X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fgame.c;h=c75171ba1306cd893467e33428f739e204f7a2ce;hb=9de8eede744c45187c7011543ef8097d1ebc879c;hp=0561c22c2afbc7d07601ec8378a241641b99f11e;hpb=1256664ceac31f448a0139edd3bd0dc8fa5a8697;p=rocksndiamonds.git

diff --git a/src/game.c b/src/game.c
index 0561c22c..3051f5ac 100644
--- a/src/game.c
+++ b/src/game.c
@@ -1,3564 +1,7795 @@
 /***********************************************************
-*  Rocks'n'Diamonds -- McDuffin Strikes Back!              *
+* Rocks'n'Diamonds -- McDuffin Strikes Back!               *
 *----------------------------------------------------------*
-*  ©1995 Artsoft Development                               *
-*        Holger Schemel                                    *
-*        33659 Bielefeld-Senne                             *
-*        Telefon: (0521) 493245                            *
-*        eMail: aeglos@valinor.owl.de                      *
-*               aeglos@uni-paderborn.de                    *
-*               q99492@pbhrzx.uni-paderborn.de             *
+* (c) 1995-2002 Artsoft Entertainment                      *
+*               Holger Schemel                             *
+*               Detmolder Strasse 189                      *
+*               33604 Bielefeld                            *
+*               Germany                                    *
+*               e-mail: info@artsoft.org                   *
 *----------------------------------------------------------*
-*  game.c                                                  *
+* game.c                                                   *
 ***********************************************************/
 
+#include "libgame/libgame.h"
+
 #include "game.h"
-#include "misc.h"
+#include "init.h"
 #include "tools.h"
 #include "screens.h"
-#include "sound.h"
-#include "init.h"
-#include "buttons.h"
 #include "files.h"
 #include "tape.h"
-#include "joystick.h"
+#include "network.h"
+
+/* this switch controls how rocks move horizontally */
+#define OLD_GAME_BEHAVIOUR	FALSE
+
+/* EXPERIMENTAL STUFF */
+#define USE_NEW_AMOEBA_CODE	FALSE
+
+/* for DigField() */
+#define DF_NO_PUSH		0
+#define DF_DIG			1
+#define DF_SNAP			2
+
+/* for MoveFigure() */
+#define MF_NO_ACTION		0
+#define MF_MOVING		1
+#define MF_ACTION		2
+
+/* for ScrollFigure() */
+#define SCROLL_INIT		0
+#define SCROLL_GO_ON		1
+
+/* for Explode() */
+#define EX_PHASE_START		0
+#define EX_NO_EXPLOSION		0
+#define EX_NORMAL		1
+#define EX_CENTER		2
+#define EX_BORDER		3
+
+/* 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_TIME			29
+#define YY_TIME			194
+
+/* special positions in the game control window (relative to main window) */
+#define DX_LEVEL		(DX + XX_LEVEL)
+#define DY_LEVEL		(DY + YY_LEVEL)
+#define DX_EMERALDS		(DX + XX_EMERALDS)
+#define DY_EMERALDS		(DY + YY_EMERALDS)
+#define DX_DYNAMITE		(DX + XX_DYNAMITE)
+#define DY_DYNAMITE		(DY + YY_DYNAMITE)
+#define DX_KEYS			(DX + XX_KEYS)
+#define DY_KEYS			(DY + YY_KEYS)
+#define DX_SCORE		(DX + XX_SCORE)
+#define DY_SCORE		(DY + YY_SCORE)
+#define DX_TIME			(DX + XX_TIME)
+#define DY_TIME			(DY + YY_TIME)
+
+/* 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_NORMAL_SPEED	8
+#define MOVE_DELAY_HIGH_SPEED	4
+
+#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 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	INIT_GFX_RANDOM()	(SimpleRND(1000000))
+
+#define GET_NEW_PUSH_DELAY(e)	(   (element_info[e].push_delay_fixed) + \
+				 RND(element_info[e].push_delay_random))
+#define GET_NEW_MOVE_DELAY(e)	(   (element_info[e].move_delay_fixed) + \
+				 RND(element_info[e].move_delay_random))
+
+#define ELEMENT_CAN_ENTER_FIELD_GENERIC(e, x, y, condition)		\
+		(IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||		\
+					(condition) ||			\
+					(DONT_COLLIDE_WITH(e) &&	\
+					 IS_FREE_OR_PLAYER(x, y))))
+
+#define ELEMENT_CAN_ENTER_FIELD_GENERIC_2(x, y, condition)		\
+		(IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||		\
+					(condition)))
+
+#define ELEMENT_CAN_ENTER_FIELD(e, x, y)				\
+	ELEMENT_CAN_ENTER_FIELD_GENERIC(e, x, y, 0)
+
+#define ELEMENT_CAN_ENTER_FIELD_OR_ACID(e, x, y)			\
+	ELEMENT_CAN_ENTER_FIELD_GENERIC(e, x, y, (Feld[x][y] == EL_ACID))
+
+#define ELEMENT_CAN_ENTER_FIELD_OR_ACID_2(x, y)				\
+	ELEMENT_CAN_ENTER_FIELD_GENERIC_2(x, y, (Feld[x][y] == EL_ACID))
+
+#define ENEMY_CAN_ENTER_FIELD(x, y) (IN_LEV_FIELD(x, y) && IS_FREE(x, y))
+
+#define YAMYAM_CAN_ENTER_FIELD(x, y)					\
+		(IN_LEV_FIELD(x, y) && (IS_FREE_OR_PLAYER(x, y) ||	\
+					Feld[x][y] == EL_DIAMOND))
+
+#define DARK_YAMYAM_CAN_ENTER_FIELD(x, y)				\
+		(IN_LEV_FIELD(x, y) && (IS_FREE_OR_PLAYER(x, y) ||	\
+					IS_FOOD_DARK_YAMYAM(Feld[x][y])))
+
+#define PACMAN_CAN_ENTER_FIELD(x, y)					\
+		(IN_LEV_FIELD(x, y) && (IS_FREE_OR_PLAYER(x, y) ||	\
+					IS_AMOEBOID(Feld[x][y])))
+
+#define PIG_CAN_ENTER_FIELD(x, y)					\
+		(IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||		\
+					IS_FOOD_PIG(Feld[x][y])))
+
+#define PENGUIN_CAN_ENTER_FIELD(x, y)					\
+		(IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||		\
+					IS_FOOD_PENGUIN(Feld[x][y]) ||	\
+					Feld[x][y] == EL_EXIT_OPEN ||	\
+					Feld[x][y] == EL_ACID))
+
+#define MOLE_CAN_ENTER_FIELD(x, y, condition)				\
+		(IN_LEV_FIELD(x, y) && (IS_FREE(x, y) || (condition)))
+
+#define IN_LEV_FIELD_AND_IS_FREE(x, y)  (IN_LEV_FIELD(x, y) &&  IS_FREE(x, y))
+#define IN_LEV_FIELD_AND_NOT_FREE(x, y) (IN_LEV_FIELD(x, y) && !IS_FREE(x, y))
+
+/* game button identifiers */
+#define GAME_CTRL_ID_STOP		0
+#define GAME_CTRL_ID_PAUSE		1
+#define GAME_CTRL_ID_PLAY		2
+#define SOUND_CTRL_ID_MUSIC		3
+#define SOUND_CTRL_ID_LOOPS		4
+#define SOUND_CTRL_ID_SIMPLE		5
+
+#define NUM_GAME_BUTTONS		6
 
-void GetPlayerConfig()
-{
-  int old_joystick_nr = joystick_nr;
 
-  if (sound_status==SOUND_OFF)
-    player.setup &= ~SETUP_SOUND;
-  if (!sound_loops_allowed)
+/* forward declaration for internal use */
+
+static void InitBeltMovement(void);
+static void CloseAllOpenTimegates(void);
+static void CheckGravityMovement(struct PlayerInfo *);
+static void KillHeroUnlessProtected(int, int);
+
+static void TestIfPlayerTouchesCustomElement(int, int);
+static void TestIfElementTouchesCustomElement(int, int);
+
+static boolean CheckTriggeredElementChange(int, int, int, int);
+static boolean CheckElementChange(int, int, int, int);
+static void ChangeElementNow(int, int, int);
+
+static void PlaySoundLevel(int, int, int);
+static void PlaySoundLevelNearest(int, int, int);
+static void PlaySoundLevelAction(int, int, int);
+static void PlaySoundLevelElementAction(int, int, int, int);
+static void PlaySoundLevelActionIfLoop(int, int, int);
+static void StopSoundLevelActionIfLoop(int, int, int);
+
+static void MapGameButtons();
+static void HandleGameButtons(struct GadgetInfo *);
+
+static struct GadgetInfo *game_gadget[NUM_GAME_BUTTONS];
+
+
+/* ------------------------------------------------------------------------- */
+/* definition of elements that automatically change to other elements after  */
+/* a specified time, eventually calling a function when changing             */
+/* ------------------------------------------------------------------------- */
+
+/* forward declaration for changer functions */
+static void InitBuggyBase(int x, int y);
+static void WarnBuggyBase(int x, int y);
+
+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 x, int y);
+static void RunRobotWheel(int x, int y);
+static void StopRobotWheel(int x, int y);
+
+static void InitTimegateWheel(int x, int y);
+static void RunTimegateWheel(int x, int y);
+
+struct ChangingElementInfo
+{
+  int element;
+  int target_element;
+  int change_delay;
+  void (*pre_change_function)(int x, int y);
+  void (*change_function)(int x, int y);
+  void (*post_change_function)(int x, int y);
+};
+
+static struct ChangingElementInfo changing_element_list[] =
+{
   {
-    player.setup &= ~SETUP_SOUND_LOOPS;
-    player.setup &= ~SETUP_SOUND_MUSIC;
-  }
+    EL_NUT_BREAKING,
+    EL_EMERALD,
+    6,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_PEARL_BREAKING,
+    EL_EMPTY,
+    8,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_EXIT_OPENING,
+    EL_EXIT_OPEN,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_SWITCHGATE_OPENING,
+    EL_SWITCHGATE_OPEN,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_SWITCHGATE_CLOSING,
+    EL_SWITCHGATE_CLOSED,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_TIMEGATE_OPENING,
+    EL_TIMEGATE_OPEN,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_TIMEGATE_CLOSING,
+    EL_TIMEGATE_CLOSED,
+    29,
+    NULL,
+    NULL,
+    NULL
+  },
 
-  sound_on = sound_simple_on = SETUP_SOUND_ON(player.setup);
-  sound_loops_on = SETUP_SOUND_LOOPS_ON(player.setup);
-  sound_music_on = SETUP_SOUND_MUSIC_ON(player.setup);
-  toons_on = SETUP_TOONS_ON(player.setup);
-  direct_draw_on = SETUP_DIRECT_DRAW_ON(player.setup);
-  fading_on = SETUP_FADING_ON(player.setup);
-  autorecord_on = SETUP_AUTO_RECORD_ON(player.setup);
-  joystick_nr = SETUP_2ND_JOYSTICK_ON(player.setup);
-  quick_doors = SETUP_QUICK_DOORS_ON(player.setup);
-  scroll_delay_on = SETUP_SCROLL_DELAY_ON(player.setup);
-  soft_scrolling_on = SETUP_SOFT_SCROLL_ON(player.setup);
+  {
+    EL_ACID_SPLASH_LEFT,
+    EL_EMPTY,
+    8,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_ACID_SPLASH_RIGHT,
+    EL_EMPTY,
+    8,
+    NULL,
+    NULL,
+    NULL
+  },
+  {
+    EL_SP_BUGGY_BASE,
+    EL_SP_BUGGY_BASE_ACTIVATING,
+    0,
+    InitBuggyBase,
+    NULL,
+    NULL
+  },
+  {
+    EL_SP_BUGGY_BASE_ACTIVATING,
+    EL_SP_BUGGY_BASE_ACTIVE,
+    0,
+    InitBuggyBase,
+    NULL,
+    NULL
+  },
+  {
+    EL_SP_BUGGY_BASE_ACTIVE,
+    EL_SP_BUGGY_BASE,
+    0,
+    InitBuggyBase,
+    WarnBuggyBase,
+    NULL
+  },
+  {
+    EL_TRAP,
+    EL_TRAP_ACTIVE,
+    0,
+    InitTrap,
+    NULL,
+    ActivateTrap
+  },
+  {
+    EL_TRAP_ACTIVE,
+    EL_TRAP,
+    31,
+    NULL,
+    ChangeActiveTrap,
+    NULL
+  },
+  {
+    EL_ROBOT_WHEEL_ACTIVE,
+    EL_ROBOT_WHEEL,
+    0,
+    InitRobotWheel,
+    RunRobotWheel,
+    StopRobotWheel
+  },
+  {
+    EL_TIMEGATE_SWITCH_ACTIVE,
+    EL_TIMEGATE_SWITCH,
+    0,
+    InitTimegateWheel,
+    RunTimegateWheel,
+    NULL
+  },
 
-#ifndef MSDOS
-  if (joystick_nr != old_joystick_nr)
   {
-    if (joystick_device)
-      close(joystick_device);
-    InitJoystick();
+    EL_UNDEFINED,
+    EL_UNDEFINED,
+    -1,
+    NULL,
+    NULL,
+    NULL
   }
-#endif
+};
+
+struct
+{
+  int element;
+  int push_delay_fixed, push_delay_random;
 }
+push_delay_list[] =
+{
+  { EL_SPRING,			0, 0 },
+  { EL_BALLOON,			0, 0 },
 
-void InitGame()
+  { EL_SOKOBAN_OBJECT,		2, 0 },
+  { EL_SOKOBAN_FIELD_FULL,	2, 0 },
+  { EL_SATELLITE,		2, 0 },
+  { EL_SP_DISK_YELLOW,		2, 0 },
+
+  { EL_UNDEFINED,		0, 0 },
+};
+
+struct
 {
-  int i,x,y;
-  BOOL emulate_bd = TRUE;	/* unless non-BOULDERDASH elements found */
-  BOOL emulate_sb = TRUE;	/* unless non-SOKOBAN     elements found */
-
-  Dynamite = Score = 0;
-  Gems = level.edelsteine;
-  SokobanFields = Lights = Friends = 0;
-  DynaBombCount = DynaBombSize = DynaBombsLeft = 0;
-  DynaBombXL = FALSE;
-  Key[0] = Key[1] = Key[2] = Key[3] = FALSE;
-  MampferNr = 0;
-  FrameCounter = 0;
-  TimeFrames = 0;
-  TimeLeft = level.time;
-  ScreenMovPos = 0;
-  PlayerMovDir = MV_NO_MOVING;
-  PlayerMovPos = 0;
-  PlayerGfxPos = 0;
-  PlayerFrame = 0;
-  PlayerPushing = FALSE;
-  PlayerGone = LevelSolved = GameOver = SiebAktiv = FALSE;
-  JX = JY = 0;
-  ZX = ZY = -1;
+  int element;
+  int move_stepsize;
+}
+move_stepsize_list[] =
+{
+  { EL_AMOEBA_DROP,		2 },
+  { EL_AMOEBA_DROPPING,		2 },
+  { EL_QUICKSAND_FILLING,	1 },
+  { EL_QUICKSAND_EMPTYING,	1 },
+  { EL_MAGIC_WALL_FILLING,	2 },
+  { EL_BD_MAGIC_WALL_FILLING,	2 },
+  { EL_MAGIC_WALL_EMPTYING,	2 },
+  { EL_BD_MAGIC_WALL_EMPTYING,	2 },
+
+  { EL_UNDEFINED,		0 },
+};
+
+struct
+{
+  int element;
+  int gem_count;
+}
+gem_count_list[] =
+{
+  { EL_EMERALD,			1 },
+  { EL_BD_DIAMOND,		1 },
+  { EL_EMERALD_YELLOW,		1 },
+  { EL_EMERALD_RED,		1 },
+  { EL_EMERALD_PURPLE,		1 },
+  { EL_DIAMOND,			3 },
+  { EL_SP_INFOTRON,		1 },
+  { EL_PEARL,			5 },
+  { EL_CRYSTAL,			8 },
 
-  DigField(0,0,0,0,DF_NO_PUSH);
-  SnapField(0,0);
+  { EL_UNDEFINED,		0 },
+};
 
-  for(i=0;i<MAX_NUM_AMOEBA;i++)
-    AmoebaCnt[i] = AmoebaCnt2[i] = 0;
+static boolean changing_element[MAX_NUM_ELEMENTS];
+static unsigned long trigger_events[MAX_NUM_ELEMENTS];
 
-  for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
-  {
-    Feld[x][y] = Ur[x][y];
-    MovPos[x][y] = MovDir[x][y] = MovDelay[x][y] = 0;
-    Store[x][y] = Store2[x][y] = Frame[x][y] = AmoebaNr[x][y] = 0;
-    JustHit[x][y] = 0;
+#define IS_AUTO_CHANGING(e)	(changing_element[e])
+#define IS_JUST_CHANGING(x, y)	(ChangeDelay[x][y] != 0)
+#define IS_CHANGING(x, y)	(IS_AUTO_CHANGING(Feld[x][y]) || \
+				 IS_JUST_CHANGING(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;
 
-    switch(Feld[x][y])
-    {
-      case EL_SPIELFIGUR:
-      case EL_SPIELER1:
-	Feld[x][y] = EL_LEERRAUM;
-	JX = lastJX = x;
-	JY = lastJY = y;
-	break;
-      case EL_SPIELER2:
-	Feld[x][y] = EL_LEERRAUM;
-	break;
-      case EL_BADEWANNE:
-	if (x<lev_fieldx-1 && Feld[x+1][y]==EL_SALZSAEURE)
-	  Feld[x][y] = EL_BADEWANNE1;
-	else if (x>0 && Feld[x-1][y]==EL_SALZSAEURE)
-	  Feld[x][y] = EL_BADEWANNE2;
-	else if (y>0 && Feld[x][y-1]==EL_BADEWANNE1)
-	  Feld[x][y] = EL_BADEWANNE3;
-	else if (y>0 && Feld[x][y-1]==EL_SALZSAEURE)
-	  Feld[x][y] = EL_BADEWANNE4;
-	else if (y>0 && Feld[x][y-1]==EL_BADEWANNE2)
-	  Feld[x][y] = EL_BADEWANNE5;
-	break;
-      case EL_KAEFER_R:
-      case EL_KAEFER_O:
-      case EL_KAEFER_L:
-      case EL_KAEFER_U:
-      case EL_KAEFER:
-      case EL_FLIEGER_R:
-      case EL_FLIEGER_O:
-      case EL_FLIEGER_L:
-      case EL_FLIEGER_U:
-      case EL_FLIEGER:
-      case EL_BUTTERFLY_R:
-      case EL_BUTTERFLY_O:
-      case EL_BUTTERFLY_L:
-      case EL_BUTTERFLY_U:
-      case EL_BUTTERFLY:
-      case EL_FIREFLY_R:
-      case EL_FIREFLY_O:
-      case EL_FIREFLY_L:
-      case EL_FIREFLY_U:
-      case EL_FIREFLY:
-      case EL_PACMAN_R:
-      case EL_PACMAN_O:
-      case EL_PACMAN_L:
-      case EL_PACMAN_U:
-      case EL_MAMPFER:
-      case EL_MAMPFER2:
-      case EL_ROBOT:
-      case EL_PACMAN:
-	InitMovDir(x,y);
-	break;
-      case EL_AMOEBE_VOLL:
-      case EL_AMOEBE_BD:
-	InitAmoebaNr(x,y);
-	break;
-      case EL_TROPFEN:
-	if (y==lev_fieldy-1)
-	{
-	  Feld[x][y] = EL_AMOEBING;
-	  Store[x][y] = EL_AMOEBE_NASS;
-	}
-	break;
-      case EL_DYNAMIT:
-	MovDelay[x][y] = 96;
-	break;
-      case EL_BIRNE_AUS:
-	Lights++;
-	break;
-      case EL_SOKOBAN_FELD_LEER:
-	SokobanFields++;
-	break;
-      case EL_MAULWURF:
-      case EL_PINGUIN:
-	Friends++;
-	break;
-      case EL_SCHWEIN:
-      case EL_DRACHE:
-	MovDir[x][y] = 1<<RND(4);
-	break;
-      default:
-	break;
-    }
-  }
+void GetPlayerConfig()
+{
+  if (!audio.sound_available)
+    setup.sound = FALSE;
 
-  game_emulation = (emulate_bd ? EMU_BOULDERDASH :
-		    emulate_sb ? EMU_SOKOBAN : EMU_NONE);
+  if (!audio.loops_available)
+    setup.sound_loops = FALSE;
 
-  scroll_x = scroll_y = -1;
-  if (JX>=MIDPOSX-1)
-    scroll_x =
-      (JX<=lev_fieldx-MIDPOSX ? JX-MIDPOSX : lev_fieldx-SCR_FIELDX+1);
-  if (JY>=MIDPOSY-1)
-    scroll_y =
-      (JY<=lev_fieldy-MIDPOSY ? JY-MIDPOSY : lev_fieldy-SCR_FIELDY+1);
+  if (!audio.music_available)
+    setup.sound_music = FALSE;
 
-  CloseDoor(DOOR_CLOSE_1);
+  if (!video.fullscreen_available)
+    setup.fullscreen = FALSE;
 
-  DrawLevel();
-  DrawLevelElement(JX,JY,EL_SPIELFIGUR);
-  FadeToFront();
+  setup.sound_simple = setup.sound;
 
-  XCopyArea(display,pix[PIX_DOOR],pix[PIX_DB_DOOR],gc,
-	    DOOR_GFX_PAGEX5,DOOR_GFX_PAGEY1, DXSIZE,DYSIZE,
-	    DOOR_GFX_PAGEX1,DOOR_GFX_PAGEY1);
-  DrawTextExt(pix[PIX_DB_DOOR],gc,
-	      DOOR_GFX_PAGEX1+XX_LEVEL,DOOR_GFX_PAGEY1+YY_LEVEL,
-	      int2str(level_nr,2),FS_SMALL,FC_YELLOW);
-  DrawTextExt(pix[PIX_DB_DOOR],gc,
-	      DOOR_GFX_PAGEX1+XX_EMERALDS,DOOR_GFX_PAGEY1+YY_EMERALDS,
-	      int2str(Gems,3),FS_SMALL,FC_YELLOW);
-  DrawTextExt(pix[PIX_DB_DOOR],gc,
-	      DOOR_GFX_PAGEX1+XX_DYNAMITE,DOOR_GFX_PAGEY1+YY_DYNAMITE,
-	      int2str(Dynamite,3),FS_SMALL,FC_YELLOW);
-  DrawTextExt(pix[PIX_DB_DOOR],gc,
-	      DOOR_GFX_PAGEX1+XX_SCORE,DOOR_GFX_PAGEY1+YY_SCORE,
-	      int2str(Score,5),FS_SMALL,FC_YELLOW);
-  DrawTextExt(pix[PIX_DB_DOOR],gc,
-	      DOOR_GFX_PAGEX1+XX_TIME,DOOR_GFX_PAGEY1+YY_TIME,
-	      int2str(TimeLeft,3),FS_SMALL,FC_YELLOW);
-
-  DrawGameButton(BUTTON_GAME_STOP);
-  DrawGameButton(BUTTON_GAME_PAUSE);
-  DrawGameButton(BUTTON_GAME_PLAY);
-  DrawSoundDisplay(BUTTON_SOUND_MUSIC  | (BUTTON_ON * sound_music_on));
-  DrawSoundDisplay(BUTTON_SOUND_LOOPS  | (BUTTON_ON * sound_loops_on));
-  DrawSoundDisplay(BUTTON_SOUND_SIMPLE | (BUTTON_ON * sound_simple_on));
-  XCopyArea(display,drawto,pix[PIX_DB_DOOR],gc,
-	    DX+GAME_CONTROL_XPOS,DY+GAME_CONTROL_YPOS,
-	    GAME_CONTROL_XSIZE,2*GAME_CONTROL_YSIZE,
-	    DOOR_GFX_PAGEX1+GAME_CONTROL_XPOS,
-	    DOOR_GFX_PAGEY1+GAME_CONTROL_YPOS);
-
-  OpenDoor(DOOR_OPEN_1);
-
-  if (sound_music_on)
-    PlaySoundLoop(background_loop[level_nr % num_bg_loops]);
-
-  XAutoRepeatOff(display);
+  SetAudioMode(setup.sound);
+  InitJoysticks();
 }
 
