField(jx, jy, MV_DOWN);
+    Store[jx][jy] = EL_ACID;
+    ContinueMoving(jx, jy);
+    BuryPlayer(player);
+
+    return MP_DONT_RUN_INTO;
+  }
+#endif
+
+#if USE_FIXED_DONT_RUN_INTO
+  if (player_can_move && DONT_RUN_INTO(element))
+  {
+    TestIfPlayerRunsIntoBadThing(jx, jy, player->MovDir);
+
+    return MP_DONT_RUN_INTO;
+  }
+#endif
+
+#if USE_FIXED_DONT_RUN_INTO
+  if (IS_MOVING(x, y) || IS_PLAYER(x, y))
+    return MP_NO_ACTION;
+#endif
 
+#if !USE_FIXED_DONT_RUN_INTO
   element = Feld[x][y];
+#endif
+
+  collect_count = element_info[element].collect_count_initial;
 
   if (!is_player && !IS_COLLECTIBLE(element))  /* penguin cannot collect it */
-    return MF_NO_ACTION;
+    return MP_NO_ACTION;
+
+  if (game.engine_version < VERSION_IDENT(2,2,0,0))
+    player_can_move = player_can_move_or_snap;
 
   if (mode == DF_SNAP && !IS_SNAPPABLE(element) &&
       game.engine_version >= VERSION_IDENT(2,2,0,0))
-    return MF_NO_ACTION;
+  {
+    CheckElementChangeByPlayer(x, y, element, CE_SNAPPED_BY_PLAYER,
+                              player->index_bit, dig_side);
+    CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_SNAPS_X,
+                                       player->index_bit, dig_side);
 
+    if (element == EL_DC_LANDMINE)
+      Bang(x, y);
+
+    if (Feld[x][y] != element)         /* field changed by snapping */
+      return MP_ACTION;
+
+    return MP_NO_ACTION;
+  }
+
+#if USE_PLAYER_GRAVITY
+  if (player->gravity && is_player && !player->is_auto_moving &&
+      canFallDown(player) && move_direction != MV_DOWN &&
+      !canMoveToValidFieldWithGravity(jx, jy, move_direction))
+    return MP_NO_ACTION;       /* player cannot walk here due to gravity */
+#else
   if (game.gravity && is_player && !player->is_auto_moving &&
       canFallDown(player) && move_direction != MV_DOWN &&
       !canMoveToValidFieldWithGravity(jx, jy, move_direction))
-    return MF_NO_ACTION;       /* player cannot walk here due to gravity */
+    return MP_NO_ACTION;       /* player cannot walk here due to gravity */
+#endif
 
-  if (IS_WALKABLE(element) && ACCESS_FROM(element, opposite_direction))
+  if (player_can_move &&
+      IS_WALKABLE(element) && ACCESS_FROM(element, opposite_direction))
   {
     int sound_element = SND_ELEMENT(element);
     int sound_action = ACTION_WALKING;
@@ -9360,14 +13354,22 @@ int DigField(struct PlayerInfo *player,
     if (IS_RND_GATE(element))
     {
       if (!player->key[RND_GATE_NR(element)])
-       return MF_NO_ACTION;
+       return MP_NO_ACTION;
     }
     else if (IS_RND_GATE_GRAY(element))
     {
       if (!player->key[RND_GATE_GRAY_NR(element)])
-       return MF_NO_ACTION;
+       return MP_NO_ACTION;
+    }
+    else if (IS_RND_GATE_GRAY_ACTIVE(element))
+    {
+      if (!player->key[RND_GATE_GRAY_ACTIVE_NR(element)])
+       return MP_NO_ACTION;
     }
     else if (element == EL_EXIT_OPEN ||
+            element == EL_EM_EXIT_OPEN ||
+            element == EL_STEEL_EXIT_OPEN ||
+            element == EL_EM_STEEL_EXIT_OPEN ||
             element == EL_SP_EXIT_OPEN ||
             element == EL_SP_EXIT_OPENING)
     {
@@ -9382,25 +13384,55 @@ int DigField(struct PlayerInfo *player,
     if (element_info[sound_element].sound[sound_action] != SND_UNDEFINED)
       PlayLevelSoundElementAction(x, y, sound_element, sound_action);
     else
-      PlayLevelSoundElementAction(x, y, player->element_nr, sound_action);
+      PlayLevelSoundElementAction(x, y, player->artwork_element, sound_action);
   }
-  else if (IS_PASSABLE(element) && canPassField(x, y, move_direction))
+  else if (player_can_move &&
+          IS_PASSABLE(element) && canPassField(x, y, move_direction))
   {
     if (!ACCESS_FROM(element, opposite_direction))
-      return MF_NO_ACTION;     /* field not accessible from this direction */
+      return MP_NO_ACTION;     /* field not accessible from this direction */
 
     if (CAN_MOVE(element))     /* only fixed elements can be passed! */
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
     if (IS_EM_GATE(element))
     {
       if (!player->key[EM_GATE_NR(element)])
-       return MF_NO_ACTION;
+       return MP_NO_ACTION;
     }
     else if (IS_EM_GATE_GRAY(element))
     {
       if (!player->key[EM_GATE_GRAY_NR(element)])
-       return MF_NO_ACTION;
+       return MP_NO_ACTION;
+    }
+    else if (IS_EM_GATE_GRAY_ACTIVE(element))
+    {
+      if (!player->key[EM_GATE_GRAY_ACTIVE_NR(element)])
+       return MP_NO_ACTION;
+    }
+    else if (IS_EMC_GATE(element))
+    {
+      if (!player->key[EMC_GATE_NR(element)])
+       return MP_NO_ACTION;
+    }
+    else if (IS_EMC_GATE_GRAY(element))
+    {
+      if (!player->key[EMC_GATE_GRAY_NR(element)])
+       return MP_NO_ACTION;
+    }
+    else if (IS_EMC_GATE_GRAY_ACTIVE(element))
+    {
+      if (!player->key[EMC_GATE_GRAY_ACTIVE_NR(element)])
+       return MP_NO_ACTION;
+    }
+    else if (element == EL_DC_GATE_WHITE ||
+            element == EL_DC_GATE_WHITE_GRAY ||
+            element == EL_DC_GATE_WHITE_GRAY_ACTIVE)
+    {
+      if (player->num_white_keys == 0)
+       return MP_NO_ACTION;
+
+      player->num_white_keys--;
     }
     else if (IS_SP_PORT(element))
     {
@@ -9408,17 +13440,29 @@ int DigField(struct PlayerInfo *player,
          element == EL_SP_GRAVITY_PORT_RIGHT ||
          element == EL_SP_GRAVITY_PORT_UP ||
          element == EL_SP_GRAVITY_PORT_DOWN)
+#if USE_PLAYER_GRAVITY
+       player->gravity = !player->gravity;
+#else
        game.gravity = !game.gravity;
+#endif
       else if (element == EL_SP_GRAVITY_ON_PORT_LEFT ||
               element == EL_SP_GRAVITY_ON_PORT_RIGHT ||
               element == EL_SP_GRAVITY_ON_PORT_UP ||
               element == EL_SP_GRAVITY_ON_PORT_DOWN)
+#if USE_PLAYER_GRAVITY
+       player->gravity = TRUE;
+#else
        game.gravity = TRUE;
+#endif
       else if (element == EL_SP_GRAVITY_OFF_PORT_LEFT ||
               element == EL_SP_GRAVITY_OFF_PORT_RIGHT ||
               element == EL_SP_GRAVITY_OFF_PORT_UP ||
               element == EL_SP_GRAVITY_OFF_PORT_DOWN)
+#if USE_PLAYER_GRAVITY
+       player->gravity = FALSE;
+#else
        game.gravity = FALSE;
+#endif
     }
 
     /* automatically move to the next field with double speed */
@@ -9433,7 +13477,7 @@ int DigField(struct PlayerInfo *player,
 
     PlayLevelSoundAction(x, y, ACTION_PASSING);
   }
-  else if (IS_DIGGABLE(element))
+  else if (player_can_move_or_snap && IS_DIGGABLE(element))
   {
     RemoveField(x, y);
 
@@ -9449,9 +13493,21 @@ int DigField(struct PlayerInfo *player,
                                        player->index_bit, dig_side);
 
     if (mode == DF_SNAP)
-      TestIfElementTouchesCustomElement(x, y); /* for empty space */
+    {
+#if USE_NEW_SNAP_DELAY
+      if (level.block_snap_field)
+       setFieldForSnapping(x, y, element, move_direction);
+      else
+       TestIfElementTouchesCustomElement(x, y);        /* for empty space */
+#else
+      TestIfElementTouchesCustomElement(x, y);         /* for empty space */
+#endif
+
+      CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_SNAPS_X,
+                                         player->index_bit, dig_side);
+    }
   }
-  else if (IS_COLLECTIBLE(element))
+  else if (player_can_move_or_snap && IS_COLLECTIBLE(element))
   {
     RemoveField(x, y);
 
@@ -9467,21 +13523,30 @@ int DigField(struct PlayerInfo *player,
     }
     else if (element == EL_EXTRA_TIME && level.time > 0)
     {
-      TimeLeft += 10;
+      TimeLeft += level.extra_time;
+
+#if 1
+      game_control_value[GAME_CONTROL_TIME] = TimeLeft;
+
+      DisplayGameControlValues();
+#else
       DrawGameValue_Time(TimeLeft);
+#endif
     }
     else if (element == EL_SHIELD_NORMAL || element == EL_SHIELD_DEADLY)
     {
-      player->shield_normal_time_left += 10;
+      player->shield_normal_time_left += level.shield_normal_time;
       if (element == EL_SHIELD_DEADLY)
-       player->shield_deadly_time_left += 10;
+       player->shield_deadly_time_left += level.shield_deadly_time;
     }
-    else if (element == EL_DYNAMITE || element == EL_SP_DISK_RED)
+    else if (element == EL_DYNAMITE ||
+            element == EL_EM_DYNAMITE ||
+            element == EL_SP_DISK_RED)
     {
       if (player->inventory_size < MAX_INVENTORY_SIZE)
        player->inventory_element[player->inventory_size++] = element;
 
-      DrawGameValue_Dynamite(local_player->inventory_size);
+      DrawGameDoorValues();
     }
     else if (element == EL_DYNABOMB_INCREASE_NUMBER)
     {
@@ -9500,60 +13565,93 @@ int DigField(struct PlayerInfo *player,
     {
       player->key[KEY_NR(element)] = TRUE;
 
-      DrawGameValue_Keys(player->key);
+      DrawGameDoorValues();
+    }
+    else if (element == EL_DC_KEY_WHITE)
+    {
+      player->num_white_keys++;
 
-      redraw_mask |= REDRAW_DOOR_1;
+      /* display white keys? */
+      /* DrawGameDoorValues(); */
     }
     else if (IS_ENVELOPE(element))
     {
       player->show_envelope = element;
     }
+    else if (element == EL_EMC_LENSES)
+    {
+      game.lenses_time_left = level.lenses_time * FRAMES_PER_SECOND;
+
+      RedrawAllInvisibleElementsForLenses();
+    }
+    else if (element == EL_EMC_MAGNIFIER)
+    {
+      game.magnify_time_left = level.magnify_time * FRAMES_PER_SECOND;
+
+      RedrawAllInvisibleElementsForMagnifier();
+    }
     else if (IS_DROPPABLE(element) ||
             IS_THROWABLE(element))     /* can be collected and dropped */
     {
       int i;
 
-      if (element_info[element].collect_count == 0)
+      if (collect_count == 0)
        player->inventory_infinite_element = element;
       else
-       for (i = 0; i < element_info[element].collect_count; i++)
+       for (i = 0; i < collect_count; i++)
          if (player->inventory_size < MAX_INVENTORY_SIZE)
            player->inventory_element[player->inventory_size++] = element;
 
-      DrawGameValue_Dynamite(local_player->inventory_size);
+      DrawGameDoorValues();
     }
-    else if (element_info[element].collect_count > 0)
+    else if (collect_count > 0)
     {
-      local_player->gems_still_needed -=
-       element_info[element].collect_count;
+      local_player->gems_still_needed -= collect_count;
       if (local_player->gems_still_needed < 0)
        local_player->gems_still_needed = 0;
 