-void InitMovDir(int x, int y)
+static int getBeltNrFromBeltElement(int element)
 {
-  int i, element = Feld[x][y];
-  static int xy[4][2] =
-  {
-    { 0,+1 },
-    { +1,0 },
-    { 0,-1 },
-    { -1,0 }
-  };
-  static int direction[2][4] =
+  return (element < EL_CONVEYOR_BELT_2_LEFT ? 0 :
+	  element < EL_CONVEYOR_BELT_3_LEFT ? 1 :
+	  element < EL_CONVEYOR_BELT_4_LEFT ? 2 : 3);
+}
+
+static int getBeltNrFromBeltActiveElement(int element)
+{
+  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);
+}
+
+static int getBeltNrFromBeltSwitchElement(int element)
+{
+  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);
+}
+
+static int getBeltDirNrFromBeltSwitchElement(int element)
+{
+  static int belt_base_element[4] =
   {
-    { MV_RIGHT, MV_UP,   MV_LEFT,  MV_DOWN },
-    { MV_LEFT,  MV_DOWN, MV_RIGHT, MV_UP }
+    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_4_SWITCH_LEFT
   };
 
-  switch(element)
-  {
-    case EL_KAEFER_R:
-    case EL_KAEFER_O:
-    case EL_KAEFER_L:
-    case EL_KAEFER_U:
-      Feld[x][y] = EL_KAEFER;
-      MovDir[x][y] = direction[0][element-EL_KAEFER_R];
-      break;
-    case EL_FLIEGER_R:
-    case EL_FLIEGER_O:
-    case EL_FLIEGER_L:
-    case EL_FLIEGER_U:
-      Feld[x][y] = EL_FLIEGER;
-      MovDir[x][y] = direction[0][element-EL_FLIEGER_R];
-      break;
-    case EL_BUTTERFLY_R:
-    case EL_BUTTERFLY_O:
-    case EL_BUTTERFLY_L:
-    case EL_BUTTERFLY_U:
-      Feld[x][y] = EL_BUTTERFLY;
-      MovDir[x][y] = direction[0][element-EL_BUTTERFLY_R];
-      break;
-    case EL_FIREFLY_R:
-    case EL_FIREFLY_O:
-    case EL_FIREFLY_L:
-    case EL_FIREFLY_U:
-      Feld[x][y] = EL_FIREFLY;
-      MovDir[x][y] = direction[0][element-EL_FIREFLY_R];
-      break;
-    case EL_PACMAN_R:
-    case EL_PACMAN_O:
-    case EL_PACMAN_L:
-    case EL_PACMAN_U:
-      Feld[x][y] = EL_PACMAN;
-      MovDir[x][y] = direction[0][element-EL_PACMAN_R];
-      break;
-    default:
-      MovDir[x][y] = 1<<RND(4);
-      if (element != EL_KAEFER &&
-	  element != EL_FLIEGER &&
-	  element != EL_BUTTERFLY &&
-	  element != EL_FIREFLY)
-	break;
+  int belt_nr = getBeltNrFromBeltSwitchElement(element);
+  int belt_dir_nr = element - belt_base_element[belt_nr];
 
-      for(i=0;i<4;i++)
-      {
-	int x1,y1;
+  return (belt_dir_nr % 3);
+}
 
-	x1 = x+xy[i][0];
-	y1 = y+xy[i][1];
+static int getBeltDirFromBeltSwitchElement(int element)
+{
+  static int belt_move_dir[3] =
+  {
+    MV_LEFT,
+    MV_NO_MOVING,
+    MV_RIGHT
+  };
 
-	if (!IN_LEV_FIELD(x1,y1) || !IS_FREE(x1,y1))
-	{
-	  if (element==EL_KAEFER || element==EL_BUTTERFLY)
-	  {
-	    MovDir[x][y] = direction[0][i];
-	    break;
-	  }
-	  else if (element==EL_FLIEGER || element==EL_FIREFLY)
-	  {
-	    MovDir[x][y] = direction[1][i];
-	    break;
-	  }
-	}
-      }
-      break;
-  }
+  int belt_dir_nr = getBeltDirNrFromBeltSwitchElement(element);
+
+  return belt_move_dir[belt_dir_nr];
 }
 
-void InitAmoebaNr(int x, int y)
+static void InitField(int x, int y, boolean init_game)
 {
-  int i;
-  int group_nr = AmoebeNachbarNr(x,y);
+  int element = Feld[x][y];
 
-  if (group_nr==0)
+  switch (element)
   {
-    for(i=1;i<MAX_NUM_AMOEBA;i++)
-    {
-      if (AmoebaCnt[i]==0)
+    case EL_SP_MURPHY:
+      if (init_game)
       {
-	group_nr = i;
-	break;
+	if (stored_player[0].present)
+	{
+	  Feld[x][y] = EL_SP_MURPHY_CLONE;
+	  break;
+	}
+	else
+	{
+	  stored_player[0].use_murphy_graphic = TRUE;
+	}
+
+	Feld[x][y] = EL_PLAYER_1;
       }
-    }
-  }
+      /* no break! */
+    case EL_PLAYER_1:
+    case EL_PLAYER_2:
+    case EL_PLAYER_3:
+    case EL_PLAYER_4:
+      if (init_game)
+      {
+	struct PlayerInfo *player = &stored_player[Feld[x][y] - EL_PLAYER_1];
+	int jx = player->jx, jy = player->jy;
 
-  AmoebaNr[x][y] = group_nr;
-  AmoebaCnt[group_nr]++;
-  AmoebaCnt2[group_nr]++;
-}
+	player->present = TRUE;
 
-void GameWon()
-{
-  int hi_pos;
-  int bumplevel = FALSE;
+	if (!options.network || player->connected)
+	{
+	  player->active = TRUE;
 
-  LevelSolved = FALSE;
+	  /* remove potentially duplicate players */
+	  if (StorePlayer[jx][jy] == Feld[x][y])
+	    StorePlayer[jx][jy] = 0;
 
-  if (TimeLeft)
-  {
-    if (sound_loops_on)
-      PlaySoundExt(SND_SIRR,PSND_MAX_VOLUME,PSND_MAX_RIGHT,PSND_LOOP);
+	  StorePlayer[x][y] = Feld[x][y];
 
-    while(TimeLeft>0)
-    {
-      if (!sound_loops_on)
-	PlaySoundStereo(SND_SIRR,PSND_MAX_RIGHT);
-      if (TimeLeft && !(TimeLeft % 10))
-	RaiseScore(level.score[SC_ZEITBONUS]);
-      if (TimeLeft > 100 && !(TimeLeft % 10))
-	TimeLeft -= 10;
-      else
-	TimeLeft--;
-      DrawText(DX_TIME,DY_TIME,int2str(TimeLeft,3),FS_SMALL,FC_YELLOW);
-      BackToFront();
-      Delay(10);
-    }
+	  if (options.debug)
+	  {
+	    printf("Player %d activated.\n", player->element_nr);
+	    printf("[Local player is %d and currently %s.]\n",
+		   local_player->element_nr,
+		   local_player->active ? "active" : "not active");
+	  }
+	}
 
-    if (sound_loops_on)
-      StopSound(SND_SIRR);
-  }
+	Feld[x][y] = EL_EMPTY;
+	player->jx = player->last_jx = x;
+	player->jy = player->last_jy = y;
+      }
+      break;
 
-  FadeSounds();
+    case EL_STONEBLOCK:
+      if (x < lev_fieldx-1 && Feld[x+1][y] == EL_ACID)
+	Feld[x][y] = EL_ACID_POOL_TOPLEFT;
+      else if (x > 0 && Feld[x-1][y] == EL_ACID)
+	Feld[x][y] = EL_ACID_POOL_TOPRIGHT;
+      else if (y > 0 && Feld[x][y-1] == EL_ACID_POOL_TOPLEFT)
+	Feld[x][y] = EL_ACID_POOL_BOTTOMLEFT;
+      else if (y > 0 && Feld[x][y-1] == EL_ACID)
+	Feld[x][y] = EL_ACID_POOL_BOTTOM;
+      else if (y > 0 && Feld[x][y-1] == EL_ACID_POOL_TOPRIGHT)
+	Feld[x][y] = EL_ACID_POOL_BOTTOMRIGHT;
+      break;
 
-  /* Hero disappears */
-  DrawLevelElement(ExitX,ExitY,Feld[ExitX][ExitY]);
-  BackToFront();
+    case EL_BUG_RIGHT:
+    case EL_BUG_UP:
+    case EL_BUG_LEFT:
+    case EL_BUG_DOWN:
+    case EL_BUG:
+    case EL_SPACESHIP_RIGHT:
+    case EL_SPACESHIP_UP:
+    case EL_SPACESHIP_LEFT:
+    case EL_SPACESHIP_DOWN:
+    case EL_SPACESHIP:
+    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_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_DARK_YAMYAM:
+    case EL_ROBOT:
+    case EL_PACMAN:
+    case EL_SP_SNIKSNAK:
+    case EL_SP_ELECTRON:
+    case EL_MOLE_LEFT:
+    case EL_MOLE_RIGHT:
+    case EL_MOLE_UP:
+    case EL_MOLE_DOWN:
+    case EL_MOLE:
+      InitMovDir(x, y);
+      break;
 
-  if (tape.playing)
-    return;
+    case EL_AMOEBA_FULL:
+    case EL_BD_AMOEBA:
+      InitAmoebaNr(x, y);
+      break;
 
-  CloseDoor(DOOR_CLOSE_1);
+    case EL_AMOEBA_DROP:
+      if (y == lev_fieldy - 1)
+      {
+	Feld[x][y] = EL_AMOEBA_GROWING;
+	Store[x][y] = EL_AMOEBA_WET;
+      }
+      break;
 
-  if (tape.recording)
-  {
-    TapeStop();
-    SaveLevelTape(tape.level_nr);	/* Ask to save tape */
-  }
+    case EL_DYNAMITE_ACTIVE:
+      MovDelay[x][y] = 96;
+      break;
 
-  if (level_nr==player.handicap &&
-      level_nr<leveldir[leveldir_nr].levels-1)
-  { 
-    player.handicap++; 
-    bumplevel = TRUE;
-    SavePlayerInfo(PLAYER_LEVEL);
-  }
+    case EL_LAMP:
+      local_player->lights_still_needed++;
+      break;
 
-  if ((hi_pos=NewHiScore())>=0) 
-  {
-    game_status = HALLOFFAME;
-    DrawHallOfFame(hi_pos);
-    if (bumplevel && TAPE_IS_EMPTY(tape))
-      level_nr++;
-  }
-  else
-  {
-    game_status = MAINMENU;
-    if (bumplevel && TAPE_IS_EMPTY(tape))
-      level_nr++;
-    DrawMainMenu();
-  }
+    case EL_SOKOBAN_FIELD_EMPTY:
+      local_player->sokobanfields_still_needed++;
+      break;
 
-  BackToFront();
-}
+    case EL_PENGUIN:
+      local_player->friends_still_needed++;
+      break;
 
-BOOL NewHiScore()
-{
-  int k,l;
-  int position = -1;
+    case EL_PIG:
+    case EL_DRAGON:
+      MovDir[x][y] = 1 << RND(4);
+      break;
 
-  LoadScore(level_nr);
+    case EL_SP_EMPTY:
+      Feld[x][y] = EL_EMPTY;
+      break;
 
-  if (!strcmp(player.alias_name,EMPTY_ALIAS) ||
-      Score<highscore[MAX_SCORE_ENTRIES-1].Score) 
-    return(-1);
+    case EL_EM_KEY_1_FILE:
+      Feld[x][y] = EL_EM_KEY_1;
+      break;
+    case EL_EM_KEY_2_FILE:
+      Feld[x][y] = EL_EM_KEY_2;
+      break;
+    case EL_EM_KEY_3_FILE:
+      Feld[x][y] = EL_EM_KEY_3;
+      break;
+    case EL_EM_KEY_4_FILE:
+      Feld[x][y] = EL_EM_KEY_4;
+      break;
 
-  for(k=0;k<MAX_SCORE_ENTRIES;k++) 
-  {
-    if (Score>highscore[k].Score)	/* Spieler kommt in Highscore-Liste */
-    {
-      if (k<MAX_SCORE_ENTRIES-1)
+    case EL_CONVEYOR_BELT_1_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_1_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_1_SWITCH_RIGHT:
+    case EL_CONVEYOR_BELT_2_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_2_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_2_SWITCH_RIGHT:
+    case EL_CONVEYOR_BELT_3_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_3_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_3_SWITCH_RIGHT:
+    case EL_CONVEYOR_BELT_4_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_4_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_4_SWITCH_RIGHT:
+      if (init_game)
       {
-	int m = MAX_SCORE_ENTRIES-1;
-
-#ifdef ONE_PER_NAME
-	for(l=k;l<MAX_SCORE_ENTRIES;l++)
-	  if (!strcmp(player.alias_name,highscore[l].Name))
-	    m = l;
-	if (m==k)	/* Spieler überschreibt seine alte Position */
-	  goto put_into_list;
-#endif
+	int belt_nr = getBeltNrFromBeltSwitchElement(Feld[x][y]);
+	int belt_dir = getBeltDirFromBeltSwitchElement(Feld[x][y]);
+	int belt_dir_nr = getBeltDirNrFromBeltSwitchElement(Feld[x][y]);
 
-	for(l=m;l>k;l--)
+	if (game.belt_dir_nr[belt_nr] == 3)	/* initial value */
+	{
+	  game.belt_dir[belt_nr] = belt_dir;
+	  game.belt_dir_nr[belt_nr] = belt_dir_nr;
+	}
+	else	/* more than one switch -- set it like the first switch */
 	{
-	  strcpy(highscore[l].Name,highscore[l-1].Name);
-	  highscore[l].Score = highscore[l-1].Score;
+	  Feld[x][y] = Feld[x][y] - belt_dir_nr + game.belt_dir_nr[belt_nr];
 	}
       }
+      break;
 
-#ifdef ONE_PER_NAME
-      put_into_list:
-#endif
-      sprintf(highscore[k].Name,player.alias_name);
-      highscore[k].Score = Score; 
-      position = k;
+    case EL_SWITCHGATE_SWITCH_DOWN:	/* always start with same switch pos */
+      if (init_game)
+	Feld[x][y] = EL_SWITCHGATE_SWITCH_UP;
       break;
-    }
 
-#ifdef ONE_PER_NAME
-    else if (!strcmp(player.alias_name,highscore[k].Name))
-      break;	/* Spieler schon mit besserer Punktzahl in der Liste */
-#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);
+      break;
   }
-
-  if (position>=0) 
-    SaveScore(level_nr);
-
-  return(position);
 }
 
-void InitMovingField(int x, int y, int direction)
+void DrawGameDoorValues()
 {
-  int newx = x + (direction==MV_LEFT ? -1 : direction==MV_RIGHT ? +1 : 0);
-  int newy = y + (direction==MV_UP   ? -1 : direction==MV_DOWN  ? +1 : 0);
-
-  MovDir[x][y] = direction;
-  MovDir[newx][newy] = direction;
-  if (Feld[newx][newy] == EL_LEERRAUM)
-    Feld[newx][newy] = EL_BLOCKED;
+  int i, j;
+
+  for (i=0; i<MAX_PLAYERS; i++)
+    for (j=0; j<4; j++)
+      if (stored_player[i].key[j])
+	DrawMiniGraphicExt(drawto, DX_KEYS + j * MINI_TILEX, DY_KEYS,
+			   el2edimg(EL_KEY_1 + j));
+
+  DrawText(DX + XX_EMERALDS, DY + YY_EMERALDS,
+	   int2str(local_player->gems_still_needed, 3), FONT_TEXT_2);
+  DrawText(DX + XX_DYNAMITE, DY + YY_DYNAMITE,
+	   int2str(local_player->dynamite, 3), FONT_TEXT_2);
+  DrawText(DX + XX_SCORE, DY + YY_SCORE,
+	   int2str(local_player->score, 5), FONT_TEXT_2);
+  DrawText(DX + XX_TIME, DY + YY_TIME,
+	   int2str(TimeLeft, 3), FONT_TEXT_2);
 }
 
-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);
 
-  *goes_to_x = newx;
-  *goes_to_y = newy;
-}
+/*
+  =============================================================================
+  InitGameEngine()
+  -----------------------------------------------------------------------------
+  initialize game engine due to level / tape version number
+  =============================================================================
+*/
 
-void Blocked2Moving(int x, int y, int *comes_from_x, int *comes_from_y)
+static void InitGameEngine()
 {
-  int oldx = x, oldy = y;
-  int direction = MovDir[x][y];
+  int i;
 
-  if (direction==MV_LEFT)
-    oldx++;
-  else if (direction==MV_RIGHT)
-    oldx--;
-  else if (direction==MV_UP)
-    oldy++;
-  else if (direction==MV_DOWN)
-    oldy--;
+  /* set game engine from tape file when re-playing, else from level file */
+  game.engine_version = (tape.playing ? tape.engine_version :
+			 level.game_version);
 
-  *comes_from_x = oldx;
-  *comes_from_y = oldy;
-}
+  /* dynamically adjust element properties according to game engine version */
+  InitElementPropertiesEngine(game.engine_version);
 
-int MovingOrBlocked2Element(int x, int y)
-{
-  int element = Feld[x][y];
+#if 0
+    printf("level %d: level version == %06d\n", level_nr, level.game_version);
+    printf("          tape version == %06d [%s] [file: %06d]\n",
+	   tape.engine_version, (tape.playing ? "PLAYING" : "RECORDING"),
+	   tape.file_version);
+    printf("       => game.engine_version == %06d\n", game.engine_version);
+#endif
 
-  if (element==EL_BLOCKED)
-  {
-    int oldx,oldy;
+  /* ---------- initialize player's initial move delay --------------------- */
 
-    Blocked2Moving(x,y,&oldx,&oldy);
-    return(Feld[oldx][oldy]);
-  }
-  else
-    return(element);
-}
+  /* dynamically adjust player properties according to game engine version */
+  game.initial_move_delay =
+    (game.engine_version <= VERSION_IDENT(2,0,1) ? INITIAL_MOVE_DELAY_ON :
+     INITIAL_MOVE_DELAY_OFF);
 
-void RemoveMovingField(int x, int y)
-{
-  int oldx = x,oldy = y, newx = x,newy = y;
+  /* dynamically adjust player properties according to level information */
+  game.initial_move_delay_value =
+    (level.double_speed ? MOVE_DELAY_HIGH_SPEED : MOVE_DELAY_NORMAL_SPEED);
 
-  if (Feld[x][y] != EL_BLOCKED && !IS_MOVING(x,y))
-    return;
+  /* ---------- initialize changing elements ------------------------------- */
 
-  if (IS_MOVING(x,y))
+  /* initialize changing elements information */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
   {
-    Moving2Blocked(x,y,&newx,&newy);
-    if (Feld[newx][newy] != EL_BLOCKED)
-      return;
+#if 1
+    element_info[i].change.pre_change_function = NULL;
+    element_info[i].change.change_function = NULL;
+    element_info[i].change.post_change_function = NULL;
+
+    if (!IS_CUSTOM_ELEMENT(i))
+    {
+      element_info[i].change.target_element = EL_EMPTY_SPACE;
+      element_info[i].change.delay_fixed = 0;
+      element_info[i].change.delay_random = 0;
+      element_info[i].change.delay_frames = 1;
+    }
+
+    changing_element[i] = FALSE;
+#else
+    changing_element[i].base_element = EL_UNDEFINED;
+    changing_element[i].next_element = EL_UNDEFINED;
+    changing_element[i].change_delay = -1;
+    changing_element[i].pre_change_function = NULL;
+    changing_element[i].change_function = NULL;
+    changing_element[i].post_change_function = NULL;
+#endif
   }
-  else if (Feld[x][y]==EL_BLOCKED)
+
+  /* add changing elements from pre-defined list */
+  for (i=0; changing_element_list[i].element != EL_UNDEFINED; i++)
   {
-    Blocked2Moving(x,y,&oldx,&oldy);
-    if (!IS_MOVING(oldx,oldy))
-      return;
+    int element = changing_element_list[i].element;
+    struct ChangingElementInfo *ce = &changing_element_list[i];
+    struct ElementChangeInfo *change = &element_info[element].change;
+
+#if 1
+    change->target_element       = ce->target_element;
+    change->delay_fixed          = ce->change_delay;
+    change->pre_change_function  = ce->pre_change_function;
+    change->change_function      = ce->change_function;
+    change->post_change_function = ce->post_change_function;
+
+    changing_element[element] = TRUE;
+#else
+    changing_element[element].base_element         = ce->base_element;
+    changing_element[element].next_element         = ce->next_element;
+    changing_element[element].change_delay         = ce->change_delay;
+    changing_element[element].pre_change_function  = ce->pre_change_function;
+    changing_element[element].change_function      = ce->change_function;
+    changing_element[element].post_change_function = ce->post_change_function;
+#endif
   }
 
-  if (Feld[x][y]==EL_BLOCKED &&
-      (Store[oldx][oldy]==EL_MORAST_LEER ||
-       Store[oldx][oldy]==EL_SIEB_LEER ||
-       Store[oldx][oldy]==EL_SIEB2_LEER ||
-       Store[oldx][oldy]==EL_AMOEBE_NASS))
+  /* add changing elements from custom element configuration */
+  for (i=0; i < NUM_CUSTOM_ELEMENTS; i++)
   {
-    Feld[oldx][oldy] = Store[oldx][oldy];
-    Store[oldx][oldy] = Store2[oldx][oldy] = 0;
-  }
-  else
-    Feld[oldx][oldy] = EL_LEERRAUM;
+    int element = EL_CUSTOM_START + i;
+#if 0
+    struct ElementChangeInfo *change = &element_info[element].change;
+#endif
+
+    /* only add custom elements that change after fixed/random frame delay */
+    if (!CAN_CHANGE(element) || !HAS_CHANGE_EVENT(element, CE_DELAY))
+      continue;
 
-  Feld[newx][newy] = EL_LEERRAUM;
-  MovPos[oldx][oldy] = MovDir[oldx][oldy] = MovDelay[oldx][oldy] = 0;
-  MovPos[newx][newy] = MovDir[newx][newy] = MovDelay[newx][newy] = 0;
+#if 1
+    changing_element[element] = TRUE;
+#else
+    changing_element[element].base_element = element;
+    changing_element[element].next_element = change->target_element;
+    changing_element[element].change_delay = (change->delay_fixed *
+					      change->delay_frames);
+#endif
+  }
 
-  DrawLevelField(oldx,oldy);
-  DrawLevelField(newx,newy);
-}
+  /* ---------- initialize trigger events ---------------------------------- */
 
-void DrawDynamite(int x, int y)
-{
-  int sx = SCROLLX(x), sy = SCROLLY(y);
-  int graphic = el2gfx(Feld[x][y]);
-  int phase;
+  /* initialize trigger events information */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    trigger_events[i] = EP_BITMASK_DEFAULT;
 
-  if (!IN_SCR_FIELD(sx,sy) || IS_PLAYER(x,y))
-    return;
+  /* add trigger events from element change event properties */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    if (HAS_CHANGE_EVENT(i, CE_BY_OTHER))
+      trigger_events[element_info[i].change.trigger_element] |=
+	element_info[i].change.events;
 
-  if (Store[x][y])
-    DrawGraphic(sx,sy, el2gfx(Store[x][y]));
+  /* ---------- initialize push delay -------------------------------------- */
 
-  if (Feld[x][y]==EL_DYNAMIT)
+  /* initialize push delay values to default */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
   {
-    if ((phase = (96-MovDelay[x][y])/12) > 6)
-      phase = 6;
+    if (!IS_CUSTOM_ELEMENT(i))
+    {
+      element_info[i].push_delay_fixed = 2;
+      element_info[i].push_delay_random = 8;
+    }
   }
-  else
+
+  /* set push delay value for certain elements from pre-defined list */
+  for (i=0; push_delay_list[i].element != EL_UNDEFINED; i++)
   {
-    if ((phase = ((96-MovDelay[x][y])/6) % 8) > 3)
-      phase = 7-phase;
+    int e = push_delay_list[i].element;
+
+    element_info[e].push_delay_fixed  = push_delay_list[i].push_delay_fixed;
+    element_info[e].push_delay_random = push_delay_list[i].push_delay_random;
   }
 
-  if (Store[x][y])
-    DrawGraphicThruMask(sx,sy, graphic + phase);
-  else
-    DrawGraphic(sx,sy, graphic + phase);
-}
+  /* ---------- initialize move stepsize ----------------------------------- */
 
-void CheckDynamite(int x, int y)
-{
-  if (MovDelay[x][y])		/* neues Dynamit / in Wartezustand */
-  {
-    MovDelay[x][y]--;
-    if (MovDelay[x][y])
-    {
-      if (!(MovDelay[x][y] % 12))
-	PlaySoundLevel(x,y,SND_ZISCH);
+  /* initialize move stepsize values to default */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    if (!IS_CUSTOM_ELEMENT(i))
+      element_info[i].move_stepsize = MOVE_STEPSIZE_NORMAL;
 
-      if (Feld[x][y]==EL_DYNAMIT && !(MovDelay[x][y] % 12))
-	DrawDynamite(x,y);
-      else if (Feld[x][y]==EL_DYNABOMB && !(MovDelay[x][y] % 6))
-	DrawDynamite(x,y);
+  /* set move stepsize value for certain elements from pre-defined list */
+  for (i=0; move_stepsize_list[i].element != EL_UNDEFINED; i++)
+  {
+    int e = move_stepsize_list[i].element;
 
-      return;
-    }
+    element_info[e].move_stepsize = move_stepsize_list[i].move_stepsize;
   }
 
-  StopSound(SND_ZISCH);
-  Bang(x,y);
+  /* ---------- initialize gem count --------------------------------------- */
+
+  /* initialize gem count values for each element */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    if (!IS_CUSTOM_ELEMENT(i))
+      element_info[i].gem_count = 0;
+
+  /* add gem count values for all elements from pre-defined list */
+  for (i=0; gem_count_list[i].element != EL_UNDEFINED; i++)
+    element_info[gem_count_list[i].element].gem_count =
+      gem_count_list[i].gem_count;
 }
 
-void Explode(int ex, int ey, int phase, int mode)
+
+/*
+  =============================================================================
+  InitGame()
+  -----------------------------------------------------------------------------
+  initialize and start new game
+  =============================================================================
+*/
+
+void InitGame()
 {
-  int x,y;
-  int num_phase = 9, delay = 2;
-  int last_phase = num_phase*delay;
-  int half_phase = (num_phase/2)*delay;
+  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, x, y;
 
-  if (phase==0)			/* Feld 'Store' initialisieren */
-  {
-    int center_element = Feld[ex][ey];
+  InitGameEngine();
 
-    if (IS_MOVING(ex,ey) || IS_BLOCKED(ex,ey))
-    {
-      center_element = MovingOrBlocked2Element(ex,ey);
-      RemoveMovingField(ex,ey);
-    }
+#if 0
+#if DEBUG
+#if USE_NEW_AMOEBA_CODE
+  printf("Using new amoeba code.\n");
+#else
+  printf("Using old amoeba code.\n");
+#endif
+#endif
+#endif
 
-    for(y=ey-1;y<ey+2;y++) for(x=ex-1;x<ex+2;x++)
-    {
-      int element = Feld[x][y];
+  /* don't play tapes over network */
+  network_playing = (options.network && !tape.playing);
 
-      if (IS_MOVING(x,y) || IS_BLOCKED(x,y))
-      {
-	element = MovingOrBlocked2Element(x,y);
-	RemoveMovingField(x,y);
-      }
+  for (i=0; i<MAX_PLAYERS; i++)
+  {
+    struct PlayerInfo *player = &stored_player[i];
 
-      if (!IN_LEV_FIELD(x,y) || IS_MASSIV(element) || element==EL_BURNING)
-	continue;
+    player->index_nr = i;
+    player->element_nr = EL_PLAYER_1 + i;
 
-      if ((mode!=EX_NORMAL || center_element==EL_AMOEBA2DIAM) &&
-	  (x!=ex || y!=ey))
-	continue;
+    player->present = FALSE;
+    player->active = FALSE;
 
-      if (element==EL_EXPLODING)
-	element = Store2[x][y];
+    player->action = 0;
+    player->effective_action = 0;
+    player->programmed_action = 0;
 
-      if (IS_PLAYER(ex,ey))
-	Store[x][y] = EL_EDELSTEIN_GELB;
-      else if (center_element==EL_MAULWURF)
-	Store[x][y] = EL_EDELSTEIN_ROT;
-      else if (center_element==EL_PINGUIN)
-	Store[x][y] = EL_EDELSTEIN_LILA;
-      else if (center_element==EL_KAEFER)
-	Store[x][y] = ((x==ex && y==ey) ? EL_DIAMANT : EL_EDELSTEIN);
-      else if (center_element==EL_BUTTERFLY)
-	Store[x][y] = EL_EDELSTEIN_BD;
-      else if (center_element==EL_MAMPFER)
-	Store[x][y] = level.mampfer_inhalt[MampferNr][x-ex+1][y-ey+1];
-      else if (center_element==EL_AMOEBA2DIAM)
-	Store[x][y] = level.amoebe_inhalt;
-      else if (element==EL_ERZ_EDEL)
-	Store[x][y] = EL_EDELSTEIN;
-      else if (element==EL_ERZ_DIAM)
-	Store[x][y] = EL_DIAMANT;
-      else if (element==EL_ERZ_EDEL_BD)
-	Store[x][y] = EL_EDELSTEIN_BD;
-      else if (element==EL_ERZ_EDEL_GELB)
-	Store[x][y] = EL_EDELSTEIN_GELB;
-      else if (element==EL_ERZ_EDEL_ROT)
-	Store[x][y] = EL_EDELSTEIN_ROT;
-      else if (element==EL_ERZ_EDEL_LILA)
-	Store[x][y] = EL_EDELSTEIN_LILA;
-      else if (!IS_PFORTE(Store[x][y]))
-	Store[x][y] = EL_LEERRAUM;
-
-      if (x!=ex || y!=ey || center_element==EL_AMOEBA2DIAM || mode==EX_BORDER)
-	Store2[x][y] = element;
+    player->score = 0;
+    player->gems_still_needed = level.gems_needed;
+    player->sokobanfields_still_needed = 0;
+    player->lights_still_needed = 0;
+    player->friends_still_needed = 0;
 
-      if (AmoebaNr[x][y] &&
-	  (element==EL_AMOEBE_VOLL ||
-	   element==EL_AMOEBE_BD ||
-	   element==EL_AMOEBING))
-      {
-	AmoebaCnt[AmoebaNr[x][y]]--;
-	AmoebaCnt2[AmoebaNr[x][y]]--;
-      }
+    for (j=0; j<4; j++)
+      player->key[j] = FALSE;
 
-      Feld[x][y] = EL_EXPLODING;
-      MovDir[x][y] = MovPos[x][y] = 0;
-      AmoebaNr[x][y] = 0;
-      Frame[x][y] = 1;
-      Stop[x][y] = TRUE;
-    }
+    player->dynamite = 0;
+    player->dynabomb_count = 0;
+    player->dynabomb_size = 1;
+    player->dynabombs_left = 0;
+    player->dynabomb_xl = FALSE;
 
-    if (center_element==EL_MAMPFER)
-      MampferNr = (MampferNr+1) % 4;
+    player->MovDir = MV_NO_MOVING;
+    player->MovPos = 0;
+    player->Pushing = FALSE;
+    player->Switching = FALSE;
+    player->GfxPos = 0;
+    player->GfxDir = MV_NO_MOVING;
+    player->GfxAction = ACTION_DEFAULT;
+    player->Frame = 0;
+    player->StepFrame = 0;
 
-    return;
-  }
+    player->use_murphy_graphic = FALSE;
+    player->use_disk_red_graphic = FALSE;
 
-  if (Stop[ex][ey])
-    return;
+    player->actual_frame_counter = 0;
 
-  x = ex;
-  y = ey;
+    player->last_move_dir = MV_NO_MOVING;
 
-  Frame[x][y] = (phase<last_phase ? phase+1 : 0);
+    player->is_moving = FALSE;
+    player->is_waiting = FALSE;
+    player->is_digging = FALSE;
+    player->is_collecting = FALSE;
 
-  if (phase==half_phase)
-  {
-    int element = Store2[x][y];
+    player->move_delay       = game.initial_move_delay;
+    player->move_delay_value = game.initial_move_delay_value;
 
-    if (IS_PLAYER(x,y))
-      KillHero();
-    else if (IS_EXPLOSIVE(element))
-    {
-      Feld[x][y] = Store2[x][y];
-      Store2[x][y] = 0;
-      Bang(x,y);
-    }
-    else if (element==EL_AMOEBA2DIAM)
-      AmoebeUmwandeln(x,y);
-  }
+    player->push_delay = 0;
+    player->push_delay_value = 5;
 
-  if (phase==last_phase)
-  {
-    int element;
+    player->snapped = FALSE;
 
-    element = Feld[x][y] = Store[x][y];
-    Store[x][y] = Store2[x][y] = 0;
-    MovDir[x][y] = MovPos[x][y] = MovDelay[x][y] = 0;
-    if (CAN_MOVE(element) || COULD_MOVE(element))
-      InitMovDir(x,y);
-    DrawLevelField(x,y);
-  }
-  else if (!(phase%delay) && IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-  {
-    if (phase==delay)
-      ErdreichAnbroeckeln(SCROLLX(x),SCROLLY(y));
+    player->last_jx = player->last_jy = 0;
+    player->jx = player->jy = 0;
 
-    DrawGraphic(SCROLLX(x),SCROLLY(y),GFX_EXPLOSION+(phase/delay-1));
-  }
-}
+    player->shield_normal_time_left = 0;
+    player->shield_deadly_time_left = 0;
 
-void DynaExplode(int ex, int ey, int size)
-{
-  int i,j;
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
+    DigField(player, 0, 0, 0, 0, DF_NO_PUSH);
+    SnapField(player, 0, 0);
 
-  Explode(ex,ey,0,EX_CENTER);
+    player->LevelSolved = FALSE;
+    player->GameOver = FALSE;
+  }
 
-  for(i=0;i<4;i++)
-  {
-    for(j=1;j<=size;j++)
-    {
-      int x = ex+j*xy[i%4][0];
-      int y = ey+j*xy[i%4][1];
-      int element;
+  network_player_action_received = FALSE;
 
-      if (!IN_LEV_FIELD(x,y) || IS_MASSIV(Feld[x][y]))
-	break;
+#if defined(PLATFORM_UNIX)
+  /* initial null action */
+  if (network_playing)
+    SendToServer_MovePlayer(MV_NO_MOVING);
+#endif
 
-      element = Feld[x][y];
-      Explode(x,y,0,EX_BORDER);
+  ZX = ZY = -1;
 
-      if (element != EL_LEERRAUM &&
-	  element != EL_ERDREICH &&
-	  element != EL_EXPLODING &&
-	  !DynaBombXL)
-	break;
-    }
-  }
+  FrameCounter = 0;
+  TimeFrames = 0;
+  TimePlayed = 0;
+  TimeLeft = level.time;
 
-  DynaBombsLeft++;
-}
+  ScreenMovDir = MV_NO_MOVING;
+  ScreenMovPos = 0;
+  ScreenGfxPos = 0;
 
-void Bang(int x, int y)
-{
-  int element = Feld[x][y];
+  ScrollStepSize = 0;	/* will be correctly initialized by ScrollScreen() */
 
-  PlaySoundLevel(x,y,SND_ROAAAR);
+  AllPlayersGone = FALSE;
 
-  switch(element)
+  game.yamyam_content_nr = 0;
+  game.magic_wall_active = FALSE;
+  game.magic_wall_time_left = 0;
+  game.light_time_left = 0;
+  game.timegate_time_left = 0;
+  game.switchgate_pos = 0;
+  game.balloon_dir = MV_NO_MOVING;
+  game.explosions_delayed = TRUE;
+
+  for (i=0; i<4; i++)
   {
-    case EL_KAEFER:
-    case EL_FLIEGER:
-    case EL_BUTTERFLY:
-    case EL_FIREFLY:
-    case EL_MAMPFER:
-    case EL_MAMPFER2:
-    case EL_ROBOT:
-    case EL_PACMAN:
-      RaiseScoreElement(element);
-      Explode(x,y,0,EX_NORMAL);
-      break;
-    case EL_DYNABOMB:
-    case EL_DYNABOMB_NR:
-    case EL_DYNABOMB_SZ:
-    case EL_DYNABOMB_XL:
-      DynaExplode(x,y,DynaBombSize);
-      break;
-    case EL_BIRNE_AUS:
-    case EL_BIRNE_EIN:
-      Explode(x,y,0,EX_CENTER);
-      break;
-    default:
-      Explode(x,y,0,EX_NORMAL);
-      break;
+    game.belt_dir[i] = MV_NO_MOVING;
+    game.belt_dir_nr[i] = 3;		/* not moving, next moving left */
   }
-}
 
-void Blurb(int x, int y)
-{
-  int element = Feld[x][y];
+  for (i=0; i<MAX_NUM_AMOEBA; i++)
+    AmoebaCnt[i] = AmoebaCnt2[i] = 0;
 
-  if (element!=EL_BLURB_LEFT && element!=EL_BLURB_RIGHT) /* Anfang */
+  for (x=0; x<lev_fieldx; x++)
   {
-    PlaySoundLevel(x,y,SND_BLURB);
-    if (IN_LEV_FIELD(x-1,y) && IS_FREE(x-1,y) &&
-	(!IN_LEV_FIELD(x-1,y-1) ||
-	 !CAN_FALL(MovingOrBlocked2Element(x-1,y-1))))
-    {
-      Feld[x-1][y] = EL_BLURB_LEFT;
-    }
-    if (IN_LEV_FIELD(x+1,y) && IS_FREE(x+1,y) &&
-	(!IN_LEV_FIELD(x+1,y-1) ||
-	 !CAN_FALL(MovingOrBlocked2Element(x+1,y-1))))
+    for (y=0; y<lev_fieldy; y++)
     {
-      Feld[x+1][y] = EL_BLURB_RIGHT;
+      Feld[x][y] = Ur[x][y];
+      MovPos[x][y] = MovDir[x][y] = MovDelay[x][y] = 0;
+      ChangeDelay[x][y] = 0;
+      Store[x][y] = Store2[x][y] = StorePlayer[x][y] = Back[x][y] = 0;
+      AmoebaNr[x][y] = 0;
+      JustStopped[x][y] = 0;
+      Stop[x][y] = FALSE;
+      Pushed[x][y] = FALSE;
+      ExplodePhase[x][y] = 0;
+      ExplodeField[x][y] = EX_NO_EXPLOSION;
+
+      GfxFrame[x][y] = 0;
+      GfxAction[x][y] = ACTION_DEFAULT;
+      GfxRandom[x][y] = INIT_GFX_RANDOM();
+      GfxElement[x][y] = EL_UNDEFINED;
     }
   }
-  else							 /* Blubbern */
-  {
-    int graphic = (element==EL_BLURB_LEFT ? GFX_BLURB_LEFT : GFX_BLURB_RIGHT);
-
-    if (!MovDelay[x][y])	/* neue Phase / noch nicht gewartet */
-      MovDelay[x][y] = 9;
 
-    if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  for(y=0; y<lev_fieldy; y++)
+  {
+    for(x=0; x<lev_fieldx; x++)
     {
-      MovDelay[x][y]--;
-      if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-	DrawGraphic(SCROLLX(x),SCROLLY(y),graphic+4-MovDelay[x][y]/2);
-
-      if (!MovDelay[x][y])
-      {
-	Feld[x][y] = EL_LEERRAUM;
-	DrawLevelField(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);
     }
   }
-}
 
-void Impact(int x, int y)
-{
-  BOOL lastline = (y==lev_fieldy-1);
-  BOOL object_hit = FALSE;
-  int element = Feld[x][y];
-  int smashed = 0;
+  InitBeltMovement();
 
-  /* Element darunter berührt? */
-  if (!lastline)
-  {
-    object_hit = (!IS_FREE(x,y+1) && (!IS_MOVING(x,y+1) ||
-				      MovDir[x][y+1]!=MV_DOWN ||
-				      MovPos[x][y+1]<=TILEY/2));
-    if (object_hit)
-      smashed = MovingOrBlocked2Element(x,y+1);
-  }
+  game.emulation = (emulate_bd ? EMU_BOULDERDASH :
+		    emulate_sb ? EMU_SOKOBAN :
+		    emulate_sp ? EMU_SUPAPLEX : EMU_NONE);
 
-  /* Auftreffendes Element fällt in Salzsäure */
-  if (!lastline && smashed==EL_SALZSAEURE)
-  {
-    Blurb(x,y);
-    return;
-  }
+  /* correct non-moving belts to start moving left */
+  for (i=0; i<4; i++)
+    if (game.belt_dir[i] == MV_NO_MOVING)
+      game.belt_dir_nr[i] = 3;		/* not moving, next moving left */
 
-  /* Auftreffendes Element ist Bombe */
-  if (element==EL_BOMBE && (lastline || object_hit))
+  /* check if any connected player was not found in playfield */
+  for (i=0; i<MAX_PLAYERS; i++)
   {
-    Bang(x,y);
-    return;
-  }
+    struct PlayerInfo *player = &stored_player[i];
 
-  /* Auftreffendes Element ist Säuretropfen */
-  if (element==EL_TROPFEN && (lastline || object_hit))
-  {
-    if (object_hit && IS_PLAYER(x,y+1))
-      KillHero();
-    else if (object_hit && (smashed==EL_MAULWURF || smashed==EL_PINGUIN))
-      Bang(x,y+1);
-    else
+    if (player->connected && !player->present)
     {
-      Feld[x][y] = EL_AMOEBING;
-      Store[x][y] = EL_AMOEBE_NASS;
+      for (j=0; j<MAX_PLAYERS; j++)
+      {
+	struct PlayerInfo *some_player = &stored_player[j];
+	int jx = some_player->jx, jy = some_player->jy;
+
+	/* assign first free player found that is present in the playfield */
+	if (some_player->present && !some_player->connected)
+	{
+	  player->present = TRUE;
+	  player->active = TRUE;
+	  some_player->present = FALSE;
+
+	  StorePlayer[jx][jy] = player->element_nr;
+	  player->jx = player->last_jx = jx;
+	  player->jy = player->last_jy = jy;
+
+	  break;
+	}
+      }
     }
-    return;
   }
 
-  /* Welches Element kriegt was auf die Rübe? */
-  if (!lastline && object_hit)
+  if (tape.playing)
   {
-    if (CAN_CHANGE(element) && 
-	(smashed==EL_SIEB_LEER || smashed==EL_SIEB2_LEER) && !SiebAktiv)
-      SiebAktiv = level.dauer_sieb * FRAMES_PER_SECOND;
+    /* when playing a tape, eliminate all players who do not participate */
 
-    if (IS_PLAYER(x,y+1))
-    {
-      KillHero();
-      return;
-    }
-    else if (smashed==EL_MAULWURF || smashed==EL_PINGUIN)
+    for (i=0; i<MAX_PLAYERS; i++)
     {
-      Bang(x,y+1);
-      return;
-    }
-    else if (element==EL_EDELSTEIN_BD)
-    {
-      if (IS_ENEMY(smashed) && IS_BD_ELEMENT(smashed))
+      if (stored_player[i].active && !tape.player_participates[i])
       {
-	Bang(x,y+1);
-	return;
+	struct PlayerInfo *player = &stored_player[i];
+	int jx = player->jx, jy = player->jy;
+
+	player->active = FALSE;
+	StorePlayer[jx][jy] = 0;
+	Feld[jx][jy] = EL_EMPTY;
       }
     }
-    else if (element==EL_FELSBROCKEN)
+  }
+  else if (!options.network && !setup.team_mode)	/* && !tape.playing */
+  {
+    /* when in single player mode, eliminate all but the first active player */
+
+    for (i=0; i<MAX_PLAYERS; i++)
     {
-      if (IS_ENEMY(smashed) || smashed==EL_BOMBE || smashed==EL_SONDE ||
-	  smashed==EL_SCHWEIN || smashed==EL_DRACHE)
+      if (stored_player[i].active)
       {
-	Bang(x,y+1);
-	return;
-      }
-      else if (!IS_MOVING(x,y+1))
-      {
-	if (smashed==EL_BIRNE_AUS || smashed==EL_BIRNE_EIN)
-	{
-	  Bang(x,y+1);
-	  return;
-	}
-	else if (smashed==EL_KOKOSNUSS)
-	{
-	  Feld[x][y+1] = EL_CRACKINGNUT;
-	  PlaySoundLevel(x,y,SND_KNACK);
-	  RaiseScoreElement(EL_KOKOSNUSS);
-	  return;
-	}
-	else if (smashed==EL_DIAMANT)
+	for (j=i+1; j<MAX_PLAYERS; j++)
 	{
-	  Feld[x][y+1] = EL_LEERRAUM;
-	  PlaySoundLevel(x,y,SND_QUIRK);
-	  return;
+	  if (stored_player[j].active)
+	  {
+	    struct PlayerInfo *player = &stored_player[j];
+	    int jx = player->jx, jy = player->jy;
+
+	    player->active = FALSE;
+	    StorePlayer[jx][jy] = 0;
+	    Feld[jx][jy] = EL_EMPTY;
+	  }
 	}
       }
     }
   }
 