+#if 1
+      game_control_value[GAME_CONTROL_GEMS] = local_player->gems_still_needed;
+
+      DisplayGameControlValues();
+#else
       DrawGameValue_Emeralds(local_player->gems_still_needed);
+#endif
     }
 
     RaiseScoreElement(element);
     PlayLevelSoundElementAction(x, y, element, ACTION_COLLECTING);
 
     if (is_player)
-      CheckTriggeredElementChangeByPlayer(x, y, element,
-                                         CE_PLAYER_COLLECTS_X,
+      CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_COLLECTS_X,
                                          player->index_bit, dig_side);
 
     if (mode == DF_SNAP)
-      TestIfElementTouchesCustomElement(x, y); /* for empty space */
+    {
+#if USE_NEW_SNAP_DELAY
+      if (level.block_snap_field)
+       setFieldForSnapping(x, y, element, move_direction);
+      else
+       TestIfElementTouchesCustomElement(x, y);        /* for empty space */
+#else
+      TestIfElementTouchesCustomElement(x, y);         /* for empty space */
+#endif
+
+      CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_SNAPS_X,
+                                         player->index_bit, dig_side);
+    }
   }
-  else if (IS_PUSHABLE(element))
+  else if (player_can_move_or_snap && IS_PUSHABLE(element))
   {
     if (mode == DF_SNAP && element != EL_BD_ROCK)
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
     if (CAN_FALL(element) && dy)
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
     if (CAN_FALL(element) && IN_LEV_FIELD(x, y + 1) && IS_FREE(x, y + 1) &&
        !(element == EL_SPRING && level.use_spring_bug))
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
     if (CAN_MOVE(element) && GET_MAX_MOVE_DELAY(element) == 0 &&
        ((move_direction & MV_VERTICAL &&
@@ -9566,12 +13664,12 @@ int DigField(struct PlayerInfo *player,
            IN_LEV_FIELD(x, y - 1) && IS_FREE(x, y - 1)) ||
           (element_info[element].move_pattern & MV_DOWN &&
            IN_LEV_FIELD(x, y + 1) && IS_FREE(x, y + 1))))))
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
     /* do not push elements already moving away faster than player */
     if (CAN_MOVE(element) && MovDir[x][y] == move_direction &&
        ABS(getElementMoveStepsize(x, y)) > MOVE_STEPSIZE_NORMAL)
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
     if (game.engine_version >= VERSION_IDENT(3,1,0,0))
     {
@@ -9590,44 +13688,29 @@ int DigField(struct PlayerInfo *player,
     }
 
     player->is_pushing = TRUE;
+    player->is_active = TRUE;
 
     if (!(IN_LEV_FIELD(nextx, nexty) &&
          (IS_FREE(nextx, nexty) ||
           (Feld[nextx][nexty] == EL_SOKOBAN_FIELD_EMPTY &&
            IS_SB_ELEMENT(element)))))
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
     if (!checkDiagonalPushing(player, x, y, real_dx, real_dy))
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
 
-#if USE_NEW_PUSH_DELAY
     if (player->push_delay == -1)      /* new pushing; restart delay */
       player->push_delay = 0;
-#else
-    if (player->push_delay == 0)       /* new pushing; restart delay */
-      player->push_delay = FrameCounter;
-#endif
 
-#if USE_NEW_PUSH_DELAY
     if (player->push_delay < player->push_delay_value &&
        !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
        element != EL_SPRING && element != EL_BALLOON)
-#else
-    if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-       !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
-       element != EL_SPRING && element != EL_BALLOON)
-#endif
     {
       /* make sure that there is no move delay before next try to push */
-#if USE_NEW_MOVE_DELAY
       if (game.engine_version >= VERSION_IDENT(3,0,7,1))
        player->move_delay = 0;
-#else
-      if (game.engine_version >= VERSION_IDENT(3,0,7,1))
-       player->move_delay = INITIAL_MOVE_DELAY_OFF;
-#endif
 
-      return MF_NO_ACTION;
+      return MP_NO_ACTION;
     }
 
     if (IS_SB_ELEMENT(element))
@@ -9658,7 +13741,8 @@ int DigField(struct PlayerInfo *player,
       if (local_player->sokobanfields_still_needed == 0 &&
          game.emulation == EMU_SOKOBAN)
       {
-       player->LevelSolved = player->GameOver = TRUE;
+       PlayerWins(player);
+
        PlayLevelSound(x, y, SND_GAME_SOKOBAN_SOLVING);
       }
     }
@@ -9681,29 +13765,23 @@ int DigField(struct PlayerInfo *player,
     else
       player->push_delay_value = -1;   /* get new value later */
 
-#if USE_PUSH_BUGFIX
-    /* now: check for element change _after_ element has been pushed! */
+    /* check for element change _after_ element has been pushed */
     if (game.use_change_when_pushing_bug)
     {
       CheckElementChangeByPlayer(x, y, element, CE_PUSHED_BY_PLAYER,
                                 player->index_bit, dig_side);
-      CheckTriggeredElementChangeByPlayer(x,y, element, CE_PLAYER_PUSHES_X,
+      CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_PUSHES_X,
                                          player->index_bit, dig_side);
     }
-
-#else
-    /* check for element change _after_ element has been pushed! */
-#endif
   }
   else if (IS_SWITCHABLE(element))
   {
     if (PLAYER_SWITCHING(player, x, y))
     {
-      CheckTriggeredElementChangeByPlayer(x,y, element,
-                                         CE_PLAYER_PRESSES_X,
+      CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_PRESSES_X,
                                          player->index_bit, dig_side);
 
-      return MF_ACTION;
+      return MP_ACTION;
     }
 
     player->is_switching = TRUE;
@@ -9724,7 +13802,7 @@ int DigField(struct PlayerInfo *player,
     {
       int xx, yy;
 
-      for (yy = 0; yy < lev_fieldy; yy++) for (xx=0; xx < lev_fieldx; xx++)
+      SCAN_PLAYFIELD(xx, yy)
       {
        if (Feld[xx][yy] == EL_SP_DISK_YELLOW)
          Bang(xx, yy);
@@ -9737,7 +13815,9 @@ int DigField(struct PlayerInfo *player,
       ToggleBeltSwitch(x, y);
     }
     else if (element == EL_SWITCHGATE_SWITCH_UP ||
-            element == EL_SWITCHGATE_SWITCH_DOWN)
+            element == EL_SWITCHGATE_SWITCH_DOWN ||
+            element == EL_DC_SWITCHGATE_SWITCH_UP ||
+            element == EL_DC_SWITCHGATE_SWITCH_DOWN)
     {
       ToggleSwitchgateSwitch(x, y);
     }
@@ -9746,24 +13826,24 @@ int DigField(struct PlayerInfo *player,
     {
       ToggleLightSwitch(x, y);
     }
-    else if (element == EL_TIMEGATE_SWITCH)
+    else if (element == EL_TIMEGATE_SWITCH ||
+            element == EL_DC_TIMEGATE_SWITCH)
     {
       ActivateTimegateSwitch(x, y);
     }
-    else if (element == EL_BALLOON_SWITCH_LEFT ||
+    else if (element == EL_BALLOON_SWITCH_LEFT  ||
             element == EL_BALLOON_SWITCH_RIGHT ||
-            element == EL_BALLOON_SWITCH_UP ||
-            element == EL_BALLOON_SWITCH_DOWN ||
+            element == EL_BALLOON_SWITCH_UP    ||
+            element == EL_BALLOON_SWITCH_DOWN  ||
+            element == EL_BALLOON_SWITCH_NONE  ||
             element == EL_BALLOON_SWITCH_ANY)
     {
-      if (element == EL_BALLOON_SWITCH_ANY)
-       game.balloon_dir = move_direction;
-      else
-       game.balloon_dir = (element == EL_BALLOON_SWITCH_LEFT  ? MV_LEFT :
-                           element == EL_BALLOON_SWITCH_RIGHT ? MV_RIGHT :
-                           element == EL_BALLOON_SWITCH_UP    ? MV_UP :
-                           element == EL_BALLOON_SWITCH_DOWN  ? MV_DOWN :
-                           MV_NO_MOVING);
+      game.wind_direction = (element == EL_BALLOON_SWITCH_LEFT  ? MV_LEFT  :
+                            element == EL_BALLOON_SWITCH_RIGHT ? MV_RIGHT :
+                            element == EL_BALLOON_SWITCH_UP    ? MV_UP    :
+                            element == EL_BALLOON_SWITCH_DOWN  ? MV_DOWN  :
+                            element == EL_BALLOON_SWITCH_NONE  ? MV_NONE  :
+                            move_direction);
     }
     else if (element == EL_LAMP)
     {
@@ -9776,21 +13856,61 @@ int DigField(struct PlayerInfo *player,
     else if (element == EL_TIME_ORB_FULL)
     {
       Feld[x][y] = EL_TIME_ORB_EMPTY;
-      TimeLeft += 10;
-      DrawGameValue_Time(TimeLeft);
+
+      if (level.time > 0 || level.use_time_orb_bug)
+      {
+       TimeLeft += level.time_orb_time;
+
+#if 1
+       game_control_value[GAME_CONTROL_TIME] = TimeLeft;
+
+       DisplayGameControlValues();
+#else
+       DrawGameValue_Time(TimeLeft);
+#endif
+      }
 
       ResetGfxAnimation(x, y);
       DrawLevelField(x, y);
     }
+    else if (element == EL_EMC_MAGIC_BALL_SWITCH ||
+            element == EL_EMC_MAGIC_BALL_SWITCH_ACTIVE)
+    {
+      int xx, yy;
+
+      game.ball_state = !game.ball_state;
+
+      SCAN_PLAYFIELD(xx, yy)
+      {
+       int e = Feld[xx][yy];
+
+       if (game.ball_state)
+       {
+         if (e == EL_EMC_MAGIC_BALL)
+           CreateField(xx, yy, EL_EMC_MAGIC_BALL_ACTIVE);
+         else if (e == EL_EMC_MAGIC_BALL_SWITCH)
+           CreateField(xx, yy, EL_EMC_MAGIC_BALL_SWITCH_ACTIVE);
+       }
+       else
+       {
+         if (e == EL_EMC_MAGIC_BALL_ACTIVE)
+           CreateField(xx, yy, EL_EMC_MAGIC_BALL);
+         else if (e == EL_EMC_MAGIC_BALL_SWITCH_ACTIVE)
+           CreateField(xx, yy, EL_EMC_MAGIC_BALL_SWITCH);
+       }
+      }
+    }
 
-    CheckTriggeredElementChangeByPlayer(x, y, element,
-                                       CE_SWITCH_OF_X,
+    CheckTriggeredElementChangeByPlayer(x, y, element, CE_SWITCH_OF_X,
+                                       player->index_bit, dig_side);
+
+    CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_SWITCHES_X,
                                        player->index_bit, dig_side);
 
     CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_PRESSES_X,
                                        player->index_bit, dig_side);
 
-    return MF_ACTION;
+    return MP_ACTION;
   }
   else
   {
@@ -9802,8 +13922,12 @@ int DigField(struct PlayerInfo *player,
 
       CheckElementChangeByPlayer(x, y, element, CE_SWITCHED,
                                 player->index_bit, dig_side);
-      CheckTriggeredElementChangeByPlayer(x, y, element,
-                                         CE_SWITCH_OF_X,
+      CheckTriggeredElementChangeByPlayer(x, y, element, CE_SWITCH_OF_X,
+                                         player->index_bit, dig_side);
+
+      CheckElementChangeByPlayer(x, y, element, CE_SWITCHED_BY_PLAYER,
+                                player->index_bit, dig_side);
+      CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_SWITCHES_X,
                                          player->index_bit, dig_side);
     }
 
@@ -9812,34 +13936,33 @@ int DigField(struct PlayerInfo *player,
     CheckTriggeredElementChangeByPlayer(x, y, element, CE_PLAYER_PRESSES_X,
                                        player->index_bit, dig_side);
 
-    return MF_NO_ACTION;
+    return MP_NO_ACTION;
   }
 
-#if USE_NEW_PUSH_DELAY
   player->push_delay = -1;
-#else
-  player->push_delay = 0;
-#endif
 