-  /* Geräusch beim Durchqueren des Siebes */
-  if (!lastline && (Feld[x][y+1]==EL_SIEB_LEER || Feld[x][y+1]==EL_SIEB2_LEER))
+  /* when recording the game, store which players take part in the game */
+  if (tape.recording)
   {
-    PlaySoundLevel(x,y,SND_QUIRK);
-    return;
+    for (i=0; i<MAX_PLAYERS; i++)
+      if (stored_player[i].active)
+	tape.player_participates[i] = TRUE;
   }
 
-  /* Geräusch beim Auftreffen */
-  if (lastline || object_hit)
+  if (options.debug)
   {
-    int sound;
-
-    switch(element)
+    for (i=0; i<MAX_PLAYERS; i++)
     {
-      case EL_EDELSTEIN:
-      case EL_EDELSTEIN_BD:
-      case EL_EDELSTEIN_GELB:
-      case EL_EDELSTEIN_ROT:
-      case EL_EDELSTEIN_LILA:
-      case EL_DIAMANT:
-        sound = SND_PLING;
-	break;
-      case EL_KOKOSNUSS:
-	sound = SND_KLUMPF;
-	break;
-      case EL_FELSBROCKEN:
-	sound = SND_KLOPF;
-	break;
-      case EL_SCHLUESSEL:
-      case EL_SCHLUESSEL1:
-      case EL_SCHLUESSEL2:
-      case EL_SCHLUESSEL3:
-      case EL_SCHLUESSEL4:
-	sound = SND_KINK;
-	break;
-      case EL_ZEIT_VOLL:
-      case EL_ZEIT_LEER:
-	sound = SND_DENG;
-	break;
-      default:
-	sound = -1;
-        break;
+      struct PlayerInfo *player = &stored_player[i];
+
+      printf("Player %d: present == %d, connected == %d, active == %d.\n",
+	     i+1,
+	     player->present,
+	     player->connected,
+	     player->active);
+      if (local_player == player)
+	printf("Player 	%d is local player.\n", i+1);
     }
-
-    if (sound>=0)
-      PlaySoundLevel(x,y,sound);
   }
-}
 
-void TurnRound(int x, int y)
-{
-  static struct
-  {
-    int x,y;
-  } move_xy[] =
-  {
-    { 0,0 },
-    {-1,0 },
-    {+1,0 },
-    { 0,0 },
-    { 0,-1 },
-    { 0,0 }, { 0,0 }, { 0,0 },
-    { 0,+1 }
-  };
-  static struct
+  if (BorderElement == EL_EMPTY)
   {
-    int left,right,back;
-  } turn[] =
+    SBX_Left = 0;
+    SBX_Right = lev_fieldx - SCR_FIELDX;
+    SBY_Upper = 0;
+    SBY_Lower = lev_fieldy - SCR_FIELDY;
+  }
+  else
   {
-    { 0,	0,		0 },
-    { MV_DOWN,	MV_UP,		MV_RIGHT },
-    { MV_UP,	MV_DOWN,	MV_LEFT },
-    { 0,	0,		0 },
-    { MV_LEFT,	MV_RIGHT,	MV_DOWN },
-    { 0,0,0 },	{ 0,0,0 },	{ 0,0,0 },
-    { MV_RIGHT,	MV_LEFT,	MV_UP }
-  };
-
-  int element = Feld[x][y];
-  int old_move_dir = MovDir[x][y];
-  int left_dir = turn[old_move_dir].left;
-  int right_dir = turn[old_move_dir].right;
-  int back_dir = turn[old_move_dir].back;
+    SBX_Left = -1;
+    SBX_Right = lev_fieldx - SCR_FIELDX + 1;
+    SBY_Upper = -1;
+    SBY_Lower = lev_fieldy - SCR_FIELDY + 1;
+  }
 
-  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;
+  if (lev_fieldx + (SBX_Left == -1 ? 2 : 0) <= SCR_FIELDX)
+    SBX_Left = SBX_Right = -1 * (SCR_FIELDX - lev_fieldx) / 2;
 
-  int left_x = x+left_dx, left_y = y+left_dy;
-  int right_x = x+right_dx, right_y = y+right_dy;
-  int move_x = x+move_dx, move_y = y+move_dy;
+  if (lev_fieldy + (SBY_Upper == -1 ? 2 : 0) <= SCR_FIELDY)
+    SBY_Upper = SBY_Lower = -1 * (SCR_FIELDY - lev_fieldy) / 2;
 
-  if (element==EL_KAEFER || element==EL_BUTTERFLY)
-  {
-    TestIfBadThingHitsOtherBadThing(x,y);
+  scroll_x = SBX_Left;
+  scroll_y = SBY_Upper;
+  if (local_player->jx >= SBX_Left + MIDPOSX)
+    scroll_x = (local_player->jx <= SBX_Right + MIDPOSX ?
+		local_player->jx - MIDPOSX :
+		SBX_Right);
+  if (local_player->jy >= SBY_Upper + MIDPOSY)
+    scroll_y = (local_player->jy <= SBY_Lower + MIDPOSY ?
+		local_player->jy - MIDPOSY :
+		SBY_Lower);
 
-    if (IN_LEV_FIELD(right_x,right_y) &&
-	IS_FREE_OR_PLAYER(right_x,right_y))
-      MovDir[x][y] = right_dir;
-    else if (!IN_LEV_FIELD(move_x,move_y) ||
-	     !IS_FREE_OR_PLAYER(move_x,move_y))
-      MovDir[x][y] = left_dir;
+  CloseDoor(DOOR_CLOSE_1);
 
-    if (element==EL_KAEFER && MovDir[x][y] != old_move_dir)
-      MovDelay[x][y] = 9;
-    else if (element==EL_BUTTERFLY)	/* && MovDir[x][y]==left_dir) */
-      MovDelay[x][y] = 1;
-  }
-  else if (element==EL_FLIEGER || element==EL_FIREFLY)
-  {
-    TestIfBadThingHitsOtherBadThing(x,y);
+  DrawLevel();
+  DrawAllPlayers();
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	IS_FREE_OR_PLAYER(left_x,left_y))
-      MovDir[x][y] = left_dir;
-    else if (!IN_LEV_FIELD(move_x,move_y) ||
-	     !IS_FREE_OR_PLAYER(move_x,move_y))
-      MovDir[x][y] = right_dir;
+  /* after drawing the level, correct some elements */
+  if (game.timegate_time_left == 0)
+    CloseAllOpenTimegates();
 
-    if (element==EL_FLIEGER && MovDir[x][y] != old_move_dir)
-      MovDelay[x][y] = 9;
-    else if (element==EL_FIREFLY)	/* && MovDir[x][y]==right_dir) */
-      MovDelay[x][y] = 1;
-  }
-  else if (element==EL_MAMPFER)
-  {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE;
+  if (setup.soft_scrolling)
+    BlitBitmap(fieldbuffer, backbuffer, FX, FY, SXSIZE, SYSIZE, SX, SY);
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	(IS_FREE_OR_PLAYER(left_x,left_y) ||
-	 Feld[left_x][left_y] == EL_DIAMANT))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x,right_y) &&
-	(IS_FREE_OR_PLAYER(right_x,right_y) ||
-	 Feld[right_x][right_y] == EL_DIAMANT))
-      can_turn_right = TRUE;
+  redraw_mask |= REDRAW_FROM_BACKBUFFER;
+  FadeToFront();
 
-    if (can_turn_left && can_turn_right)
-      MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
-    else if (can_turn_left)
-      MovDir[x][y] = (RND(2) ? left_dir : back_dir);
-    else if (can_turn_right)
-      MovDir[x][y] = (RND(2) ? right_dir : back_dir);
-    else
-      MovDir[x][y] = back_dir;
+  /* copy default game door content to main double buffer */
+  BlitBitmap(graphic_info[IMG_GLOBAL_DOOR].bitmap, drawto,
+	     DOOR_GFX_PAGEX5, DOOR_GFX_PAGEY1, DXSIZE, DYSIZE, DX, DY);
 
-    MovDelay[x][y] = 16+16*RND(3);
-  }
-  else if (element==EL_MAMPFER2)
+  if (level_nr < 100)
+    DrawText(DX + XX_LEVEL, DY + YY_LEVEL, int2str(level_nr, 2), FONT_TEXT_2);
+  else
   {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE;
+    DrawTextExt(drawto, DX + XX_EMERALDS, DY + YY_EMERALDS,
+		int2str(level_nr, 3), FONT_LEVEL_NUMBER, BLIT_OPAQUE);
+    BlitBitmap(drawto, drawto,
+	       DX + XX_EMERALDS, DY + YY_EMERALDS + 1,
+	       getFontWidth(FONT_LEVEL_NUMBER) * 3,
+	       getFontHeight(FONT_LEVEL_NUMBER) - 1,
+	       DX + XX_LEVEL - 1, DY + YY_LEVEL + 1);
+  }
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	(IS_FREE_OR_PLAYER(left_x,left_y) ||
-	 IS_MAMPF2(Feld[left_x][left_y])))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x,right_y) &&
-	(IS_FREE_OR_PLAYER(right_x,right_y) ||
-	 IS_MAMPF2(Feld[right_x][right_y])))
-      can_turn_right = TRUE;
+  DrawGameDoorValues();
 
-    if (can_turn_left && can_turn_right)
-      MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
-    else if (can_turn_left)
-      MovDir[x][y] = (RND(2) ? left_dir : back_dir);
-    else if (can_turn_right)
-      MovDir[x][y] = (RND(2) ? right_dir : back_dir);
-    else
-      MovDir[x][y] = back_dir;
+  UnmapGameButtons();
+  UnmapTapeButtons();
+  game_gadget[SOUND_CTRL_ID_MUSIC]->checked = setup.sound_music;
+  game_gadget[SOUND_CTRL_ID_LOOPS]->checked = setup.sound_loops;
+  game_gadget[SOUND_CTRL_ID_SIMPLE]->checked = setup.sound_simple;
+  MapGameButtons();
+  MapTapeButtons();
 
-    MovDelay[x][y] = 16+16*RND(3);
-  }
-  else if (element==EL_PACMAN)
-  {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE;
+  /* copy actual game door content to door double buffer for OpenDoor() */
+  BlitBitmap(drawto, bitmap_db_door,
+	     DX, DY, DXSIZE, DYSIZE, DOOR_GFX_PAGEX1, DOOR_GFX_PAGEY1);
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	(IS_FREE_OR_PLAYER(left_x,left_y) ||
-	 IS_AMOEBOID(Feld[left_x][left_y])))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x,right_y) &&
-	(IS_FREE_OR_PLAYER(right_x,right_y) ||
-	 IS_AMOEBOID(Feld[right_x][right_y])))
-      can_turn_right = TRUE;
+  OpenDoor(DOOR_OPEN_ALL);
 