-#if USE_PENGUIN_COLLECT_BUGFIX
   if (is_player)               /* function can also be called by EL_PENGUIN */
-#endif
   {
     if (Feld[x][y] != element)         /* really digged/collected something */
+    {
       player->is_collecting = !player->is_digging;
+      player->is_active = TRUE;
+    }
   }
 
-  return MF_MOVING;
+  return MP_MOVING;
 }
 
 boolean SnapField(struct PlayerInfo *player, int dx, int dy)
 {
   int jx = player->jx, jy = player->jy;
   int x = jx + dx, y = jy + dy;
-  int snap_direction = (dx == -1 ? MV_LEFT :
+  int snap_direction = (dx == -1 ? MV_LEFT  :
                        dx == +1 ? MV_RIGHT :
-                       dy == -1 ? MV_UP :
-                       dy == +1 ? MV_DOWN : MV_NO_MOVING);
+                       dy == -1 ? MV_UP    :
+                       dy == +1 ? MV_DOWN  : MV_NONE);
+  boolean can_continue_snapping = (level.continuous_snapping &&
+                                  WasJustFalling[x][y] < CHECK_DELAY_FALLING);
 
   if (player->MovPos != 0 && game.engine_version >= VERSION_IDENT(2,2,0,0))
     return FALSE;
@@ -9867,8 +13990,14 @@ boolean SnapField(struct PlayerInfo *player, int dx, int dy)
     return FALSE;
   }
 
+#if USE_NEW_CONTINUOUS_SNAPPING
+  /* prevent snapping with already pressed snap key when not allowed */
+  if (player->is_snapping && !can_continue_snapping)
+    return FALSE;
+#else
   if (player->is_snapping)
     return FALSE;
+#endif
 
   player->MovDir = snap_direction;
 
@@ -9880,11 +14009,14 @@ boolean SnapField(struct PlayerInfo *player, int dx, int dy)
   }
 
   player->is_dropping = FALSE;
+  player->is_dropping_pressed = FALSE;
+  player->drop_pressed_delay = 0;
 
-  if (DigField(player, jx, jy, x, y, 0, 0, DF_SNAP) == MF_NO_ACTION)
+  if (DigField(player, jx, jy, x, y, 0, 0, DF_SNAP) == MP_NO_ACTION)
     return FALSE;
 
   player->is_snapping = TRUE;
+  player->is_active = TRUE;
 
   if (player->MovPos == 0)
   {
@@ -9915,14 +14047,14 @@ boolean DropElement(struct PlayerInfo *player)
                      EL_DYNABOMB_PLAYER_1_ACTIVE + player->index_nr :
                      EL_UNDEFINED);
 
-#if USE_DROP_BUGFIX
+  player->is_dropping_pressed = TRUE;
+
   /* do not drop an element on top of another element; when holding drop key
      pressed without moving, dropped element must move away before the next
      element can be dropped (this is especially important if the next element
      is dynamite, which can be placed on background for historical reasons) */
   if (PLAYER_DROPPING(player, dropx, dropy) && Feld[dropx][dropy] != EL_EMPTY)
-    return MF_ACTION;
-#endif
+    return MP_ACTION;
 
   if (IS_THROWABLE(drop_element))
   {
@@ -9944,6 +14076,10 @@ boolean DropElement(struct PlayerInfo *player)
   if (new_element == EL_UNDEFINED)
     return FALSE;
 
+  /* check if drop key was pressed long enough for EM style dynamite */
+  if (new_element == EL_EM_DYNAMITE && player->drop_pressed_delay < 40)
+    return FALSE;
+
   /* check if anything can be dropped at the current position */
   if (IS_ACTIVE_BOMB(old_element) || old_element == EL_EXPLOSION)
     return FALSE;
@@ -9965,10 +14101,12 @@ boolean DropElement(struct PlayerInfo *player)
     {
       player->inventory_size--;
 
-      DrawGameValue_Dynamite(local_player->inventory_size);
+      DrawGameDoorValues();
 
       if (new_element == EL_DYNAMITE)
        new_element = EL_DYNAMITE_ACTIVE;
+      else if (new_element == EL_EM_DYNAMITE)
+       new_element = EL_EM_DYNAMITE_ACTIVE;
       else if (new_element == EL_SP_DISK_RED)
        new_element = EL_SP_DISK_RED_ACTIVE;
     }
@@ -9982,7 +14120,7 @@ boolean DropElement(struct PlayerInfo *player)
     PlayLevelSoundAction(dropx, dropy, ACTION_DROPPING);
 
     /* needed if previous element just changed to "empty" in the last frame */
-    Changed[dropx][dropy] = FALSE;             /* allow another change */
+    ChangeCount[dropx][dropy] = 0;     /* allow at least one more change */
 
     CheckElementChangeByPlayer(dropx, dropy, new_element, CE_DROPPED_BY_PLAYER,
                               player->index_bit, drop_side);
@@ -10022,17 +14160,24 @@ boolean DropElement(struct PlayerInfo *player)
     nextx = dropx + GET_DX_FROM_DIR(move_direction);
     nexty = dropy + GET_DY_FROM_DIR(move_direction);
 
-    Changed[dropx][dropy] = FALSE;             /* allow another change */
-    CheckCollision[dropx][dropy] = 2;
+    ChangeCount[dropx][dropy] = 0;     /* allow at least one more change */
+
+#if USE_FIX_IMPACT_COLLISION
+    /* do not cause impact style collision by dropping elements that can fall */
+    CheckCollision[dropx][dropy] = CHECK_DELAY_COLLISION;
+#else
+    CheckCollision[dropx][dropy] = CHECK_DELAY_COLLISION;
+#endif
   }
 
   player->drop_delay = GET_NEW_DROP_DELAY(drop_element);
   player->is_dropping = TRUE;
 
-#if USE_DROP_BUGFIX
+  player->drop_pressed_delay = 0;
+  player->is_dropping_pressed = FALSE;
+
   player->drop_x = dropx;
   player->drop_y = dropy;
-#endif
 
   return TRUE;
 }
@@ -10155,9 +14300,12 @@ static void PlayLevelMusic()
     PlayMusic(MAP_NOCONF_MUSIC(level_nr));     /* from music dir */
 }
 
-void PlayLevelSound_EM(int x, int y, int element_em, int sample)
+void PlayLevelSound_EM(int xx, int yy, int element_em, int sample)
 {
   int element = (element_em > -1 ? map_element_EM_to_RND(element_em) : 0);
+  int offset = (BorderElement == EL_STEELWALL ? 1 : 0);
+  int x = xx - 1 - offset;
+  int y = yy - 1 - offset;
 
   switch (sample)
   {
@@ -10202,7 +14350,7 @@ void PlayLevelSound_EM(int x, int y, int element_em, int sample)
       break;
 
     case SAMPLE_slurp:
-      PlayLevelSoundElementAction(x, y, element, ACTION_SLURPED_BY_SPRING);
+      PlayLevelSoundElementAction(x, y, element, ACTION_EATING);
       break;
 
     case SAMPLE_eater:
@@ -10303,7 +14451,7 @@ void PlayLevelSound_EM(int x, int y, int element_em, int sample)
       break;
 
     case SAMPLE_time:
-      PlaySoundStereo(SND_GAME_RUNNING_OUT_OF_TIME, SOUND_MIDDLE);
+      PlaySound(SND_GAME_RUNNING_OUT_OF_TIME);
       break;
 
     default:
@@ -10312,16 +14460,47 @@ void PlayLevelSound_EM(int x, int y, int element_em, int sample)
   }
 }
 
+#if 0
+void ChangeTime(int value)
+{
+  int *time = (level.time == 0 ? &TimePlayed : &TimeLeft);
+
+  *time += value;
+
+  /* EMC game engine uses value from time counter of RND game engine */
+  level.native_em_level->lev->time = *time;
+
+  DrawGameValue_Time(*time);
+}
+
+void RaiseScore(int value)
+{
+  /* EMC game engine and RND game engine have separate score counters */
+  int *score = (level.game_engine_type == GAME_ENGINE_TYPE_EM ?
+               &level.native_em_level->lev->score : &local_player->score);
+
+  *score += value;
+
+  DrawGameValue_Score(*score);
+}
+#endif
+
 void RaiseScore(int value)
 {
   local_player->score += value;
 
+#if 1
+  game_control_value[GAME_CONTROL_SCORE] = local_player->score;
+
+  DisplayGameControlValues();
+#else
   DrawGameValue_Score(local_player->score);
+#endif
 }
 
 void RaiseScoreElement(int element)
 {
-  switch(element)
+  switch (element)
   {
     case EL_EMERALD:
     case EL_BD_DIAMOND:
@@ -10364,6 +14543,7 @@ void RaiseScoreElement(int element)
       RaiseScore(level.score[SC_NUT]);
       break;
     case EL_DYNAMITE:
+    case EL_EM_DYNAMITE:
     case EL_SP_DISK_RED:
     case EL_DYNABOMB_INCREASE_NUMBER:
     case EL_DYNABOMB_INCREASE_SIZE:
@@ -10375,7 +14555,7 @@ void RaiseScoreElement(int element)
       RaiseScore(level.score[SC_SHIELD]);
       break;
     case EL_EXTRA_TIME:
-      RaiseScore(level.score[SC_TIME_BONUS]);
+      RaiseScore(level.extra_time_score);
       break;
     case EL_KEY_1:
     case EL_KEY_2:
@@ -10389,6 +14569,7 @@ void RaiseScoreElement(int element)
     case EL_EMC_KEY_6:
     case EL_EMC_KEY_7:
     case EL_EMC_KEY_8:
+    case EL_DC_KEY_WHITE:
       RaiseScore(level.score[SC_KEY]);
       break;
     default:
@@ -10397,25 +14578,51 @@ void RaiseScoreElement(int element)
   }
 }
 
-void RequestQuitGame(boolean ask_if_really_quit)
+void RequestQuitGameExt(boolean skip_request, boolean quick_quit, char *message)
 {
-  if (AllPlayersGone ||
-      !ask_if_really_quit ||
-      level_editor_test_game ||
-      Request("Do you really want to quit the game ?",
-             REQ_ASK | REQ_STAY_CLOSED))
+  if (skip_request || Request(message, REQ_ASK | REQ_STAY_CLOSED))
   {
 #if defined(NETWORK_AVALIABLE)
     if (options.network)
-      SendToServer_StopPlaying();
+      SendToServer_StopPlaying(NETWORK_STOP_BY_PLAYER);
     else
 #endif
     {
-      game_status = GAME_MODE_MAIN;
-      DrawMainMenu();
+      if (quick_quit)
+      {
+#if 1
+
+#if 1
+       FadeSkipNextFadeIn();
+#else
+       fading = fading_none;
+#endif
+
+#else
+       OpenDoor(DOOR_CLOSE_1);
+#endif
+
+       game_status = GAME_MODE_MAIN;
+
+#if 1
+       DrawAndFadeInMainMenu(REDRAW_FIELD);
+#else
+       DrawMainMenu();
+#endif
+      }
+      else
+      {
+#if 0
+       FadeOut(REDRAW_FIELD);
+#endif
+
+       game_status = GAME_MODE_MAIN;
+
+       DrawAndFadeInMainMenu(REDRAW_FIELD);
+      }
     }
   }
-  else
+  else         /* continue playing the game */
   {
     if (tape.playing && tape.deactivate_display)
       TapeDeactivateDisplayOff(TRUE);
@@ -10427,6 +14634,325 @@ void RequestQuitGame(boolean ask_if_really_quit)
   }
 }
 