-    if (can_turn_left && can_turn_right)
-      MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
-    else if (can_turn_left)
-      MovDir[x][y] = (RND(2) ? left_dir : back_dir);
-    else if (can_turn_right)
-      MovDir[x][y] = (RND(2) ? right_dir : back_dir);
+  PlaySoundStereo(SND_GAME_STARTING, SOUND_MIDDLE);
+  if (setup.sound_music)
+    PlayMusic(level_nr);
+
+  KeyboardAutoRepeatOffUnlessAutoplay();
+
+  if (options.debug)
+  {
+    for (i=0; i<4; i++)
+      printf("Player %d %sactive.\n",
+	     i + 1, (stored_player[i].active ? "" : "not "));
+  }
+}
+
+void InitMovDir(int x, int y)
+{
+  int i, element = Feld[x][y];
+  static int xy[4][2] =
+  {
+    {  0, +1 },
+    { +1,  0 },
+    {  0, -1 },
+    { -1,  0 }
+  };
+  static int direction[3][4] =
+  {
+    { MV_RIGHT, MV_UP,   MV_LEFT,  MV_DOWN },
+    { MV_LEFT,  MV_DOWN, MV_RIGHT, MV_UP },
+    { MV_LEFT,  MV_RIGHT, MV_UP, MV_DOWN }
+  };
+
+  switch(element)
+  {
+    case EL_BUG_RIGHT:
+    case EL_BUG_UP:
+    case EL_BUG_LEFT:
+    case EL_BUG_DOWN:
+      Feld[x][y] = EL_BUG;
+      MovDir[x][y] = direction[0][element - EL_BUG_RIGHT];
+      break;
+
+    case EL_SPACESHIP_RIGHT:
+    case EL_SPACESHIP_UP:
+    case EL_SPACESHIP_LEFT:
+    case EL_SPACESHIP_DOWN:
+      Feld[x][y] = EL_SPACESHIP;
+      MovDir[x][y] = direction[0][element - EL_SPACESHIP_RIGHT];
+      break;
+
+    case EL_BD_BUTTERFLY_RIGHT:
+    case EL_BD_BUTTERFLY_UP:
+    case EL_BD_BUTTERFLY_LEFT:
+    case EL_BD_BUTTERFLY_DOWN:
+      Feld[x][y] = EL_BD_BUTTERFLY;
+      MovDir[x][y] = direction[0][element - EL_BD_BUTTERFLY_RIGHT];
+      break;
+
+    case EL_BD_FIREFLY_RIGHT:
+    case EL_BD_FIREFLY_UP:
+    case EL_BD_FIREFLY_LEFT:
+    case EL_BD_FIREFLY_DOWN:
+      Feld[x][y] = EL_BD_FIREFLY;
+      MovDir[x][y] = direction[0][element - EL_BD_FIREFLY_RIGHT];
+      break;
+
+    case EL_PACMAN_RIGHT:
+    case EL_PACMAN_UP:
+    case EL_PACMAN_LEFT:
+    case EL_PACMAN_DOWN:
+      Feld[x][y] = EL_PACMAN;
+      MovDir[x][y] = direction[0][element - EL_PACMAN_RIGHT];
+      break;
+
+    case EL_SP_SNIKSNAK:
+      MovDir[x][y] = MV_UP;
+      break;
+
+    case EL_SP_ELECTRON:
+      MovDir[x][y] = MV_LEFT;
+      break;
+
+    case EL_MOLE_LEFT:
+    case EL_MOLE_RIGHT:
+    case EL_MOLE_UP:
+    case EL_MOLE_DOWN:
+      Feld[x][y] = EL_MOLE;
+      MovDir[x][y] = direction[2][element - EL_MOLE_LEFT];
+      break;
+
+    default:
+      if (IS_CUSTOM_ELEMENT(element))
+      {
+	if (element_info[element].move_direction_initial != MV_NO_MOVING)
+	  MovDir[x][y] = element_info[element].move_direction_initial;
+	else if (element_info[element].move_pattern == MV_ALL_DIRECTIONS ||
+		 element_info[element].move_pattern == MV_TURNING_LEFT ||
+		 element_info[element].move_pattern == MV_TURNING_RIGHT)
+	  MovDir[x][y] = 1 << RND(4);
+	else if (element_info[element].move_pattern == MV_HORIZONTAL)
+	  MovDir[x][y] = (RND(2) ? MV_LEFT : MV_RIGHT);
+	else if (element_info[element].move_pattern == MV_VERTICAL)
+	  MovDir[x][y] = (RND(2) ? MV_UP : MV_DOWN);
+	else if (element_info[element].move_pattern & MV_ANY_DIRECTION)
+	  MovDir[x][y] = element_info[element].move_pattern;
+	else if (element_info[element].move_pattern == MV_ALONG_LEFT_SIDE ||
+		 element_info[element].move_pattern == MV_ALONG_RIGHT_SIDE)
+	{
+	  for (i=0; i<4; i++)
+	  {
+	    int x1 = x + xy[i][0];
+	    int y1 = y + xy[i][1];
+
+	    if (!IN_LEV_FIELD(x1, y1) || !IS_FREE(x1, y1))
+	    {
+	      if (element_info[element].move_pattern == MV_ALONG_RIGHT_SIDE)
+		MovDir[x][y] = direction[0][i];
+	      else
+		MovDir[x][y] = direction[1][i];
+
+	      break;
+	    }
+	  }
+	}		 
+      }
+      else
+      {
+	MovDir[x][y] = 1 << RND(4);
+
+	if (element != EL_BUG &&
+	    element != EL_SPACESHIP &&
+	    element != EL_BD_BUTTERFLY &&
+	    element != EL_BD_FIREFLY)
+	  break;
+
+	for (i=0; i<4; i++)
+	{
+	  int x1 = x + xy[i][0];
+	  int y1 = y + xy[i][1];
+
+	  if (!IN_LEV_FIELD(x1, y1) || !IS_FREE(x1, y1))
+	  {
+	    if (element == EL_BUG || element == EL_BD_BUTTERFLY)
+	    {
+	      MovDir[x][y] = direction[0][i];
+	      break;
+	    }
+	    else if (element == EL_SPACESHIP || element == EL_BD_FIREFLY ||
+		     element == EL_SP_SNIKSNAK || element == EL_SP_ELECTRON)
+	    {
+	      MovDir[x][y] = direction[1][i];
+	      break;
+	    }
+	  }
+	}
+      }
+      break;
+  }
+}
+
+void InitAmoebaNr(int x, int y)
+{
+  int i;
+  int group_nr = AmoebeNachbarNr(x, y);
+
+  if (group_nr == 0)
+  {
+    for (i=1; i<MAX_NUM_AMOEBA; i++)
+    {
+      if (AmoebaCnt[i] == 0)
+      {
+	group_nr = i;
+	break;
+      }
+    }
+  }
+
+  AmoebaNr[x][y] = group_nr;
+  AmoebaCnt[group_nr]++;
+  AmoebaCnt2[group_nr]++;
+}
+
+void GameWon()
+{
+  int hi_pos;
+  boolean raise_level = FALSE;
+
+  if (local_player->MovPos)
+    return;
+
+  if (tape.playing && tape.auto_play)
+    tape.auto_play_level_solved = TRUE;
+
+  local_player->LevelSolved = FALSE;
+
+  PlaySoundStereo(SND_GAME_WINNING, SOUND_MIDDLE);
+
+  if (TimeLeft)
+  {
+    if (!tape.playing && setup.sound_loops)
+      PlaySoundExt(SND_GAME_LEVELTIME_BONUS, SOUND_MAX_VOLUME, SOUND_MIDDLE,
+		   SND_CTRL_PLAY_LOOP);
+
+    while (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--;
+      DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FONT_TEXT_2);
+      BackToFront();
+
+      if (!tape.playing)
+	Delay(10);
+    }
+
+    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);
+
+    while (TimePlayed < 999)
+    {
+      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++;
+      DrawText(DX_TIME, DY_TIME, int2str(TimePlayed, 3), FONT_TEXT_2);
+      BackToFront();
+
+      if (!tape.playing)
+	Delay(10);
+    }
+
+    if (!tape.playing && setup.sound_loops)
+      StopSound(SND_GAME_LEVELTIME_BONUS);
+  }
+
+  /* Hero disappears */
+  DrawLevelField(ExitX, ExitY);
+  BackToFront();
+
+  if (tape.playing)
+    return;
+
+  CloseDoor(DOOR_CLOSE_1);
+
+  if (tape.recording)
+  {
+    TapeStop();
+    SaveTape(tape.level_nr);		/* Ask to save tape */
+  }
+
+  if (level_nr == leveldir_current->handicap_level)
+  {
+    leveldir_current->handicap_level++;
+    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 ((hi_pos = NewHiScore()) >= 0) 
+  {
+    game_status = GAME_MODE_SCORES;
+    DrawHallOfFame(hi_pos);
+    if (raise_level)
+    {
+      level_nr++;
+      TapeErase();
+    }
+  }
+  else
+  {
+    game_status = GAME_MODE_MAIN;
+    if (raise_level)
+    {
+      level_nr++;
+      TapeErase();
+    }
+    DrawMainMenu();
+  }
+
+  BackToFront();
+}
+
+int NewHiScore()
+{
+  int k, l;
+  int position = -1;
+
+  LoadScore(level_nr);
+
+  if (strcmp(setup.player_name, EMPTY_PLAYER_NAME) == 0 ||
+      local_player->score < highscore[MAX_SCORE_ENTRIES - 1].Score) 
+    return -1;
+
+  for (k=0; k<MAX_SCORE_ENTRIES; k++) 
+  {
+    if (local_player->score > highscore[k].Score)
+    {
+      /* player has made it to the hall of fame */
+
+      if (k < MAX_SCORE_ENTRIES - 1)
+      {
+	int m = MAX_SCORE_ENTRIES - 1;
+
+#ifdef ONE_PER_NAME
+	for (l=k; l<MAX_SCORE_ENTRIES; l++)
+	  if (!strcmp(setup.player_name, highscore[l].Name))
+	    m = l;
+	if (m == k)	/* player's new highscore overwrites his old one */
+	  goto put_into_list;
+#endif
+
+	for (l=m; l>k; l--)
+	{
+	  strcpy(highscore[l].Name, highscore[l - 1].Name);
+	  highscore[l].Score = highscore[l - 1].Score;
+	}
+      }
+
+#ifdef ONE_PER_NAME
+      put_into_list:
+#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; 
+      position = k;
+      break;
+    }
+
+#ifdef ONE_PER_NAME
+    else if (!strncmp(setup.player_name, highscore[k].Name,
+		      MAX_PLAYER_NAME_LEN))
+      break;	/* player already there with a higher score */
+#endif
+
+  }
+
+  if (position >= 0) 
+    SaveScore(level_nr);
+
+  return position;
+}
+
+void InitPlayerGfxAnimation(struct PlayerInfo *player, int action, int dir)
+{
+  if (player->GfxAction != action || player->GfxDir != dir)
+  {
+#if 0
+    printf("Player frame reset! (%d => %d, %d => %d)\n",
+	   player->GfxAction, action, player->GfxDir, dir);
+#endif
+
+    player->GfxAction = action;
+    player->GfxDir = dir;
+    player->Frame = 0;
+    player->StepFrame = 0;
+  }
+}
+
+static void ResetRandomAnimationValue(int x, int y)
+{
+  GfxRandom[x][y] = INIT_GFX_RANDOM();
+}
+
+static void ResetGfxAnimation(int x, int y)
+{
+  GfxFrame[x][y] = 0;
+  GfxAction[x][y] = ACTION_DEFAULT;
+}
+
+void InitMovingField(int x, int y, int direction)
+{
+  int element = Feld[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;
+  int newy = y + dy;
+
+  if (!JustStopped[x][y] || direction != MovDir[x][y])
+    ResetGfxAnimation(x, y);
+
+  MovDir[newx][newy] = MovDir[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];
+  GfxAction[newx][newy] = GfxAction[x][y];
+  GfxRandom[newx][newy] = GfxRandom[x][y];
+}
+
+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);
+
+  *goes_to_x = newx;
+  *goes_to_y = newy;
+}
+
+void Blocked2Moving(int x, int y, int *comes_from_x, int *comes_from_y)
+{
+  int oldx = x, oldy = y;
+  int direction = MovDir[x][y];
+
+  if (direction == MV_LEFT)
+    oldx++;
+  else if (direction == MV_RIGHT)
+    oldx--;
+  else if (direction == MV_UP)
+    oldy++;
+  else if (direction == MV_DOWN)
+    oldy--;
+
+  *comes_from_x = oldx;
+  *comes_from_y = oldy;
+}
+
+int MovingOrBlocked2Element(int x, int y)
+{
+  int element = Feld[x][y];
+
+  if (element == EL_BLOCKED)
+  {
+    int oldx, oldy;
+
+    Blocked2Moving(x, y, &oldx, &oldy);
+    return Feld[oldx][oldy];
+  }
+  else
+    return element;
+}
+
+static int MovingOrBlocked2ElementIfNotLeaving(int x, int y)
+{
+  /* like MovingOrBlocked2Element(), but if element is moving
+     and (x,y) is the field the moving element is just leaving,
+     return EL_BLOCKED instead of the element value */
+  int element = Feld[x][y];
+
+  if (IS_MOVING(x, y))
+  {
+    if (element == EL_BLOCKED)
+    {
+      int oldx, oldy;
+
+      Blocked2Moving(x, y, &oldx, &oldy);
+      return Feld[oldx][oldy];
+    }
     else
-      MovDir[x][y] = back_dir;
+      return EL_BLOCKED;
+  }
+  else
+    return element;
+}
+
+static void RemoveField(int x, int y)
+{
+  Feld[x][y] = EL_EMPTY;
+
+  MovPos[x][y] = 0;
+  MovDir[x][y] = 0;
+  MovDelay[x][y] = 0;
+
+  AmoebaNr[x][y] = 0;
+  ChangeDelay[x][y] = 0;
+  Pushed[x][y] = FALSE;
+
+  GfxElement[x][y] = EL_UNDEFINED;
+  GfxAction[x][y] = ACTION_DEFAULT;
+}
+
+void RemoveMovingField(int x, int y)
+{
+  int oldx = x, oldy = y, newx = x, newy = y;
+  int element = Feld[x][y];
+  int next_element = EL_UNDEFINED;
+
+  if (element != EL_BLOCKED && !IS_MOVING(x, y))
+    return;
+
+  if (IS_MOVING(x, y))
+  {
+    Moving2Blocked(x, y, &newx, &newy);
+    if (Feld[newx][newy] != EL_BLOCKED)
+      return;
+  }
+  else if (element == EL_BLOCKED)
+  {
+    Blocked2Moving(x, y, &oldx, &oldy);
+    if (!IS_MOVING(oldx, oldy))
+      return;
+  }
+
+  if (element == EL_BLOCKED &&
+      (Feld[oldx][oldy] == EL_QUICKSAND_EMPTYING ||
+       Feld[oldx][oldy] == EL_MAGIC_WALL_EMPTYING ||
+       Feld[oldx][oldy] == EL_BD_MAGIC_WALL_EMPTYING ||
+       Feld[oldx][oldy] == EL_AMOEBA_DROPPING))
+    next_element = get_next_element(Feld[oldx][oldy]);
+
+  RemoveField(oldx, oldy);
+  RemoveField(newx, newy);
+
+  Store[oldx][oldy] = Store2[oldx][oldy] = 0;
+
+  if (next_element != EL_UNDEFINED)
+    Feld[oldx][oldy] = next_element;
+
+  DrawLevelField(oldx, oldy);
+  DrawLevelField(newx, newy);
+}
+
+void DrawDynamite(int x, int y)
+{
+  int sx = SCREENX(x), sy = SCREENY(y);
+  int graphic = el2img(Feld[x][y]);
+  int frame;
+
+  if (!IN_SCR_FIELD(sx, sy) || IS_PLAYER(x, y))
+    return;
+
+  if (IS_WALKABLE_INSIDE(Back[x][y]))
+    return;
+
+  if (Back[x][y])
+    DrawGraphic(sx, sy, el2img(Back[x][y]), 0);
+  else if (Store[x][y])
+    DrawGraphic(sx, sy, el2img(Store[x][y]), 0);
+
+  frame = getGraphicAnimationFrame(graphic, GfxFrame[x][y]);
+
+#if 1
+  if (Back[x][y] || Store[x][y])
+    DrawGraphicThruMask(sx, sy, graphic, frame);
+  else
+    DrawGraphic(sx, sy, graphic, frame);
+#else
+  if (game.emulation == EMU_SUPAPLEX)
+    DrawGraphic(sx, sy, IMG_SP_DISK_RED, frame);
+  else if (Store[x][y])
+    DrawGraphicThruMask(sx, sy, graphic, frame);
+  else
+    DrawGraphic(sx, sy, graphic, frame);
+#endif
+}
+
+void CheckDynamite(int x, int y)
+{
+  if (MovDelay[x][y] != 0)	/* dynamite is still waiting to explode */
+  {
+    MovDelay[x][y]--;
+
+    if (MovDelay[x][y] != 0)
+    {
+      DrawDynamite(x, y);
+      PlaySoundLevelActionIfLoop(x, y, ACTION_ACTIVE);
+
+      return;
+    }
+  }
+
+#if 1
+  StopSoundLevelActionIfLoop(x, y, ACTION_ACTIVE);
+#else
+  if (Feld[x][y] == EL_DYNAMITE_ACTIVE ||
+      Feld[x][y] == EL_SP_DISK_RED_ACTIVE)
+    StopSound(SND_DYNAMITE_ACTIVE);
+  else
+    StopSound(SND_DYNABOMB_ACTIVE);
+#endif
+
+  Bang(x, y);
+}
+
+void Explode(int ex, int ey, int phase, int mode)
+{
+  int x, y;
+  int num_phase = 9;
+  int delay = (game.emulation == EMU_SUPAPLEX ? 3 : 2);
+  int last_phase = num_phase * delay;
+  int half_phase = (num_phase / 2) * delay;
+  int first_phase_after_start = EX_PHASE_START + 1;
+
+  if (game.explosions_delayed)
+  {
+    ExplodeField[ex][ey] = mode;
+    return;
+  }
+
+  if (phase == EX_PHASE_START)		/* initialize 'Store[][]' field */
+  {
+    int center_element = Feld[ex][ey];
+
+    /* remove things displayed in background while burning dynamite */
+    if (!IS_INDESTRUCTIBLE(Back[ex][ey]))
+      Back[ex][ey] = 0;
+
+    if (IS_MOVING(ex, ey) || IS_BLOCKED(ex, ey))
+    {
+      /* put moving element to center field (and let it explode there) */
+      center_element = MovingOrBlocked2Element(ex, ey);
+      RemoveMovingField(ex, ey);
+      Feld[ex][ey] = center_element;
+    }
+
+    for (y = ey - 1; y <= ey + 1; y++) for(x = ex - 1; x <= ex + 1; x++)
+    {
+      int element;
+
+      if (!IN_LEV_FIELD(x, y) ||
+	  ((mode != EX_NORMAL || center_element == EL_AMOEBA_TO_DIAMOND) &&
+	   (x != ex || y != ey)))
+	continue;
+
+      element = Feld[x][y];
+
+      if (IS_MOVING(x, y) || IS_BLOCKED(x, y))
+      {
+	element = MovingOrBlocked2Element(x, y);
+	RemoveMovingField(x, y);
+      }
+
+#if 1
+      if (IS_EXPLOSION_PROOF(element))
+	continue;
+#else
+      if ((IS_INDESTRUCTIBLE(element) &&
+	   (game.engine_version < VERSION_IDENT(2,2,0) ||
+	    (!IS_WALKABLE_OVER(element) && !IS_WALKABLE_UNDER(element)))) ||
+	  element == EL_FLAMES)
+	continue;
+#endif
+
+      if (IS_PLAYER(x, y) && SHIELD_ON(PLAYERINFO(x, y)))
+      {
+	if (IS_ACTIVE_BOMB(element))
+	{
+	  /* re-activate things under the bomb like gate or penguin */
+	  Feld[x][y] = (Store[x][y] ? Store[x][y] : EL_EMPTY);
+	  Store[x][y] = 0;
+	}
+
+	continue;
+      }
+
+      /* save walkable background elements while explosion on same tile */
+      if (IS_INDESTRUCTIBLE(element))
+	Back[x][y] = element;
+
+      /* ignite explodable elements reached by other explosion */
+      if (element == EL_EXPLOSION)
+	element = Store2[x][y];
+
+#if 1
+      if (AmoebaNr[x][y] &&
+	  (element == EL_AMOEBA_FULL ||
+	   element == EL_BD_AMOEBA ||
+	   element == EL_AMOEBA_GROWING))
+      {
+	AmoebaCnt[AmoebaNr[x][y]]--;
+	AmoebaCnt2[AmoebaNr[x][y]]--;
+      }
+
+      RemoveField(x, y);
+#endif
+
+      if (IS_PLAYER(ex, ey) && !PLAYER_PROTECTED(ex, ey))
+      {
+	switch(StorePlayer[ex][ey])
+	{
+	  case EL_PLAYER_2:
+	    Store[x][y] = EL_EMERALD_RED;
+	    break;
+	  case EL_PLAYER_3:
+	    Store[x][y] = EL_EMERALD;
+	    break;
+	  case EL_PLAYER_4:
+	    Store[x][y] = EL_EMERALD_PURPLE;
+	    break;
+	  case EL_PLAYER_1:
+	  default:
+	    Store[x][y] = EL_EMERALD_YELLOW;
+	    break;
+	}
+
+	if (game.emulation == EMU_SUPAPLEX)
+	  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;
+      else if (center_element == EL_YAMYAM)
+	Store[x][y] =
+	  level.yamyam_content[game.yamyam_content_nr][x - ex + 1][y - ey + 1];
+      else if (IS_CUSTOM_ELEMENT(center_element))
+	Store[x][y] =
+	  element_info[center_element].content[x - ex + 1][y - ey + 1];
+      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
+	Store[x][y] = EL_EMPTY;
+
+      if (x != ex || y != ey ||
+	  center_element == EL_AMOEBA_TO_DIAMOND || mode == EX_BORDER)
+	Store2[x][y] = element;
+
+#if 0
+      if (AmoebaNr[x][y] &&
+	  (element == EL_AMOEBA_FULL ||
+	   element == EL_BD_AMOEBA ||
+	   element == EL_AMOEBA_GROWING))
+      {
+	AmoebaCnt[AmoebaNr[x][y]]--;
+	AmoebaCnt2[AmoebaNr[x][y]]--;
+      }
+
+#if 1
+      RemoveField(x, y);
+#else
+      MovDir[x][y] = MovPos[x][y] = 0;
+      AmoebaNr[x][y] = 0;
+#endif
+#endif
+
+      Feld[x][y] = EL_EXPLOSION;
+#if 1
+      GfxElement[x][y] = center_element;
+#else
+      GfxElement[x][y] = EL_UNDEFINED;
+#endif
+
+      ExplodePhase[x][y] = 1;
+      Stop[x][y] = TRUE;
+    }
+
+    if (center_element == EL_YAMYAM)
+      game.yamyam_content_nr =
+	(game.yamyam_content_nr + 1) % level.num_yamyam_contents;
+
+    return;
+  }
+
+  if (Stop[ex][ey])
+    return;
+
+  x = ex;
+  y = ey;
+
+  ExplodePhase[x][y] = (phase < last_phase ? phase + 1 : 0);
+
+  if (phase == first_phase_after_start)
+  {
+    int element = Store2[x][y];
+
+    if (element == EL_BLACK_ORB)
+    {
+      Feld[x][y] = Store2[x][y];
+      Store2[x][y] = 0;
+      Bang(x, y);
+    }
+  }
+  else if (phase == half_phase)
+  {
+    int element = Store2[x][y];
+
+    if (IS_PLAYER(x, y))
+      KillHeroUnlessProtected(x, y);
+    else if (CAN_EXPLODE_BY_FIRE(element))
+    {
+      Feld[x][y] = Store2[x][y];
+      Store2[x][y] = 0;
+      Bang(x, y);
+    }
+    else if (element == EL_AMOEBA_TO_DIAMOND)
+      AmoebeUmwandeln(x, y);
+  }
+
+  if (phase == last_phase)
+  {
+    int element;
+
+    element = Feld[x][y] = Store[x][y];
+    Store[x][y] = Store2[x][y] = 0;
+    GfxElement[x][y] = EL_UNDEFINED;
+
+    if (Back[x][y] && IS_INDESTRUCTIBLE(Back[x][y]))
+      element = Feld[x][y] = Back[x][y];
+    Back[x][y] = 0;
+
+    MovDir[x][y] = MovPos[x][y] = MovDelay[x][y] = ChangeDelay[x][y] = 0;
+    InitField(x, y, FALSE);
+    if (CAN_MOVE(element))
+      InitMovDir(x, y);
+    DrawLevelField(x, y);
+
+    if (IS_PLAYER(x, y) && !PLAYERINFO(x,y)->present)
+      StorePlayer[x][y] = 0;
+  }
+  else if (phase >= delay && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+  {
+#if 1
+    int graphic = el_act2img(GfxElement[x][y], ACTION_EXPLODING);
+#else
+    int stored = Store[x][y];
+    int graphic = (game.emulation != EMU_SUPAPLEX ? IMG_EXPLOSION :
+		   stored == EL_SP_INFOTRON ? IMG_SP_EXPLOSION_INFOTRON :
+		   IMG_SP_EXPLOSION);
+#endif
+    int frame = getGraphicAnimationFrame(graphic, phase - delay);
+
+    if (phase == delay)
+      DrawLevelFieldCrumbledSand(x, y);
+
+    if (IS_WALKABLE_OVER(Back[x][y]) && Back[x][y] != EL_EMPTY)
+    {
+      DrawLevelElement(x, y, Back[x][y]);
+      DrawGraphicThruMask(SCREENX(x), SCREENY(y), graphic, frame);
+    }
+    else if (IS_WALKABLE_UNDER(Back[x][y]))
+    {
+      DrawGraphic(SCREENX(x), SCREENY(y), graphic, frame);
+      DrawLevelElementThruMask(x, y, Back[x][y]);
+    }
+    else if (!IS_WALKABLE_INSIDE(Back[x][y]))
+      DrawGraphic(SCREENX(x), SCREENY(y), graphic, frame);
+  }
+}
+
+void DynaExplode(int ex, int ey)
+{
+  int i, j;
+  int dynabomb_size = 1;
+  boolean dynabomb_xl = FALSE;
+  struct PlayerInfo *player;
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+
+  if (IS_ACTIVE_BOMB(Feld[ex][ey]))
+  {
+    player = &stored_player[Feld[ex][ey] - EL_DYNABOMB_PLAYER_1_ACTIVE];
+    dynabomb_size = player->dynabomb_size;
+    dynabomb_xl = player->dynabomb_xl;
+    player->dynabombs_left++;