+void RequestQuitGame(boolean ask_if_really_quit)
+{
+  boolean quick_quit = (!ask_if_really_quit || level_editor_test_game);
+  boolean skip_request = AllPlayersGone || quick_quit;
+
+  RequestQuitGameExt(skip_request, quick_quit,
+                    "Do you really want to quit the game ?");
+}
+
+
+/* ------------------------------------------------------------------------- */
+/* random generator functions                                                */
+/* ------------------------------------------------------------------------- */
+
+unsigned int InitEngineRandom_RND(long seed)
+{
+  game.num_random_calls = 0;
+
+#if 0
+  unsigned int rnd_seed = InitEngineRandom(seed);
+
+  printf("::: START RND: %d\n", rnd_seed);
+
+  return rnd_seed;
+#else
+
+  return InitEngineRandom(seed);
+
+#endif
+
+}
+
+unsigned int RND(int max)
+{
+  if (max > 0)
+  {
+    game.num_random_calls++;
+
+    return GetEngineRandom(max);
+  }
+
+  return 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+/* game engine snapshot handling functions                                   */
+/* ------------------------------------------------------------------------- */
+
+#define ARGS_ADDRESS_AND_SIZEOF(x)             (&(x)), (sizeof(x))
+
+struct EngineSnapshotInfo
+{
+  /* runtime values for custom element collect score */
+  int collect_score[NUM_CUSTOM_ELEMENTS];
+
+  /* runtime values for group element choice position */
+  int choice_pos[NUM_GROUP_ELEMENTS];
+
+  /* runtime values for belt position animations */
+  int belt_graphic[4 * NUM_BELT_PARTS];
+  int belt_anim_mode[4 * NUM_BELT_PARTS];
+};
+
+struct EngineSnapshotNodeInfo
+{
+  void *buffer_orig;
+  void *buffer_copy;
+  int size;
+};
+
+static struct EngineSnapshotInfo engine_snapshot_rnd;
+static ListNode *engine_snapshot_list = NULL;
+static char *snapshot_level_identifier = NULL;
+static int snapshot_level_nr = -1;
+
+void FreeEngineSnapshot()
+{
+  while (engine_snapshot_list != NULL)
+    deleteNodeFromList(&engine_snapshot_list, engine_snapshot_list->key,
+                      checked_free);
+
+  setString(&snapshot_level_identifier, NULL);
+  snapshot_level_nr = -1;
+}
+
+static void SaveEngineSnapshotValues_RND()
+{
+  static int belt_base_active_element[4] =
+  {
+    EL_CONVEYOR_BELT_1_LEFT_ACTIVE,
+    EL_CONVEYOR_BELT_2_LEFT_ACTIVE,
+    EL_CONVEYOR_BELT_3_LEFT_ACTIVE,
+    EL_CONVEYOR_BELT_4_LEFT_ACTIVE
+  };
+  int i, j;
+
+  for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+  {
+    int element = EL_CUSTOM_START + i;
+
+    engine_snapshot_rnd.collect_score[i] = element_info[element].collect_score;
+  }
+
+  for (i = 0; i < NUM_GROUP_ELEMENTS; i++)
+  {
+    int element = EL_GROUP_START + i;
+
+    engine_snapshot_rnd.choice_pos[i] = element_info[element].group->choice_pos;
+  }
+
+  for (i = 0; i < 4; i++)
+  {
+    for (j = 0; j < NUM_BELT_PARTS; j++)
+    {
+      int element = belt_base_active_element[i] + j;
+      int graphic = el2img(element);
+      int anim_mode = graphic_info[graphic].anim_mode;
+
+      engine_snapshot_rnd.belt_graphic[i * 4 + j] = graphic;
+      engine_snapshot_rnd.belt_anim_mode[i * 4 + j] = anim_mode;
+    }
+  }
+}
+
+static void LoadEngineSnapshotValues_RND()
+{
+  unsigned long num_random_calls = game.num_random_calls;
+  int i, j;
+
+  for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+  {
+    int element = EL_CUSTOM_START + i;
+
+    element_info[element].collect_score = engine_snapshot_rnd.collect_score[i];
+  }
+
+  for (i = 0; i < NUM_GROUP_ELEMENTS; i++)
+  {
+    int element = EL_GROUP_START + i;
+
+    element_info[element].group->choice_pos = engine_snapshot_rnd.choice_pos[i];
+  }
+
+  for (i = 0; i < 4; i++)
+  {
+    for (j = 0; j < NUM_BELT_PARTS; j++)
+    {
+      int graphic = engine_snapshot_rnd.belt_graphic[i * 4 + j];
+      int anim_mode = engine_snapshot_rnd.belt_anim_mode[i * 4 + j];
+
+      graphic_info[graphic].anim_mode = anim_mode;
+    }
+  }
+
+  if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
+  {
+    InitRND(tape.random_seed);
+    for (i = 0; i < num_random_calls; i++)
+      RND(1);
+  }
+
+  if (game.num_random_calls != num_random_calls)
+  {
+    Error(ERR_INFO, "number of random calls out of sync");
+    Error(ERR_INFO, "number of random calls should be %d", num_random_calls);
+    Error(ERR_INFO, "number of random calls is %d", game.num_random_calls);
+    Error(ERR_EXIT, "this should not happen -- please debug");
+  }
+}
+
+static void SaveEngineSnapshotBuffer(void *buffer, int size)
+{
+  struct EngineSnapshotNodeInfo *bi =
+    checked_calloc(sizeof(struct EngineSnapshotNodeInfo));
+
+  bi->buffer_orig = buffer;
+  bi->buffer_copy = checked_malloc(size);
+  bi->size = size;
+
+  memcpy(bi->buffer_copy, buffer, size);
+
+  addNodeToList(&engine_snapshot_list, NULL, bi);
+}
+
+void SaveEngineSnapshot()
+{
+  FreeEngineSnapshot();                /* free previous snapshot, if needed */
+
+  if (level_editor_test_game)  /* do not save snapshots from editor */
+    return;
+
+  /* copy some special values to a structure better suited for the snapshot */
+
+  SaveEngineSnapshotValues_RND();
+  SaveEngineSnapshotValues_EM();
+
+  /* save values stored in special snapshot structure */
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(engine_snapshot_rnd));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(engine_snapshot_em));
+
+  /* save further RND engine values */
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(stored_player));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(game));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(tape));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ZX));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ZY));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ExitX));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ExitY));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(FrameCounter));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(TimeFrames));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(TimePlayed));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(TimeLeft));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(TapeTime));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ScreenMovDir));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ScreenMovPos));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ScreenGfxPos));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ScrollStepSize));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(AllPlayersGone));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(AmoebaCnt));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(AmoebaCnt2));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(Feld));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(MovPos));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(MovDir));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(MovDelay));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ChangeDelay));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ChangePage));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(CustomValue));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(Store));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(Store2));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(StorePlayer));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(Back));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(AmoebaNr));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(WasJustMoving));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(WasJustFalling));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(CheckCollision));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(CheckImpact));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(Stop));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(Pushed));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ChangeCount));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ChangeEvent));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ExplodePhase));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ExplodeDelay));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(ExplodeField));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(RunnerVisit));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(PlayerVisit));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(GfxFrame));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(GfxRandom));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(GfxElement));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(GfxAction));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(GfxDir));
+
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(scroll_x));
+  SaveEngineSnapshotBuffer(ARGS_ADDRESS_AND_SIZEOF(scroll_y));
+
+  /* save level identification information */
+
+  setString(&snapshot_level_identifier, leveldir_current->identifier);
+  snapshot_level_nr = level_nr;
+
+#if 0
+  ListNode *node = engine_snapshot_list;
+  int num_bytes = 0;
+
+  while (node != NULL)
+  {
+    num_bytes += ((struct EngineSnapshotNodeInfo *)node->content)->size;
+
+    node = node->next;
+  }
+
+  printf("::: size of engine snapshot: %d bytes\n", num_bytes);
+#endif
+}
+
+static void LoadEngineSnapshotBuffer(struct EngineSnapshotNodeInfo *bi)
+{
+  memcpy(bi->buffer_orig, bi->buffer_copy, bi->size);
+}
+
+void LoadEngineSnapshot()
+{
+  ListNode *node = engine_snapshot_list;
+
+  if (engine_snapshot_list == NULL)
+    return;
+
+  while (node != NULL)
+  {
+    LoadEngineSnapshotBuffer((struct EngineSnapshotNodeInfo *)node->content);
+
+    node = node->next;
+  }
+
+  /* restore special values from snapshot structure */
+
+  LoadEngineSnapshotValues_RND();
+  LoadEngineSnapshotValues_EM();
+}
+
+boolean CheckEngineSnapshot()
+{
+  return (strEqual(snapshot_level_identifier, leveldir_current->identifier) &&
+         snapshot_level_nr == level_nr);
+}
+
 