+  }
+
+  Explode(ex, ey, EX_PHASE_START, EX_CENTER);
+
+  for (i=0; i<4; i++)
+  {
+    for (j=1; j<=dynabomb_size; j++)
+    {
+      int x = ex + j * xy[i % 4][0];
+      int y = ey + j * xy[i % 4][1];
+      int element;
+
+      if (!IN_LEV_FIELD(x, y) || IS_INDESTRUCTIBLE(Feld[x][y]))
+	break;
+
+      element = Feld[x][y];
+
+      /* do not restart explosions of fields with active bombs */
+      if (element == EL_EXPLOSION && IS_ACTIVE_BOMB(Store2[x][y]))
+	continue;
+
+      Explode(x, y, EX_PHASE_START, EX_BORDER);
+
+      if (element != EL_EMPTY &&
+	  element != EL_SAND &&
+	  element != EL_EXPLOSION &&
+	  !dynabomb_xl)
+	break;
+    }
+  }
+}
+
+void Bang(int x, int y)
+{
+#if 1
+  int element = MovingOrBlocked2Element(x, y);
+#else
+  int element = Feld[x][y];
+#endif
+
+  if (IS_PLAYER(x, y))
+  {
+    struct PlayerInfo *player = PLAYERINFO(x, y);
+
+    element = Feld[x][y] = (player->use_murphy_graphic ? EL_SP_MURPHY :
+			    player->element_nr);
+  }
+
+#if 1
+  PlaySoundLevelAction(x, y, ACTION_EXPLODING);
+#else
+  if (game.emulation == EMU_SUPAPLEX)
+    PlaySoundLevel(x, y, SND_SP_ELEMENT_EXPLODING);
+  else
+    PlaySoundLevel(x, y, SND_ELEMENT_EXPLODING);
+#endif
+
+#if 0
+  if (IS_PLAYER(x, y))	/* remove objects that might cause smaller explosion */
+    element = EL_EMPTY;
+#endif
+
+  switch(element)
+  {
+    case EL_BUG:
+    case EL_SPACESHIP:
+    case EL_BD_BUTTERFLY:
+    case EL_BD_FIREFLY:
+    case EL_YAMYAM:
+    case EL_DARK_YAMYAM:
+    case EL_ROBOT:
+    case EL_PACMAN:
+    case EL_MOLE:
+      RaiseScoreElement(element);
+      Explode(x, y, EX_PHASE_START, EX_NORMAL);
+      break;
+    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_DYNABOMB_INCREASE_NUMBER:
+    case EL_DYNABOMB_INCREASE_SIZE:
+    case EL_DYNABOMB_INCREASE_POWER:
+      DynaExplode(x, y);
+      break;
+    case EL_PENGUIN:
+    case EL_LAMP:
+    case EL_LAMP_ACTIVE:
+      if (IS_PLAYER(x, y))
+	Explode(x, y, EX_PHASE_START, EX_NORMAL);
+      else
+	Explode(x, y, EX_PHASE_START, EX_CENTER);
+      break;
+    default:
+      Explode(x, y, EX_PHASE_START, EX_NORMAL);
+      break;
+  }
+
+  CheckTriggeredElementChange(x, y, element, CE_OTHER_IS_EXPLODING);
+}
+
+void SplashAcid(int x, int y)
+{
+  int element = Feld[x][y];
+
+  if (element != EL_ACID_SPLASH_LEFT &&
+      element != EL_ACID_SPLASH_RIGHT)
+  {
+    PlaySoundLevel(x, y, SND_ACID_SPLASHING);
+
+    if (IN_LEV_FIELD(x-1, y) && IS_FREE(x-1, y) &&
+	(!IN_LEV_FIELD(x-1, y-1) ||
+	 !CAN_FALL(MovingOrBlocked2Element(x-1, y-1))))
+      Feld[x-1][y] = EL_ACID_SPLASH_LEFT;
+
+    if (IN_LEV_FIELD(x+1, y) && IS_FREE(x+1, y) &&
+	(!IN_LEV_FIELD(x+1, y-1) ||
+	 !CAN_FALL(MovingOrBlocked2Element(x+1, y-1))))
+      Feld[x+1][y] = EL_ACID_SPLASH_RIGHT;
+  }
+}
+
+static void InitBeltMovement()
+{
+  static int belt_base_element[4] =
+  {
+    EL_CONVEYOR_BELT_1_LEFT,
+    EL_CONVEYOR_BELT_2_LEFT,
+    EL_CONVEYOR_BELT_3_LEFT,
+    EL_CONVEYOR_BELT_4_LEFT
+  };
+  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 x, y, i, j;
+
+  /* set frame order for belt animation graphic according to belt direction */
+  for (i=0; i<4; i++)
+  {
+    int belt_nr = i;
+
+    for (j=0; j<3; j++)
+    {
+      int element = belt_base_active_element[belt_nr] + j;
+      int graphic = el2img(element);
+
+      if (game.belt_dir[i] == MV_LEFT)
+	graphic_info[graphic].anim_mode &= ~ANIM_REVERSE;
+      else
+	graphic_info[graphic].anim_mode |=  ANIM_REVERSE;
+    }
+  }
+
+  for(y=0; y<lev_fieldy; y++)
+  {
+    for(x=0; x<lev_fieldx; x++)
+    {
+      int element = Feld[x][y];
+
+      for (i=0; i<4; i++)
+      {
+	if (IS_BELT(element) && game.belt_dir[i] != MV_NO_MOVING)
+	{
+	  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];
+
+	    Feld[x][y] = belt_base_active_element[belt_nr] + belt_part;
+	  }
+	}
+      }
+    }
+  }
+}
+
+static void ToggleBeltSwitch(int x, int y)
+{
+  static int belt_base_element[4] =
+  {
+    EL_CONVEYOR_BELT_1_LEFT,
+    EL_CONVEYOR_BELT_2_LEFT,
+    EL_CONVEYOR_BELT_3_LEFT,
+    EL_CONVEYOR_BELT_4_LEFT
+  };
+  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
+  };
+  static int belt_base_switch_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
+  };
+  static int belt_move_dir[4] =
+  {
+    MV_LEFT,
+    MV_NO_MOVING,
+    MV_RIGHT,
+    MV_NO_MOVING,
+  };
+
+  int element = Feld[x][y];
+  int belt_nr = getBeltNrFromBeltSwitchElement(element);
+  int belt_dir_nr = (game.belt_dir_nr[belt_nr] + 1) % 4;
+  int belt_dir = belt_move_dir[belt_dir_nr];
+  int xx, yy, i;
+
+  if (!IS_BELT_SWITCH(element))
+    return;
+
+  game.belt_dir_nr[belt_nr] = belt_dir_nr;
+  game.belt_dir[belt_nr] = belt_dir;
+
+  if (belt_dir_nr == 3)
+    belt_dir_nr = 1;
+
+  /* set frame order for belt animation graphic according to belt direction */
+  for (i=0; i<3; i++)
+  {
+    int element = belt_base_active_element[belt_nr] + i;
+    int graphic = el2img(element);
+
+    if (belt_dir == MV_LEFT)
+      graphic_info[graphic].anim_mode &= ~ANIM_REVERSE;
+    else
+      graphic_info[graphic].anim_mode |=  ANIM_REVERSE;
+  }
+
+  for (yy=0; yy<lev_fieldy; yy++)
+  {
+    for (xx=0; xx<lev_fieldx; xx++)
+    {
+      int element = Feld[xx][yy];
+
+      if (IS_BELT_SWITCH(element))
+      {
+	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);
+	}
+      }
+      else if (IS_BELT(element) && belt_dir != MV_NO_MOVING)
+      {
+	int e_belt_nr = getBeltNrFromBeltElement(element);
+
+	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);
+	}
+      }
+      else if (IS_BELT_ACTIVE(element) && belt_dir == MV_NO_MOVING)
+      {
+	int e_belt_nr = getBeltNrFromBeltActiveElement(element);
+
+	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);
+	}
+      }
+    }
+  }
+}
+
+static void ToggleSwitchgateSwitch(int x, int y)
+{
+  int xx, yy;
+
+  game.switchgate_pos = !game.switchgate_pos;
+
+  for (yy=0; yy<lev_fieldy; yy++)
+  {
+    for (xx=0; xx<lev_fieldx; xx++)
+    {
+      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 1
+	PlaySoundLevelAction(xx, yy, ACTION_CLOSING);
+#else
+	PlaySoundLevel(xx, yy, SND_SWITCHGATE_CLOSING);
+#endif
+      }
+      else if (element == EL_SWITCHGATE_CLOSED ||
+	       element == EL_SWITCHGATE_CLOSING)
+      {
+	Feld[xx][yy] = EL_SWITCHGATE_OPENING;
+#if 1
+	PlaySoundLevelAction(xx, yy, ACTION_OPENING);
+#else
+	PlaySoundLevel(xx, yy, SND_SWITCHGATE_OPENING);
+#endif
+      }
+    }
+  }
+}
+
+static int getInvisibleActiveFromInvisibleElement(int element)
+{
+  return (element == EL_INVISIBLE_STEELWALL ? EL_INVISIBLE_STEELWALL_ACTIVE :
+	  element == EL_INVISIBLE_WALL      ? EL_INVISIBLE_WALL_ACTIVE :
+	  EL_INVISIBLE_SAND_ACTIVE);
+}
+
+static int getInvisibleFromInvisibleActiveElement(int element)
+{
+  return (element == EL_INVISIBLE_STEELWALL_ACTIVE ? EL_INVISIBLE_STEELWALL :
+	  element == EL_INVISIBLE_WALL_ACTIVE      ? EL_INVISIBLE_WALL :
+	  EL_INVISIBLE_SAND);
+}
+
+static void RedrawAllLightSwitchesAndInvisibleElements()
+{
+  int x, y;
+
+  for (y=0; y<lev_fieldy; y++)
+  {
+    for (x=0; x<lev_fieldx; x++)
+    {
+      int element = Feld[x][y];
+
+      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);
+      }
+      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);
+      }
+    }
+  }
+}
+
+static void ToggleLightSwitch(int x, int y)
+{
+  int element = Feld[x][y];
+
+  game.light_time_left =
+    (element == EL_LIGHT_SWITCH ?
+     level.time_light * FRAMES_PER_SECOND : 0);
+
+  RedrawAllLightSwitchesAndInvisibleElements();
+}
+
+static void ActivateTimegateSwitch(int x, int y)
+{
+  int xx, yy;
+
+  game.timegate_time_left = level.time_timegate * FRAMES_PER_SECOND;
+
+  for (yy=0; yy<lev_fieldy; 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;
+	PlaySoundLevel(xx, yy, SND_TIMEGATE_OPENING);
+      }
+
+      /*
+      else if (element == EL_TIMEGATE_SWITCH_ACTIVE)
+      {
+	Feld[xx][yy] = EL_TIMEGATE_SWITCH;
+	DrawLevelField(xx, yy);
+      }
+      */
+
+    }
+  }
+
+  Feld[x][y] = EL_TIMEGATE_SWITCH_ACTIVE;
+}
+
+void Impact(int x, int y)
+{
+  boolean lastline = (y == lev_fieldy-1);
+  boolean object_hit = FALSE;
+  boolean impact = (lastline || object_hit);
+  int element = Feld[x][y];
+  int smashed = EL_UNDEFINED;
+
+  if (!lastline)	/* check if element below was hit */
+  {
+    if (Feld[x][y + 1] == EL_PLAYER_IS_LEAVING)
+      return;
+
+    object_hit = (!IS_FREE(x, y + 1) && (!IS_MOVING(x, y + 1) ||
+					 MovDir[x][y + 1] != MV_DOWN ||
+					 MovPos[x][y + 1] <= TILEY / 2));
+    if (object_hit)
+      smashed = MovingOrBlocked2Element(x, y + 1);
+
+    impact = (lastline || object_hit);
+  }
+
+  if (!lastline && smashed == EL_ACID)	/* element falls into acid */
+  {
+    SplashAcid(x, y);
+    return;
+  }
+
+  if (impact)
+  {
+    ResetGfxAnimation(x, y);
+    DrawLevelField(x, y);
+  }
+
+  if (impact && CAN_EXPLODE_IMPACT(element))
+  {
+    Bang(x, y);
+    return;
+  }
+  else if (impact && element == EL_PEARL)
+  {
+    Feld[x][y] = EL_PEARL_BREAKING;
+    PlaySoundLevel(x, y, SND_PEARL_BREAKING);
+    return;
+  }
+#if 1
+  else if (impact && CheckElementChange(x, y, element, ACTION_IMPACT))
+  {
+    PlaySoundLevelElementAction(x, y, element, ACTION_IMPACT);
+
+    return;
+  }
+#else
+  else if (impact && CAN_CHANGE(element) &&
+	   HAS_CHANGE_EVENT(element, CE_IMPACT))
+  {
+    PlaySoundLevelElementAction(x, y, element, ACTION_IMPACT);
+
+    ChangeElementNow(x, y, element);
+
+    return;
+  }
+#endif
+
+  if (impact && element == EL_AMOEBA_DROP)
+  {
+    if (object_hit && IS_PLAYER(x, y + 1))
+      KillHeroUnlessProtected(x, y + 1);
+    else if (object_hit && smashed == EL_PENGUIN)
+      Bang(x, y + 1);
+    else
+    {
+      Feld[x][y] = EL_AMOEBA_GROWING;
+      Store[x][y] = EL_AMOEBA_WET;
+
+      ResetRandomAnimationValue(x, y);
+    }
+    return;
+  }
+
+  if (object_hit)		/* check which object was hit */
+  {
+    if (CAN_PASS_MAGIC_WALL(element) && 
+	(smashed == EL_MAGIC_WALL ||
+	 smashed == EL_BD_MAGIC_WALL))
+    {
+      int xx, yy;
+      int activated_magic_wall =
+	(smashed == EL_MAGIC_WALL ? EL_MAGIC_WALL_ACTIVE :
+	 EL_BD_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;
+
+      game.magic_wall_time_left = level.time_magic_wall * FRAMES_PER_SECOND;
+      game.magic_wall_active = TRUE;
+
+      PlaySoundLevel(x, y, (smashed == EL_MAGIC_WALL ?
+			    SND_MAGIC_WALL_ACTIVATING :
+			    SND_BD_MAGIC_WALL_ACTIVATING));
+    }
+
+    if (IS_PLAYER(x, y + 1))
+    {
+      if (CAN_SMASH_PLAYER(element))
+      {
+	KillHeroUnlessProtected(x, y + 1);
+	return;
+      }
+    }
+    else if (smashed == EL_PENGUIN)
+    {
+      if (CAN_SMASH_PLAYER(element))
+      {
+	Bang(x, y + 1);
+	return;
+      }
+    }
+    else if (element == EL_BD_DIAMOND)
+    {
+      if (IS_CLASSIC_ENEMY(smashed) && IS_BD_ELEMENT(smashed))
+      {
+	Bang(x, y + 1);
+	return;
+      }
+    }
+    else if ((element == EL_SP_INFOTRON ||
+	      element == EL_SP_ZONK) &&
+	     (smashed == EL_SP_SNIKSNAK ||
+	      smashed == EL_SP_ELECTRON ||
+	      smashed == EL_SP_DISK_ORANGE))
+    {
+      Bang(x, y + 1);
+      return;
+    }
+    else if (CAN_SMASH_EVERYTHING(element))
+    {
+      if (IS_CLASSIC_ENEMY(smashed) ||
+	  CAN_EXPLODE_SMASHED(smashed))
+      {
+	Bang(x, y + 1);
+	return;
+      }
+      else if (!IS_MOVING(x, y + 1) && !IS_BLOCKED(x, y + 1))
+      {
+	if (smashed == EL_LAMP ||
+	    smashed == EL_LAMP_ACTIVE)
+	{
+	  Bang(x, y + 1);
+	  return;
+	}
+	else if (smashed == EL_NUT)
+	{
+	  Feld[x][y + 1] = EL_NUT_BREAKING;
+	  PlaySoundLevel(x, y, SND_NUT_BREAKING);
+	  RaiseScoreElement(EL_NUT);
+	  return;
+	}
+	else if (smashed == EL_PEARL)
+	{
+	  Feld[x][y + 1] = EL_PEARL_BREAKING;
+	  PlaySoundLevel(x, y, SND_PEARL_BREAKING);
+	  return;
+	}
+	else if (smashed == EL_DIAMOND)
+	{
+	  Feld[x][y + 1] = EL_DIAMOND_BREAKING;
+	  PlaySoundLevel(x, y, SND_DIAMOND_BREAKING);
+	  return;
+	}
+	else if (IS_BELT_SWITCH(smashed))
+	{
+	  ToggleBeltSwitch(x, y + 1);
+	}
+	else if (smashed == EL_SWITCHGATE_SWITCH_UP ||
+		 smashed == EL_SWITCHGATE_SWITCH_DOWN)
+	{
+	  ToggleSwitchgateSwitch(x, y + 1);
+	}
+	else if (smashed == EL_LIGHT_SWITCH ||
+		 smashed == EL_LIGHT_SWITCH_ACTIVE)
+	{
+	  ToggleLightSwitch(x, y + 1);
+	}
+#if 1
+	else
+	{
+	  CheckElementChange(x, y + 1, smashed, CE_SMASHED);
+	}
+#else
+	else if (CAN_CHANGE(smashed) && HAS_CHANGE_EVENT(smashed, CE_SMASHED))
+	{
+	  ChangeElementNow(x, y + 1, smashed);
+	}
+#endif
+      }
+      else
+      {
+	CheckElementChange(x, y + 1, smashed, CE_SMASHED);
+      }
+    }
+  }
+
+  /* play sound of magic wall / mill */
+  if (!lastline &&
+      (Feld[x][y + 1] == EL_MAGIC_WALL_ACTIVE ||
+       Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE))
+  {
+    if (Feld[x][y + 1] == EL_MAGIC_WALL_ACTIVE)
+      PlaySoundLevel(x, y, SND_MAGIC_WALL_FILLING);
+    else if (Feld[x][y + 1] == EL_BD_MAGIC_WALL_ACTIVE)
+      PlaySoundLevel(x, y, SND_BD_MAGIC_WALL_FILLING);
+
+    return;
+  }
+
+  /* play sound of object that hits the ground */
+  if (lastline || object_hit)
+    PlaySoundLevelElementAction(x, y, element, ACTION_IMPACT);
+}
+
+void TurnRound(int x, int y)
+{
+  static struct
+  {
+    int x, y;
+  } move_xy[] =
+  {
+    {  0,  0 },
+    { -1,  0 },
+    { +1,  0 },
+    {  0,  0 },
+    {  0, -1 },
+    {  0,  0 }, { 0, 0 }, { 0, 0 },
+    {  0, +1 }
+  };
+  static struct
+  {
+    int left, right, back;
+  } turn[] =
+  {
+    { 0,	0,		0	 },
+    { MV_DOWN,	MV_UP,		MV_RIGHT },
+    { MV_UP,	MV_DOWN,	MV_LEFT	 },
+    { 0,	0,		0	 },
+    { MV_LEFT,	MV_RIGHT,	MV_DOWN	 },
+    { 0,	0,		0	 },
+    { 0,	0,		0	 },
+    { 0,	0,		0	 },
+    { MV_RIGHT,	MV_LEFT,	MV_UP	 }
+  };
+
+  int element = Feld[x][y];
+  int old_move_dir = MovDir[x][y];
+  int left_dir  = turn[old_move_dir].left;
+  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_x  = x + left_dx,  left_y  = y + left_dy;
+  int right_x = x + right_dx, right_y = y + right_dy;
+  int move_x  = x + move_dx,  move_y  = y + move_dy;
+
+  int xx, yy;
+
+  if (element == EL_BUG || element == EL_BD_BUTTERFLY)
+  {
+    TestIfBadThingTouchesOtherBadThing(x, y);
+
+    if (ENEMY_CAN_ENTER_FIELD(right_x, right_y))
+      MovDir[x][y] = right_dir;
+    else if (!ENEMY_CAN_ENTER_FIELD(move_x, move_y))
+      MovDir[x][y] = left_dir;
+
+    if (element == EL_BUG && MovDir[x][y] != old_move_dir)
+      MovDelay[x][y] = 9;
+    else if (element == EL_BD_BUTTERFLY)     /* && MovDir[x][y] == left_dir) */
+      MovDelay[x][y] = 1;
+  }
+  else if (element == EL_SPACESHIP || element == EL_BD_FIREFLY ||
+	   element == EL_SP_SNIKSNAK || element == EL_SP_ELECTRON)
+  {
+    TestIfBadThingTouchesOtherBadThing(x, y);
+
+    if (ENEMY_CAN_ENTER_FIELD(left_x, left_y))
+      MovDir[x][y] = left_dir;
+    else if (!ENEMY_CAN_ENTER_FIELD(move_x, move_y))
+      MovDir[x][y] = right_dir;
+
+    if ((element == EL_SPACESHIP ||
+	 element == EL_SP_SNIKSNAK ||
+	 element == EL_SP_ELECTRON)
+	&& MovDir[x][y] != old_move_dir)
+      MovDelay[x][y] = 9;
+    else if (element == EL_BD_FIREFLY)	    /* && MovDir[x][y] == right_dir) */
+      MovDelay[x][y] = 1;
+  }
+  else if (element == EL_YAMYAM)
+  {
+    boolean can_turn_left  = YAMYAM_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = YAMYAM_CAN_ENTER_FIELD(right_x, right_y);
+
+    if (can_turn_left && can_turn_right)
+      MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
+    else if (can_turn_left)
+      MovDir[x][y] = (RND(2) ? left_dir : back_dir);
+    else if (can_turn_right)
+      MovDir[x][y] = (RND(2) ? right_dir : back_dir);
+    else
+      MovDir[x][y] = back_dir;
+
+    MovDelay[x][y] = 16 + 16 * RND(3);
+  }
+  else if (element == EL_DARK_YAMYAM)
+  {
+    boolean can_turn_left  = DARK_YAMYAM_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = DARK_YAMYAM_CAN_ENTER_FIELD(right_x, right_y);
+
+    if (can_turn_left && can_turn_right)
+      MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
+    else if (can_turn_left)
+      MovDir[x][y] = (RND(2) ? left_dir : back_dir);
+    else if (can_turn_right)
+      MovDir[x][y] = (RND(2) ? right_dir : back_dir);
+    else
+      MovDir[x][y] = back_dir;
+
+    MovDelay[x][y] = 16 + 16 * RND(3);
+  }
+  else if (element == EL_PACMAN)
+  {
+    boolean can_turn_left  = PACMAN_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = PACMAN_CAN_ENTER_FIELD(right_x, right_y);
+
+    if (can_turn_left && can_turn_right)
+      MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
+    else if (can_turn_left)
+      MovDir[x][y] = (RND(2) ? left_dir : back_dir);
+    else if (can_turn_right)
+      MovDir[x][y] = (RND(2) ? right_dir : back_dir);
+    else
+      MovDir[x][y] = back_dir;
+
+    MovDelay[x][y] = 6 + RND(40);
+  }
+  else if (element == EL_PIG)
+  {
+    boolean can_turn_left  = PIG_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = PIG_CAN_ENTER_FIELD(right_x, right_y);
+    boolean can_move_on    = PIG_CAN_ENTER_FIELD(move_x, move_y);
+    boolean should_turn_left, should_turn_right, should_move_on;
+    int rnd_value = 24;
+    int rnd = RND(rnd_value);
+
+    should_turn_left = (can_turn_left &&
+			(!can_move_on ||
+			 IN_LEV_FIELD_AND_NOT_FREE(x + back_dx + left_dx,
+						   y + back_dy + left_dy)));
+    should_turn_right = (can_turn_right &&
+			 (!can_move_on ||
+			  IN_LEV_FIELD_AND_NOT_FREE(x + back_dx + right_dx,
+						    y + back_dy + right_dy)));
+    should_move_on = (can_move_on &&
+		      (!can_turn_left ||
+		       !can_turn_right ||
+		       IN_LEV_FIELD_AND_NOT_FREE(x + move_dx + left_dx,
+						 y + move_dy + left_dy) ||
+		       IN_LEV_FIELD_AND_NOT_FREE(x + move_dx + right_dx,
+						 y + move_dy + right_dy)));
+
+    if (should_turn_left || should_turn_right || should_move_on)
+    {
+      if (should_turn_left && should_turn_right && should_move_on)
+	MovDir[x][y] = (rnd < rnd_value / 3     ? left_dir :
+			rnd < 2 * rnd_value / 3 ? right_dir :
+			old_move_dir);
+      else if (should_turn_left && should_turn_right)
+	MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : right_dir);
+      else if (should_turn_left && should_move_on)
+	MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : old_move_dir);
+      else if (should_turn_right && should_move_on)
+	MovDir[x][y] = (rnd < rnd_value / 2 ? right_dir : old_move_dir);
+      else if (should_turn_left)
+	MovDir[x][y] = left_dir;
+      else if (should_turn_right)
+	MovDir[x][y] = right_dir;
+      else if (should_move_on)
+	MovDir[x][y] = old_move_dir;
+    }
+    else if (can_move_on && rnd > rnd_value / 8)
+      MovDir[x][y] = old_move_dir;
+    else if (can_turn_left && can_turn_right)
+      MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : right_dir);
+    else if (can_turn_left && rnd > rnd_value / 8)
+      MovDir[x][y] = left_dir;
+    else if (can_turn_right && rnd > rnd_value/8)
+      MovDir[x][y] = right_dir;
+    else
+      MovDir[x][y] = back_dir;
+
+    xx = x + move_xy[MovDir[x][y]].x;
+    yy = y + move_xy[MovDir[x][y]].y;
+
+    if (!IS_FREE(xx, yy) && !IS_FOOD_PIG(Feld[xx][yy]))
+      MovDir[x][y] = old_move_dir;
+
+    MovDelay[x][y] = 0;
+  }
+  else if (element == EL_DRAGON)
+  {
+    boolean can_turn_left  = IN_LEV_FIELD_AND_IS_FREE(left_x, left_y);
+    boolean can_turn_right = IN_LEV_FIELD_AND_IS_FREE(right_x, right_y);
+    boolean can_move_on    = IN_LEV_FIELD_AND_IS_FREE(move_x, move_y);
+    int rnd_value = 24;
+    int rnd = RND(rnd_value);
+
+    if (can_move_on && rnd > rnd_value / 8)
+      MovDir[x][y] = old_move_dir;
+    else if (can_turn_left && can_turn_right)
+      MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : right_dir);
+    else if (can_turn_left && rnd > rnd_value / 8)
+      MovDir[x][y] = left_dir;
+    else if (can_turn_right && rnd > rnd_value / 8)
+      MovDir[x][y] = right_dir;
+    else
+      MovDir[x][y] = back_dir;
+
+    xx = x + move_xy[MovDir[x][y]].x;
+    yy = y + move_xy[MovDir[x][y]].y;
+
+    if (!IS_FREE(xx, yy))
+      MovDir[x][y] = old_move_dir;
+
+    MovDelay[x][y] = 0;
+  }
+  else if (element == EL_MOLE)
+  {
+    boolean can_move_on =
+      (MOLE_CAN_ENTER_FIELD(move_x, move_y,
+			    IS_AMOEBOID(Feld[move_x][move_y]) ||
+			    Feld[move_x][move_y] == EL_AMOEBA_SHRINKING));
+    if (!can_move_on)
+    {
+      boolean can_turn_left =
+	(MOLE_CAN_ENTER_FIELD(left_x, left_y,
+			      IS_AMOEBOID(Feld[left_x][left_y])));
+
+      boolean can_turn_right =
+	(MOLE_CAN_ENTER_FIELD(right_x, right_y,
+			      IS_AMOEBOID(Feld[right_x][right_y])));
+
+      if (can_turn_left && can_turn_right)
+	MovDir[x][y] = (RND(2) ? left_dir : right_dir);
+      else if (can_turn_left)
+	MovDir[x][y] = left_dir;
+      else
+	MovDir[x][y] = right_dir;
+    }
+
+    if (MovDir[x][y] != old_move_dir)
+      MovDelay[x][y] = 9;
+  }
+  else if (element == EL_BALLOON)
+  {
+    MovDir[x][y] = game.balloon_dir;
+    MovDelay[x][y] = 0;
+  }
+  else if (element == EL_SPRING)
+  {
+    if (MovDir[x][y] & MV_HORIZONTAL &&
+	(!IN_LEV_FIELD_AND_IS_FREE(move_x, move_y) ||
+	 IN_LEV_FIELD_AND_IS_FREE(x, y + 1)))
+      MovDir[x][y] = MV_NO_MOVING;
+
+    MovDelay[x][y] = 0;
+  }
+  else if (element == EL_ROBOT ||
+	   element == EL_SATELLITE ||
+	   element == EL_PENGUIN)
+  {
+    int attr_x = -1, attr_y = -1;
+
+    if (AllPlayersGone)
+    {
+      attr_x = ExitX;
+      attr_y = ExitY;
+    }
+    else
+    {
+      int i;
+
+      for (i=0; i<MAX_PLAYERS; i++)
+      {
+	struct PlayerInfo *player = &stored_player[i];
+	int jx = player->jx, jy = player->jy;
+
+	if (!player->active)
+	  continue;
+
+	if (attr_x == -1 ||
+	    ABS(jx - x) + ABS(jy - y) < ABS(attr_x - x) + ABS(attr_y - y))
+	{
+	  attr_x = jx;
+	  attr_y = jy;
+	}
+      }
+    }
+
+    if (element == EL_ROBOT && ZX >= 0 && ZY >= 0)
+    {
+      attr_x = ZX;
+      attr_y = ZY;
+    }
+
+    if (element == EL_PENGUIN)
+    {
+      int i;
+      static int xy[4][2] =
+      {
+	{ 0, -1 },
+	{ -1, 0 },
+	{ +1, 0 },
+	{ 0, +1 }
+      };
+
+      for (i=0; i<4; i++)
+      {
+    	int ex = x + xy[i % 4][0];
+    	int ey = y + xy[i % 4][1];
+
+    	if (IN_LEV_FIELD(ex, ey) && Feld[ex][ey] == EL_EXIT_OPEN)
+	{
+	  attr_x = ex;
+ 	  attr_y = ey;
+	  break;
+	}
+      }
+    }
+
+    MovDir[x][y] = MV_NO_MOVING;
+    if (attr_x < x)
+      MovDir[x][y] |= (AllPlayersGone ? MV_RIGHT : MV_LEFT);
+    else if (attr_x > x)
+      MovDir[x][y] |= (AllPlayersGone ? MV_LEFT : MV_RIGHT);
+    if (attr_y < y)
+      MovDir[x][y] |= (AllPlayersGone ? MV_DOWN : MV_UP);
+    else if (attr_y > y)
+      MovDir[x][y] |= (AllPlayersGone ? MV_UP : MV_DOWN);
+
+    if (element == EL_ROBOT)
+    {
+      int newx, newy;
+
+      if (MovDir[x][y] & MV_HORIZONTAL && MovDir[x][y] & MV_VERTICAL)
+	MovDir[x][y] &= (RND(2) ? MV_HORIZONTAL : MV_VERTICAL);
+      Moving2Blocked(x, y, &newx, &newy);
+
+      if (IN_LEV_FIELD(newx, newy) && IS_FREE_OR_PLAYER(newx, newy))
+	MovDelay[x][y] = 8 + 8 * !RND(3);
+      else
+	MovDelay[x][y] = 16;
+    }
+    else if (element == EL_PENGUIN)
+    {
+      int newx, newy;
+
+      MovDelay[x][y] = 1;
+
+      if (MovDir[x][y] & MV_HORIZONTAL && MovDir[x][y] & MV_VERTICAL)
+      {
+	boolean first_horiz = RND(2);
+	int new_move_dir = MovDir[x][y];
+
+	MovDir[x][y] =
+	  new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
+	Moving2Blocked(x, y, &newx, &newy);
+
+	if (PENGUIN_CAN_ENTER_FIELD(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(newx, newy))
+	  return;
+
+	MovDir[x][y] = old_move_dir;
+	return;
+      }
+    }
+    else	/* (element == EL_SATELLITE) */
+    {
+      int newx, newy;
+
+      MovDelay[x][y] = 1;
+
+      if (MovDir[x][y] & MV_HORIZONTAL && MovDir[x][y] & MV_VERTICAL)
+      {
+	boolean first_horiz = RND(2);
+	int new_move_dir = MovDir[x][y];
+
+	MovDir[x][y] =
+	  new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
+	Moving2Blocked(x, y, &newx, &newy);
+
+	if (ELEMENT_CAN_ENTER_FIELD_OR_ACID_2(newx, newy))
+	  return;
+
+	MovDir[x][y] =
+	  new_move_dir & (!first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
+	Moving2Blocked(x, y, &newx, &newy);
+
+	if (ELEMENT_CAN_ENTER_FIELD_OR_ACID_2(newx, newy))
+	  return;
+
+	MovDir[x][y] = old_move_dir;
+	return;
+      }
+    }
+  }
+  else if (element_info[element].move_pattern == MV_ALL_DIRECTIONS ||
+	   element_info[element].move_pattern == MV_TURNING_LEFT ||
+	   element_info[element].move_pattern == MV_TURNING_RIGHT)
+  {
+    boolean can_turn_left  = ELEMENT_CAN_ENTER_FIELD(element, left_x, left_y);
+    boolean can_turn_right = ELEMENT_CAN_ENTER_FIELD(element, right_x,right_y);
+
+    if (element_info[element].move_pattern == MV_TURNING_LEFT)
+      MovDir[x][y] = left_dir;
+    else if (element_info[element].move_pattern == MV_TURNING_RIGHT)
+      MovDir[x][y] = right_dir;
+    else if (can_turn_left && can_turn_right)
+      MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
+    else if (can_turn_left)
+      MovDir[x][y] = (RND(2) ? left_dir : back_dir);
+    else if (can_turn_right)
+      MovDir[x][y] = (RND(2) ? right_dir : back_dir);
+    else
+      MovDir[x][y] = back_dir;
+
+    MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
+  }
+  else if (element_info[element].move_pattern == MV_HORIZONTAL ||
+	   element_info[element].move_pattern == MV_VERTICAL)
+  {
+    if (element_info[element].move_pattern & old_move_dir)
+      MovDir[x][y] = back_dir;
+    else if (element_info[element].move_pattern == MV_HORIZONTAL)
+      MovDir[x][y] = (RND(2) ? MV_LEFT : MV_RIGHT);
+    else if (element_info[element].move_pattern == MV_VERTICAL)
+      MovDir[x][y] = (RND(2) ? MV_UP : MV_DOWN);
+
+    MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
+  }
+  else if (element_info[element].move_pattern & MV_ANY_DIRECTION)
+  {
+    MovDir[x][y] = element_info[element].move_pattern;
+    MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
+  }
+  else if (element_info[element].move_pattern == MV_ALONG_LEFT_SIDE)
+  {
+    if (ELEMENT_CAN_ENTER_FIELD(element, left_x, left_y))
+      MovDir[x][y] = left_dir;
+    else if (!ELEMENT_CAN_ENTER_FIELD(element, move_x, move_y))
+      MovDir[x][y] = right_dir;
+
+    if (MovDir[x][y] != old_move_dir)
+      MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
+  }
+  else if (element_info[element].move_pattern == MV_ALONG_RIGHT_SIDE)
+  {
+    if (ELEMENT_CAN_ENTER_FIELD(element, right_x, right_y))
+      MovDir[x][y] = right_dir;
+    else if (!ELEMENT_CAN_ENTER_FIELD(element, move_x, move_y))
+      MovDir[x][y] = left_dir;
+
+    if (MovDir[x][y] != old_move_dir)
+      MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
+  }
+  else if (element_info[element].move_pattern == MV_TOWARDS_PLAYER ||
+	   element_info[element].move_pattern == MV_AWAY_FROM_PLAYER)
+  {
+    int attr_x = -1, attr_y = -1;
+    int newx, newy;
+    boolean move_away =
+      (element_info[element].move_pattern == MV_AWAY_FROM_PLAYER);
+
+    if (AllPlayersGone)
+    {
+      attr_x = ExitX;
+      attr_y = ExitY;
+    }
+    else
+    {
+      int i;
+
+      for (i=0; i<MAX_PLAYERS; i++)
+      {
+	struct PlayerInfo *player = &stored_player[i];
+	int jx = player->jx, jy = player->jy;
+
+	if (!player->active)
+	  continue;
+
+	if (attr_x == -1 ||
+	    ABS(jx - x) + ABS(jy - y) < ABS(attr_x - x) + ABS(attr_y - y))
+	{
+	  attr_x = jx;
+	  attr_y = jy;
+	}
+      }
+    }
+
+    MovDir[x][y] = MV_NO_MOVING;
+    if (attr_x < x)
+      MovDir[x][y] |= (move_away ? MV_RIGHT : MV_LEFT);
+    else if (attr_x > x)
+      MovDir[x][y] |= (move_away ? MV_LEFT : MV_RIGHT);
+    if (attr_y < y)
+      MovDir[x][y] |= (move_away ? MV_DOWN : MV_UP);
+    else if (attr_y > y)
+      MovDir[x][y] |= (move_away ? MV_UP : MV_DOWN);
+
+    MovDelay[x][y] = GET_NEW_MOVE_DELAY(element);
+
+    if (MovDir[x][y] & MV_HORIZONTAL && MovDir[x][y] & MV_VERTICAL)
+    {
+      boolean first_horiz = RND(2);
+      int new_move_dir = MovDir[x][y];
+
+      MovDir[x][y] =
+	new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
+      Moving2Blocked(x, y, &newx, &newy);
+
+      if (ELEMENT_CAN_ENTER_FIELD_OR_ACID(element, newx, newy))
+	return;
+
+      MovDir[x][y] =
+	new_move_dir & (!first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
+      Moving2Blocked(x, y, &newx, &newy);
+
+      if (ELEMENT_CAN_ENTER_FIELD_OR_ACID(element, newx, newy))
+	return;
+
+      MovDir[x][y] = old_move_dir;
+    }
+  }
+}
+
+static boolean JustBeingPushed(int x, int y)
+{
+  int i;
+
+  for (i=0; i<MAX_PLAYERS; i++)
+  {
+    struct PlayerInfo *player = &stored_player[i];
+
+    if (player->active && player->Pushing && player->MovPos)
+    {
+      int next_jx = player->jx + (player->jx - player->last_jx);
+      int next_jy = player->jy + (player->jy - player->last_jy);
+
+      if (x == next_jx && y == next_jy)
+	return TRUE;
+    }
+  }
+
+  return FALSE;
+}
+
+void StartMoving(int x, int y)
+{
+  boolean use_spring_bug = (game.engine_version < VERSION_IDENT(2,2,0));
+  boolean started_moving = FALSE;	/* some elements can fall _and_ move */
+  int element = Feld[x][y];
+
+  if (Stop[x][y])
+    return;
+
+  GfxAction[x][y] = ACTION_DEFAULT;
+
+  if (CAN_FALL(element) && y < lev_fieldy - 1)
+  {
+    if ((x>0 && IS_PLAYER(x-1, y)) || (x<lev_fieldx-1 && IS_PLAYER(x+1, y)))
+      if (JustBeingPushed(x, y))
+	return;
+
+    if (element == EL_QUICKSAND_FULL)
+    {
+      if (IS_FREE(x, y + 1))
+      {
+	InitMovingField(x, y, MV_DOWN);
+	started_moving = TRUE;
+
+	Feld[x][y] = EL_QUICKSAND_EMPTYING;
+	Store[x][y] = EL_ROCK;
+#if 1
+	PlaySoundLevelAction(x, y, ACTION_EMPTYING);
+#else
+	PlaySoundLevel(x, y, SND_QUICKSAND_EMPTYING);
+#endif
+      }
+      else if (Feld[x][y + 1] == EL_QUICKSAND_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_EMPTY;
+	Feld[x][y + 1] = EL_QUICKSAND_FULL;
+	Store[x][y + 1] = Store[x][y];
+	Store[x][y] = 0;
+#if 1
+	PlaySoundLevelAction(x, y, ACTION_FILLING);
+#else
+	PlaySoundLevel(x, y, SND_QUICKSAND_FILLING);
+#endif
+      }
+    }
+    else if ((element == EL_ROCK || element == EL_BD_ROCK) &&
+	     Feld[x][y + 1] == EL_QUICKSAND_EMPTY)
+    {
+      InitMovingField(x, y, MV_DOWN);
+      started_moving = TRUE;
+
+      Feld[x][y] = EL_QUICKSAND_FILLING;
+      Store[x][y] = element;
+#if 1
+      PlaySoundLevelAction(x, y, ACTION_FILLING);
+#else
+      PlaySoundLevel(x, y, SND_QUICKSAND_FILLING);
+#endif
+    }
+    else if (element == EL_MAGIC_WALL_FULL)
+    {
+      if (IS_FREE(x, y + 1))
+      {
+	InitMovingField(x, y, MV_DOWN);
+	started_moving = TRUE;
+
+	Feld[x][y] = EL_MAGIC_WALL_EMPTYING;
+	Store[x][y] = EL_CHANGED(Store[x][y]);
+      }
+      else if (Feld[x][y + 1] == EL_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_MAGIC_WALL_ACTIVE;
+	Feld[x][y + 1] = EL_MAGIC_WALL_FULL;
+	Store[x][y + 1] = EL_CHANGED(Store[x][y]);
+	Store[x][y] = 0;
+      }
+    }
+    else if (element == EL_BD_MAGIC_WALL_FULL)
+    {
+      if (IS_FREE(x, y + 1))
+      {
+	InitMovingField(x, y, MV_DOWN);
+	started_moving = TRUE;
+
+	Feld[x][y] = EL_BD_MAGIC_WALL_EMPTYING;
+	Store[x][y] = EL_CHANGED2(Store[x][y]);
+      }
+      else if (Feld[x][y + 1] == EL_BD_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_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] = 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))
+    {
+      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);
+      Store[x][y] = element;
+    }
+#if 0
+    else if (CAN_SMASH(element) && Feld[x][y + 1] == EL_ACID)
+#else
+    else if (CAN_FALL(element) && Feld[x][y + 1] == EL_ACID)
+#endif
+    {
+      SplashAcid(x, y);
+
+      InitMovingField(x, y, MV_DOWN);
+      started_moving = TRUE;
+
+      Store[x][y] = EL_ACID;
+#if 0
+      /* !!! TEST !!! better use "_FALLING" etc. !!! */
+      GfxAction[x][y + 1] = ACTION_ACTIVE;
+#endif
+    }
+#if 1
+#if 1
+    else if (game.engine_version < RELEASE_IDENT(2,2,0,7) &&
+	     CAN_SMASH(element) && Feld[x][y + 1] == EL_BLOCKED &&
+	     JustStopped[x][y] && !Pushed[x][y + 1])
+#else
+    else if (CAN_SMASH(element) && Feld[x][y + 1] == EL_BLOCKED &&
+	     JustStopped[x][y])
+#endif
+    {
+      /* calling "Impact()" here is not only completely unneccessary
+	 (because it already gets called from "ContinueMoving()" in
+	 all relevant situations), but also completely bullshit, because
+	 "JustStopped" also indicates a finished *horizontal* movement;
+	 we must keep this trash for backwards compatibility with older
+	 tapes */
+
+      Impact(x, y);
+    }
+#endif
+    else if (IS_FREE(x, y + 1) && element == EL_SPRING && use_spring_bug)
+    {
+      if (MovDir[x][y] == MV_NO_MOVING)
+      {
+	InitMovingField(x, y, MV_DOWN);
+	started_moving = TRUE;
+      }
+    }
+    else if (IS_FREE(x, y + 1) || Feld[x][y + 1] == EL_DIAMOND_BREAKING)
+    {
+      if (JustStopped[x][y])	/* prevent animation from being restarted */
+	MovDir[x][y] = MV_DOWN;
+
+      InitMovingField(x, y, MV_DOWN);
+      started_moving = TRUE;
+    }
+    else if (element == EL_AMOEBA_DROP)
+    {
+      Feld[x][y] = EL_AMOEBA_GROWING;
+      Store[x][y] = EL_AMOEBA_WET;
+    }
+    /* Store[x][y + 1] must be zero, because:
+       (EL_QUICKSAND_FULL -> EL_ROCK): Store[x][y + 1] == EL_QUICKSAND_EMPTY
+    */
+#if 0
+#if OLD_GAME_BEHAVIOUR
+    else if (IS_SLIPPERY(Feld[x][y + 1]) && !Store[x][y + 1])
+#else
+    else if (IS_SLIPPERY(Feld[x][y + 1]) && !Store[x][y + 1] &&
+	     !IS_FALLING(x, y + 1) && !JustStopped[x][y + 1] &&
+	     element != EL_DX_SUPABOMB)
+#endif
+#else
+    else if (((IS_SLIPPERY(Feld[x][y + 1]) && !IS_PLAYER(x, y + 1)) ||
+	      (IS_EM_SLIPPERY_WALL(Feld[x][y + 1]) && IS_GEM(element))) &&
+	     !IS_FALLING(x, y + 1) && !JustStopped[x][y + 1] &&
+	     element != EL_DX_SUPABOMB && element != EL_SP_DISK_ORANGE)
+#endif
+    {
+      boolean left  = (x>0 && IS_FREE(x-1, y) &&
+		       (IS_FREE(x-1, y + 1) || Feld[x-1][y + 1] == EL_ACID));
+      boolean right = (x<lev_fieldx-1 && IS_FREE(x+1, y) &&
+		       (IS_FREE(x+1, y + 1) || Feld[x+1][y + 1] == EL_ACID));
+
+      if (left || right)
+      {
+	if (left && right &&
+	    (game.emulation != EMU_BOULDERDASH &&
+	     element != EL_BD_ROCK && element != EL_BD_DIAMOND))
+	  left = !(right = RND(2));
+
+	InitMovingField(x, y, left ? MV_LEFT : MV_RIGHT);
+	started_moving = TRUE;
+
+#if 0
+	if (element == EL_BOMB)
+	  printf("::: SLIP DOWN [%d]\n", FrameCounter);
+#endif
+      }
+    }
+    else if (IS_BELT_ACTIVE(Feld[x][y + 1]))
+    {
+      boolean left_is_free  = (x>0 && IS_FREE(x-1, y));
+      boolean right_is_free = (x<lev_fieldx-1 && IS_FREE(x+1, y));
+      int belt_nr = getBeltNrFromBeltActiveElement(Feld[x][y + 1]);
+      int belt_dir = game.belt_dir[belt_nr];
+
+      if ((belt_dir == MV_LEFT  && left_is_free) ||
+	  (belt_dir == MV_RIGHT && right_is_free))
+      {
+	InitMovingField(x, y, belt_dir);
+	started_moving = TRUE;
+
+	GfxAction[x][y] = ACTION_DEFAULT;
+      }
+    }
+  }
+
+  /* not "else if" because of elements that can fall and move (EL_SPRING) */
+  if (CAN_MOVE(element) && !started_moving)
+  {
+    int newx, newy;
+
+    if ((element == EL_SATELLITE ||
+	 element == EL_BALLOON ||
+	 element == EL_SPRING)
+	&& JustBeingPushed(x, y))
+      return;
+
+#if 0
+#if 0
+    if (element == EL_SPRING && MovDir[x][y] == MV_DOWN)
+      Feld[x][y + 1] = EL_EMPTY;	/* was set to EL_BLOCKED above */
+#else
+    if (element == EL_SPRING && MovDir[x][y] != MV_NO_MOVING)
+    {
+      Moving2Blocked(x, y, &newx, &newy);
+      if (Feld[newx][newy] == EL_BLOCKED)
+	Feld[newx][newy] = EL_EMPTY;	/* was set to EL_BLOCKED above */
+    }
+#endif
+#endif
+
+    if (!MovDelay[x][y])	/* start new movement phase */
+    {
+      /* all objects that can change their move direction after each step
+	 (YAMYAM, DARK_YAMYAM and PACMAN go straight until they hit a wall */
+
+      if (element != EL_YAMYAM &&
+	  element != EL_DARK_YAMYAM &&
+	  element != EL_PACMAN &&
+	  !(element_info[element].move_pattern & MV_ANY_DIRECTION) &&
+	  element_info[element].move_pattern != MV_TURNING_LEFT &&
+	  element_info[element].move_pattern != MV_TURNING_RIGHT)
+      {
+	TurnRound(x, y);
+
+	if (MovDelay[x][y] && (element == EL_BUG ||
+			       element == EL_SPACESHIP ||
+			       element == EL_SP_SNIKSNAK ||
+			       element == EL_SP_ELECTRON ||
+			       element == EL_MOLE))
+	  DrawLevelField(x, y);
+      }
+    }
+
+    if (MovDelay[x][y])		/* wait some time before next movement */
+    {
+      MovDelay[x][y]--;
+
+#if 0
+      if (element == EL_YAMYAM)
+      {
+	printf("::: %d\n",
+	       el_act_dir2img(EL_YAMYAM, ACTION_WAITING, MV_LEFT));
+	DrawLevelElementAnimation(x, y, element);
+      }
+#endif
+
+      if (MovDelay[x][y])	/* element still has to wait some time */
+      {
+#if 0
+	/* !!! PLACE THIS SOMEWHERE AFTER "TurnRound()" !!! */
+	ResetGfxAnimation(x, y);
+#endif
+	GfxAction[x][y] = ACTION_WAITING;
+      }
+
+      if (element == EL_ROBOT ||
+#if 0
+	  element == EL_PACMAN ||
+#endif
+	  element == EL_YAMYAM ||
+	  element == EL_DARK_YAMYAM)
+      {
+#if 0
+	DrawLevelElementAnimation(x, y, element);
+#else
+	DrawLevelElementAnimationIfNeeded(x, y, element);
+#endif
+	PlaySoundLevelAction(x, y, ACTION_WAITING);
+      }
+      else if (element == EL_SP_ELECTRON)
+	DrawLevelElementAnimationIfNeeded(x, y, element);
+      else if (element == EL_DRAGON)
+      {
+	int i;
+	int dir = MovDir[x][y];
+	int dx = (dir == MV_LEFT ? -1 : dir == MV_RIGHT ? +1 : 0);
+	int dy = (dir == MV_UP   ? -1 : dir == MV_DOWN  ? +1 : 0);
+	int graphic = (dir == MV_LEFT	? IMG_FLAMES_1_LEFT :
+		       dir == MV_RIGHT	? IMG_FLAMES_1_RIGHT :
+		       dir == MV_UP	? IMG_FLAMES_1_UP :
+		       dir == MV_DOWN	? IMG_FLAMES_1_DOWN : IMG_EMPTY);
+	int frame = getGraphicAnimationFrame(graphic, -1);
+
+	for (i=1; i<=3; i++)
+	{
+	  int xx = x + i*dx, yy = y + i*dy;
+	  int sx = SCREENX(xx), sy = SCREENY(yy);
+	  int flame_graphic = graphic + (i - 1);
+
+	  if (!IN_LEV_FIELD(xx, yy) || IS_DRAGONFIRE_PROOF(Feld[xx][yy]))
+	    break;
+
+	  if (MovDelay[x][y])
+	  {
+	    int flamed = MovingOrBlocked2Element(xx, yy);
+
+	    if (IS_CLASSIC_ENEMY(flamed) || CAN_EXPLODE_BY_FIRE(flamed))
+	      Bang(xx, yy);
+	    else
+	      RemoveMovingField(xx, yy);
+
+	    Feld[xx][yy] = EL_FLAMES;
+	    if (IN_SCR_FIELD(sx, sy))
+	      DrawGraphic(sx, sy, flame_graphic, frame);
+	  }
+	  else
+	  {
+	    if (Feld[xx][yy] == EL_FLAMES)
+	      Feld[xx][yy] = EL_EMPTY;
+	    DrawLevelField(xx, yy);
+	  }
+	}
+      }
+
+      if (MovDelay[x][y])	/* element still has to wait some time */
+      {
+	PlaySoundLevelAction(x, y, ACTION_WAITING);
+
+	return;
+      }
+
+      GfxAction[x][y] = ACTION_MOVING;
+    }
+
+    /* now make next step */
+
+    Moving2Blocked(x, y, &newx, &newy);	/* get next screen position */
+
+    if (DONT_COLLIDE_WITH(element) && IS_PLAYER(newx, newy) &&
+	!PLAYER_PROTECTED(newx, newy))
+    {
+#if 1
+      TestIfBadThingRunsIntoHero(x, y, MovDir[x][y]);
+      return;
+#else
+      /* player killed by element which is deadly when colliding with */
+      MovDir[x][y] = 0;
+      KillHero(PLAYERINFO(newx, newy));
+      return;
+#endif
+
+    }
+    else if ((element == EL_PENGUIN ||