 /* ---------- new game button stuff ---------------------------------------- */
 
@@ -10447,11 +14973,50 @@ void RequestQuitGame(boolean ask_if_really_quit)
 
 static struct
 {
-  int x, y;
+  int *x, *y;
+  int gd_x, gd_y;
   int gadget_id;
   char *infotext;
 } gamebutton_info[NUM_GAME_BUTTONS] =
 {
+#if 1
+  {
+    &game.button.stop.x,       &game.button.stop.y,
+    GAME_BUTTON_STOP_XPOS,     GAME_BUTTON_YPOS,
+    GAME_CTRL_ID_STOP,
+    "stop game"
+  },
+  {
+    &game.button.pause.x,      &game.button.pause.y,
+    GAME_BUTTON_PAUSE_XPOS,    GAME_BUTTON_YPOS,
+    GAME_CTRL_ID_PAUSE,
+    "pause game"
+  },
+  {
+    &game.button.play.x,       &game.button.play.y,
+    GAME_BUTTON_PLAY_XPOS,     GAME_BUTTON_YPOS,
+    GAME_CTRL_ID_PLAY,
+    "play game"
+  },
+  {
+    &game.button.sound_music.x,        &game.button.sound_music.y,
+    SOUND_BUTTON_MUSIC_XPOS,   SOUND_BUTTON_YPOS,
+    SOUND_CTRL_ID_MUSIC,
+    "background music on/off"
+  },
+  {
+    &game.button.sound_loops.x,        &game.button.sound_loops.y,
+    SOUND_BUTTON_LOOPS_XPOS,   SOUND_BUTTON_YPOS,
+    SOUND_CTRL_ID_LOOPS,
+    "sound loops on/off"
+  },
+  {
+    &game.button.sound_simple.x,&game.button.sound_simple.y,
+    SOUND_BUTTON_SIMPLE_XPOS,  SOUND_BUTTON_YPOS,
+    SOUND_CTRL_ID_SIMPLE,
+    "normal sounds on/off"
+  }
+#else
   {
     GAME_BUTTON_STOP_XPOS,     GAME_BUTTON_YPOS,
     GAME_CTRL_ID_STOP,
@@ -10482,6 +15047,7 @@ static struct
     SOUND_CTRL_ID_SIMPLE,
     "normal sounds on/off"
   }
+#endif
 };
 
 void CreateGameButtons()
@@ -10495,12 +15061,15 @@ void CreateGameButtons()
     int button_type;
     boolean checked;
     unsigned long event_mask;
+    int x, y;
     int gd_xoffset, gd_yoffset;
     int gd_x1, gd_x2, gd_y1, gd_y2;
     int id = i;
 
-    gd_xoffset = gamebutton_info[i].x;
-    gd_yoffset = gamebutton_info[i].y;
+    x = DX + *gamebutton_info[i].x;
+    y = DY + *gamebutton_info[i].y;
+    gd_xoffset = gamebutton_info[i].gd_x;
+    gd_yoffset = gamebutton_info[i].gd_y;
     gd_x1 = DOOR_GFX_PAGEX4 + gd_xoffset;
     gd_x2 = DOOR_GFX_PAGEX3 + gd_xoffset;
 
@@ -10528,8 +15097,13 @@ void CreateGameButtons()
 
     gi = CreateGadget(GDI_CUSTOM_ID, id,
                      GDI_INFO_TEXT, gamebutton_info[i].infotext,
+#if 1
+                     GDI_X, x,
+                     GDI_Y, y,
+#else
                      GDI_X, DX + gd_xoffset,
                      GDI_Y, DY + gd_yoffset,
+#endif
                      GDI_WIDTH, GAME_BUTTON_XSIZE,
                      GDI_HEIGHT, GAME_BUTTON_YSIZE,
                      GDI_TYPE, button_type,
@@ -10584,7 +15158,10 @@ static void HandleGameButtons(struct GadgetInfo *gi)
   switch (id)
   {
     case GAME_CTRL_ID_STOP:
-      RequestQuitGame(TRUE);
+      if (tape.playing)
+       TapeStop();
+      else
+       RequestQuitGame(TRUE);
       break;
 
     case GAME_CTRL_ID_PAUSE:
@@ -10611,7 +15188,7 @@ static void HandleGameButtons(struct GadgetInfo *gi)
 #endif
        {
          tape.pausing = FALSE;
-         DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
+         DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF, 0);
        }
       }
       break;