+	      element == EL_ROBOT ||
+	      element == EL_SATELLITE ||
+	      element == EL_BALLOON ||
+	      IS_CUSTOM_ELEMENT(element)) &&
+	     IN_LEV_FIELD(newx, newy) &&
+	     MovDir[x][y] == MV_DOWN && Feld[newx][newy] == EL_ACID)
+    {
+      SplashAcid(x, y);
+      Store[x][y] = EL_ACID;
+    }
+    else if (element == EL_PENGUIN && IN_LEV_FIELD(newx, newy))
+    {
+      if (Feld[newx][newy] == EL_EXIT_OPEN)
+      {
+	Feld[x][y] = EL_EMPTY;
+	DrawLevelField(x, y);
+
+	PlaySoundLevel(newx, newy, SND_PENGUIN_PASSING);
+	if (IN_SCR_FIELD(SCREENX(newx), SCREENY(newy)))
+	  DrawGraphicThruMask(SCREENX(newx),SCREENY(newy), el2img(element), 0);
+
+	local_player->friends_still_needed--;
+	if (!local_player->friends_still_needed &&
+	    !local_player->GameOver && AllPlayersGone)
+	  local_player->LevelSolved = local_player->GameOver = TRUE;
+
+	return;
+      }
+      else if (IS_FOOD_PENGUIN(Feld[newx][newy]))
+      {
+	if (DigField(local_player, newx, newy, 0, 0, DF_DIG) == MF_MOVING)
+	  DrawLevelField(newx, newy);
+	else
+	  MovDir[x][y] = MV_NO_MOVING;
+      }
+      else if (!IS_FREE(newx, newy))
+      {
+	GfxAction[x][y] = ACTION_WAITING;
+
+	if (IS_PLAYER(x, y))
+	  DrawPlayerField(x, y);
+	else
+	  DrawLevelField(x, y);
+	return;
+      }
+    }
+    else if (element == EL_PIG && IN_LEV_FIELD(newx, newy))
+    {
+      if (IS_FOOD_PIG(Feld[newx][newy]))
+      {
+	if (IS_MOVING(newx, newy))
+	  RemoveMovingField(newx, newy);
+	else
+	{
+	  Feld[newx][newy] = EL_EMPTY;
+	  DrawLevelField(newx, newy);
+	}
+
+	PlaySoundLevel(x, y, SND_PIG_DIGGING);
+      }
+      else if (!IS_FREE(newx, newy))
+      {
+	if (IS_PLAYER(x, y))
+	  DrawPlayerField(x, y);
+	else
+	  DrawLevelField(x, y);
+	return;
+      }
+    }
+    else if (element == EL_DRAGON && IN_LEV_FIELD(newx, newy))
+    {
+      if (!IS_FREE(newx, newy))
+      {
+	if (IS_PLAYER(x, y))
+	  DrawPlayerField(x, y);
+	else
+	  DrawLevelField(x, y);
+	return;
+      }
+      else
+      {
+	boolean wanna_flame = !RND(10);
+	int dx = newx - x, dy = newy - y;
+	int newx1 = newx+1*dx, newy1 = newy+1*dy;
+	int newx2 = newx+2*dx, newy2 = newy+2*dy;
+	int element1 = (IN_LEV_FIELD(newx1, newy1) ?
+			MovingOrBlocked2Element(newx1, newy1) : EL_STEELWALL);
+	int element2 = (IN_LEV_FIELD(newx2, newy2) ?
+			MovingOrBlocked2Element(newx2, newy2) : EL_STEELWALL);
+
+	if ((wanna_flame ||
+	     IS_CLASSIC_ENEMY(element1) ||
+	     IS_CLASSIC_ENEMY(element2)) &&
+	    element1 != EL_DRAGON && element2 != EL_DRAGON &&
+	    element1 != EL_FLAMES && element2 != EL_FLAMES)
+	{
+	  if (IS_PLAYER(x, y))
+	    DrawPlayerField(x, y);
+	  else
+	    DrawLevelField(x, y);
+
+	  PlaySoundLevel(x, y, SND_DRAGON_ATTACKING);
+
+	  MovDelay[x][y] = 50;
+	  Feld[newx][newy] = EL_FLAMES;
+	  if (IN_LEV_FIELD(newx1, newy1) && Feld[newx1][newy1] == EL_EMPTY)
+	    Feld[newx1][newy1] = EL_FLAMES;
+	  if (IN_LEV_FIELD(newx2, newy2) && Feld[newx2][newy2] == EL_EMPTY)
+	    Feld[newx2][newy2] = EL_FLAMES;
+	  return;
+	}
+      }
+    }
+    else if (element == EL_YAMYAM && IN_LEV_FIELD(newx, newy) &&
+	     Feld[newx][newy] == EL_DIAMOND)
+    {
+      if (IS_MOVING(newx, newy))
+	RemoveMovingField(newx, newy);
+      else
+      {
+	Feld[newx][newy] = EL_EMPTY;
+	DrawLevelField(newx, newy);
+      }
+
+      PlaySoundLevel(x, y, SND_YAMYAM_DIGGING);
+    }
+    else if (element == EL_DARK_YAMYAM && IN_LEV_FIELD(newx, newy) &&
+	     IS_FOOD_DARK_YAMYAM(Feld[newx][newy]))
+    {
+      if (AmoebaNr[newx][newy])
+      {
+	AmoebaCnt2[AmoebaNr[newx][newy]]--;
+	if (Feld[newx][newy] == EL_AMOEBA_FULL ||
+	    Feld[newx][newy] == EL_BD_AMOEBA)
+	  AmoebaCnt[AmoebaNr[newx][newy]]--;
+      }
+
+      if (IS_MOVING(newx, newy))
+	RemoveMovingField(newx, newy);
+      else
+      {
+	Feld[newx][newy] = EL_EMPTY;
+	DrawLevelField(newx, newy);
+      }
+
+      PlaySoundLevel(x, y, SND_DARK_YAMYAM_DIGGING);
+    }
+    else if ((element == EL_PACMAN || element == EL_MOLE)
+	     && IN_LEV_FIELD(newx, newy) && IS_AMOEBOID(Feld[newx][newy]))
+    {
+      if (AmoebaNr[newx][newy])
+      {
+	AmoebaCnt2[AmoebaNr[newx][newy]]--;
+	if (Feld[newx][newy] == EL_AMOEBA_FULL ||
+	    Feld[newx][newy] == EL_BD_AMOEBA)
+	  AmoebaCnt[AmoebaNr[newx][newy]]--;
+      }
+
+      if (element == EL_MOLE)
+      {
+	Feld[newx][newy] = EL_AMOEBA_SHRINKING;
+	PlaySoundLevel(x, y, SND_MOLE_DIGGING);
+	MovDelay[newx][newy] = 0;	/* start amoeba shrinking delay */
+	return;				/* wait for shrinking amoeba */
+      }
+      else	/* element == EL_PACMAN */
+      {
+	Feld[newx][newy] = EL_EMPTY;
+	DrawLevelField(newx, newy);
+	PlaySoundLevel(x, y, SND_PACMAN_DIGGING);
+      }
+    }
+    else if (element == EL_MOLE && IN_LEV_FIELD(newx, newy) &&
+	     (Feld[newx][newy] == EL_AMOEBA_SHRINKING ||
+	      (Feld[newx][newy] == EL_EMPTY && Stop[newx][newy])))
+    {
+      /* wait for shrinking amoeba to completely disappear */
+      return;
+    }
+    else if (!IN_LEV_FIELD(newx, newy) || !IS_FREE(newx, newy))
+    {
+      /* object was running against a wall */
+
+      TurnRound(x, y);
+
+#if 1
+      DrawLevelElementAnimation(x, y, element);
+#else
+      if (element == EL_BUG ||
+	  element == EL_SPACESHIP ||
+	  element == EL_SP_SNIKSNAK)
+	DrawLevelField(x, y);
+      else if (element == EL_MOLE)
+	DrawLevelField(x, y);
+      else if (element == EL_BD_BUTTERFLY ||
+	       element == EL_BD_FIREFLY)
+	DrawLevelElementAnimationIfNeeded(x, y, element);
+      else if (element == EL_SATELLITE)
+	DrawLevelElementAnimationIfNeeded(x, y, element);
+      else if (element == EL_SP_ELECTRON)
+	DrawLevelElementAnimationIfNeeded(x, y, element);
+#endif
+
+      if (DONT_TOUCH(element))
+	TestIfBadThingTouchesHero(x, y);
+
+#if 0
+      PlaySoundLevelAction(x, y, ACTION_WAITING);
+#endif
+
+      return;
+    }
+
+    InitMovingField(x, y, MovDir[x][y]);
+
+    PlaySoundLevelAction(x, y, ACTION_MOVING);
+  }
+
+  if (MovDir[x][y])
+    ContinueMoving(x, y);
+}
+
+void ContinueMoving(int x, int y)
+{
+  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 newx = x + dx, newy = y + dy;
+  int nextx = newx + dx, nexty = newy + dy;
+  int horiz_move = (dx != 0);
+  int sign = (horiz_move ? dx : dy);
+  int step = sign * element_info[element].move_stepsize;
+  boolean pushed = Pushed[x][y];
+
+  /* special values for move stepsize for spring and things on conveyor belt */
+  if (horiz_move)
+  {
+    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;
+  }
+
+  MovPos[x][y] += step;
+
+  if (pushed)		/* special case: moving object pushed by player */
+    MovPos[x][y] = SIGN(MovPos[x][y]) * (TILEX - ABS(PLAYERINFO(x,y)->MovPos));
+
+  if (ABS(MovPos[x][y]) >= TILEX)	/* object reached its destination */
+  {
+    Feld[x][y] = EL_EMPTY;
+    Feld[newx][newy] = element;
+    MovPos[x][y] = 0;	/* force "not moving" for "crumbled sand" */
+
+    if (element == EL_MOLE)
+    {
+      Feld[x][y] = EL_SAND;
+
+      DrawLevelFieldCrumbledSandNeighbours(x, y);
+    }
+    else if (element == EL_QUICKSAND_FILLING)
+    {
+      element = Feld[newx][newy] = get_next_element(element);
+      Store[newx][newy] = Store[x][y];
+    }
+    else if (element == EL_QUICKSAND_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);
+      if (!game.magic_wall_active)
+	element = Feld[newx][newy] = EL_MAGIC_WALL_DEAD;
+      Store[newx][newy] = Store[x][y];
+    }
+    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];
+    }
+    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_BD_MAGIC_WALL_DEAD;
+      element = Feld[newx][newy] = Store[x][y];
+    }
+    else if (element == EL_AMOEBA_DROPPING)
+    {
+      Feld[x][y] = get_next_element(element);
+      element = Feld[newx][newy] = Store[x][y];
+    }
+    else if (element == EL_SOKOBAN_OBJECT)
+    {
+      if (Back[x][y])
+	Feld[x][y] = Back[x][y];
+
+      if (Back[newx][newy])
+	Feld[newx][newy] = EL_SOKOBAN_FIELD_FULL;
+
+      Back[x][y] = Back[newx][newy] = 0;
+    }
+    else if (Store[x][y] == EL_ACID)
+    {
+      element = Feld[newx][newy] = EL_ACID;
+    }
+
+    Store[x][y] = 0;
+    MovPos[x][y] = MovDir[x][y] = MovDelay[x][y] = 0;
+    MovDelay[newx][newy] = 0;
+
+    /* copy element change control values to new field */
+    ChangeDelay[newx][newy] = ChangeDelay[x][y];
+
+    /* copy animation control values to new field */
+    GfxFrame[newx][newy]  = GfxFrame[x][y];
+    GfxAction[newx][newy] = GfxAction[x][y];	/* keep action one frame */
+    GfxRandom[newx][newy] = GfxRandom[x][y];	/* keep same random value */
+
+    Pushed[x][y] = Pushed[newx][newy] = FALSE;
+
+    ResetGfxAnimation(x, y);	/* reset animation values for old field */
+
+#if 0
+    /* 2.1.1 (does not work correctly for spring) */
+    if (!CAN_MOVE(element))
+      MovDir[newx][newy] = 0;
+#else
+
+#if 0
+    /* (does not work for falling objects that slide horizontally) */
+    if (CAN_FALL(element) && MovDir[newx][newy] == MV_DOWN)
+      MovDir[newx][newy] = 0;
+#else
+    /*
+    if (!CAN_MOVE(element) ||
+	(element == EL_SPRING && MovDir[newx][newy] == MV_DOWN))
+      MovDir[newx][newy] = 0;
+    */
+
+    if (!CAN_MOVE(element) ||
+	(CAN_FALL(element) && MovDir[newx][newy] == MV_DOWN))
+      MovDir[newx][newy] = 0;
+#endif
+#endif
+
+    DrawLevelField(x, y);
+    DrawLevelField(newx, newy);
+
+    Stop[newx][newy] = TRUE;	/* ignore this element until the next frame */
+
+    if (!pushed)	/* special case: moving object pushed by player */
+      JustStopped[newx][newy] = 3;
+
+    if (DONT_TOUCH(element))	/* object may be nasty to player or others */
+    {
+      TestIfBadThingTouchesHero(newx, newy);
+      TestIfBadThingTouchesFriend(newx, newy);
+      TestIfBadThingTouchesOtherBadThing(newx, newy);
+    }
+    else if (element == EL_PENGUIN)
+      TestIfFriendTouchesBadThing(newx, newy);
+
+    if (CAN_FALL(element) && direction == MV_DOWN &&
+	(newy == lev_fieldy - 1 || !IS_FREE(x, newy + 1)))
+      Impact(x, newy);
+
+    if (!IN_LEV_FIELD(nextx, nexty) || !IS_FREE(nextx, nexty))
+      CheckElementChange(newx, newy, element, CE_COLLISION);
+
+    TestIfPlayerTouchesCustomElement(newx, newy);
+    TestIfElementTouchesCustomElement(newx, newy);
+  }
+  else				/* still moving on */
+  {
+    DrawLevelField(x, y);
+  }
+}
+
+int AmoebeNachbarNr(int ax, int ay)
+{
+  int i;
+  int element = Feld[ax][ay];
+  int group_nr = 0;
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+
+  for (i=0; i<4; i++)
+  {
+    int x = ax + xy[i][0];
+    int y = ay + xy[i][1];
+
+    if (!IN_LEV_FIELD(x, y))
+      continue;
+
+    if (Feld[x][y] == element && AmoebaNr[x][y] > 0)
+      group_nr = AmoebaNr[x][y];
+  }
+
+  return group_nr;
+}
+
+void AmoebenVereinigen(int ax, int ay)
+{
+  int i, x, y, xx, yy;
+  int new_group_nr = AmoebaNr[ax][ay];
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+
+  if (new_group_nr == 0)
+    return;
+
+  for (i=0; i<4; i++)
+  {
+    x = ax + xy[i][0];
+    y = ay + xy[i][1];
+
+    if (!IN_LEV_FIELD(x, y))
+      continue;
+
+    if ((Feld[x][y] == EL_AMOEBA_FULL ||
+	 Feld[x][y] == EL_BD_AMOEBA ||
+	 Feld[x][y] == EL_AMOEBA_DEAD) &&
+	AmoebaNr[x][y] != new_group_nr)
+    {
+      int old_group_nr = AmoebaNr[x][y];
+
+      if (old_group_nr == 0)
+	return;
+
+      AmoebaCnt[new_group_nr] += AmoebaCnt[old_group_nr];
+      AmoebaCnt[old_group_nr] = 0;
+      AmoebaCnt2[new_group_nr] += AmoebaCnt2[old_group_nr];
+      AmoebaCnt2[old_group_nr] = 0;
+
+      for (yy=0; yy<lev_fieldy; yy++)
+      {
+	for (xx=0; xx<lev_fieldx; xx++)
+	{
+	  if (AmoebaNr[xx][yy] == old_group_nr)
+	    AmoebaNr[xx][yy] = new_group_nr;
+	}
+      }
+    }
+  }
+}
+
+void AmoebeUmwandeln(int ax, int ay)
+{
+  int i, x, y;
+
+  if (Feld[ax][ay] == EL_AMOEBA_DEAD)
+  {
+    int group_nr = AmoebaNr[ax][ay];
+
+#ifdef DEBUG
+    if (group_nr == 0)
+    {
+      printf("AmoebeUmwandeln(): ax = %d, ay = %d\n", ax, ay);
+      printf("AmoebeUmwandeln(): This should never happen!\n");
+      return;
+    }
+#endif
+
+    for (y=0; y<lev_fieldy; y++)
+    {
+      for (x=0; x<lev_fieldx; x++)
+      {
+	if (Feld[x][y] == EL_AMOEBA_DEAD && AmoebaNr[x][y] == group_nr)
+	{
+	  AmoebaNr[x][y] = 0;
+	  Feld[x][y] = EL_AMOEBA_TO_DIAMOND;
+	}
+      }
+    }
+    PlaySoundLevel(ax, ay, (IS_GEM(level.amoeba_content) ?
+			    SND_AMOEBA_TURNING_TO_GEM :
+			    SND_AMOEBA_TURNING_TO_ROCK));
+    Bang(ax, ay);
+  }
+  else
+  {
+    static int xy[4][2] =
+    {
+      { 0, -1 },
+      { -1, 0 },
+      { +1, 0 },
+      { 0, +1 }
+    };
+
+    for (i=0; i<4; i++)
+    {
+      x = ax + xy[i][0];
+      y = ay + xy[i][1];
+
+      if (!IN_LEV_FIELD(x, y))
+	continue;
+
+      if (Feld[x][y] == EL_AMOEBA_TO_DIAMOND)
+      {
+	PlaySoundLevel(x, y, (IS_GEM(level.amoeba_content) ?
+			      SND_AMOEBA_TURNING_TO_GEM :
+			      SND_AMOEBA_TURNING_TO_ROCK));
+	Bang(x, y);
+      }
+    }
+  }
+}
+
+void AmoebeUmwandelnBD(int ax, int ay, int new_element)
+{
+  int x, y;
+  int group_nr = AmoebaNr[ax][ay];
+  boolean done = FALSE;
+
+#ifdef DEBUG
+  if (group_nr == 0)
+  {
+    printf("AmoebeUmwandelnBD(): ax = %d, ay = %d\n", ax, ay);
+    printf("AmoebeUmwandelnBD(): This should never happen!\n");
+    return;
+  }
+#endif
+
+  for (y=0; y<lev_fieldy; 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))
+      {
+	AmoebaNr[x][y] = 0;
+	Feld[x][y] = new_element;
+	InitField(x, y, FALSE);
+	DrawLevelField(x, y);
+	done = TRUE;
+      }
+    }
+  }
+
+  if (done)
+    PlaySoundLevel(ax, ay, (new_element == EL_BD_ROCK ?
+			    SND_BD_AMOEBA_TURNING_TO_ROCK :
+			    SND_BD_AMOEBA_TURNING_TO_GEM));
+}
+
+void AmoebeWaechst(int x, int y)
+{
+  static unsigned long sound_delay = 0;
+  static unsigned long sound_delay_value = 0;
+
+  if (!MovDelay[x][y])		/* start new growing cycle */
+  {
+    MovDelay[x][y] = 7;
+
+    if (DelayReached(&sound_delay, sound_delay_value))
+    {
+#if 1
+      PlaySoundLevelElementAction(x, y, Store[x][y], ACTION_GROWING);
+#else
+      if (Store[x][y] == EL_BD_AMOEBA)
+	PlaySoundLevel(x, y, SND_BD_AMOEBA_GROWING);
+      else
+	PlaySoundLevel(x, y, SND_AMOEBA_GROWING);
+#endif
+      sound_delay_value = 30;
+    }
+  }
+
+  if (MovDelay[x][y])		/* wait some time before growing bigger */
+  {
+    MovDelay[x][y]--;
+    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+    {
+      int frame = getGraphicAnimationFrame(IMG_AMOEBA_GROWING,
+					   6 - MovDelay[x][y]);
+
+      DrawGraphic(SCREENX(x), SCREENY(y), IMG_AMOEBA_GROWING, frame);
+    }
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = Store[x][y];
+      Store[x][y] = 0;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void AmoebaDisappearing(int x, int y)
+{
+  static unsigned long sound_delay = 0;
+  static unsigned long sound_delay_value = 0;
+
+  if (!MovDelay[x][y])		/* start new shrinking cycle */
+  {
+    MovDelay[x][y] = 7;
+
+    if (DelayReached(&sound_delay, sound_delay_value))
+      sound_delay_value = 30;
+  }
+
+  if (MovDelay[x][y])		/* wait some time before shrinking */
+  {
+    MovDelay[x][y]--;
+    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+    {
+      int frame = getGraphicAnimationFrame(IMG_AMOEBA_SHRINKING,
+					   6 - MovDelay[x][y]);
+
+      DrawGraphic(SCREENX(x), SCREENY(y), IMG_AMOEBA_SHRINKING, frame);
+    }
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_EMPTY;
+      DrawLevelField(x, y);
+
+      /* don't let mole enter this field in this cycle;
+	 (give priority to objects falling to this field from above) */
+      Stop[x][y] = TRUE;
+    }
+  }
+}
+
+void AmoebeAbleger(int ax, int ay)
+{
+  int i;
+  int element = Feld[ax][ay];
+  int graphic = el2img(element);
+  int newax = ax, neway = ay;
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+
+  if (!level.amoeba_speed)
+  {
+    Feld[ax][ay] = EL_AMOEBA_DEAD;
+    DrawLevelField(ax, ay);
+    return;
+  }
+
+  if (IS_ANIMATED(graphic))
+    DrawLevelGraphicAnimationIfNeeded(ax, ay, graphic);
+
+  if (!MovDelay[ax][ay])	/* start making new amoeba field */
+    MovDelay[ax][ay] = RND(FRAMES_PER_SECOND * 25 / (1 + level.amoeba_speed));
+
+  if (MovDelay[ax][ay])		/* wait some time before making new amoeba */
+  {
+    MovDelay[ax][ay]--;
+    if (MovDelay[ax][ay])
+      return;
+  }
+
+  if (element == EL_AMOEBA_WET)	/* object is an acid / amoeba drop */
+  {
+    int start = RND(4);
+    int x = ax + xy[start][0];
+    int y = ay + xy[start][1];
+
+    if (!IN_LEV_FIELD(x, y))
+      return;
+
+    if (IS_FREE(x, y) ||
+	Feld[x][y] == EL_SAND || Feld[x][y] == EL_QUICKSAND_EMPTY)
+    {
+      newax = x;
+      neway = y;
+    }
+
+    if (newax == ax && neway == ay)
+      return;
+  }
+  else				/* normal or "filled" (BD style) amoeba */
+  {
+    int start = RND(4);
+    boolean waiting_for_player = FALSE;
+
+    for (i=0; i<4; i++)
+    {
+      int j = (start + i) % 4;
+      int x = ax + xy[j][0];
+      int y = ay + xy[j][1];
+
+      if (!IN_LEV_FIELD(x, y))
+	continue;
+
+      if (IS_FREE(x, y) ||
+	  Feld[x][y] == EL_SAND || Feld[x][y] == EL_QUICKSAND_EMPTY)
+      {
+	newax = x;
+	neway = y;
+	break;
+      }
+      else if (IS_PLAYER(x, y))
+	waiting_for_player = TRUE;
+    }
+
+    if (newax == ax && neway == ay)		/* amoeba cannot grow */
+    {
+      if (i == 4 && (!waiting_for_player || game.emulation == EMU_BOULDERDASH))
+      {
+	Feld[ax][ay] = EL_AMOEBA_DEAD;
+	DrawLevelField(ax, ay);
+	AmoebaCnt[AmoebaNr[ax][ay]]--;
+
+	if (AmoebaCnt[AmoebaNr[ax][ay]] <= 0)	/* amoeba is completely dead */
+	{
+	  if (element == EL_AMOEBA_FULL)
+	    AmoebeUmwandeln(ax, ay);
+	  else if (element == EL_BD_AMOEBA)
+	    AmoebeUmwandelnBD(ax, ay, level.amoeba_content);
+	}
+      }
+      return;
+    }
+    else if (element == EL_AMOEBA_FULL || element == EL_BD_AMOEBA)
+    {
+      /* amoeba gets larger by growing in some direction */
+
+      int new_group_nr = AmoebaNr[ax][ay];
+
+#ifdef DEBUG
+  if (new_group_nr == 0)
+  {
+    printf("AmoebeAbleger(): newax = %d, neway = %d\n", newax, neway);
+    printf("AmoebeAbleger(): This should never happen!\n");
+    return;
+  }
+#endif
+
+      AmoebaNr[newax][neway] = new_group_nr;
+      AmoebaCnt[new_group_nr]++;
+      AmoebaCnt2[new_group_nr]++;
+
+      /* if amoeba touches other amoeba(s) after growing, unify them */
+      AmoebenVereinigen(newax, neway);
+
+      if (element == EL_BD_AMOEBA && AmoebaCnt2[new_group_nr] >= 200)
+      {
+	AmoebeUmwandelnBD(newax, neway, EL_BD_ROCK);
+	return;
+      }
+    }
+  }
+
+  if (element != EL_AMOEBA_WET || 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)
+  {
+    Feld[newax][neway] = EL_AMOEBA_DROP;	/* drop left/right of amoeba */
+#if 1
+    PlaySoundLevelAction(newax, neway, ACTION_GROWING);
+#else
+    PlaySoundLevel(newax, neway, SND_AMOEBA_GROWING);
+#endif
+  }
+  else
+  {
+    InitMovingField(ax, ay, MV_DOWN);		/* drop dripping from amoeba */
+    Feld[ax][ay] = EL_AMOEBA_DROPPING;
+    Store[ax][ay] = EL_AMOEBA_DROP;
+    ContinueMoving(ax, ay);
+    return;
+  }
+
+  DrawLevelField(newax, neway);
+}
+
+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);
+  boolean changed = FALSE;
+
+  if (IS_ANIMATED(graphic))
+    DrawLevelGraphicAnimationIfNeeded(ax, ay, graphic);
+
+  if (Stop[ax][ay])
+    return;
+
+  if (!MovDelay[ax][ay])	/* start new "game of life" cycle */
+    MovDelay[ax][ay] = life_time;
+
+  if (MovDelay[ax][ay])		/* wait some time before next cycle */
+  {
+    MovDelay[ax][ay]--;
+    if (MovDelay[ax][ay])
+      return;
+  }
+
+  for (y1=-1; y1<2; y1++) for(x1=-1; x1<2; x1++)
+  {
+    int xx = ax+x1, yy = ay+y1;
+    int nachbarn = 0;
+
+    if (!IN_LEV_FIELD(xx, yy))
+      continue;
+
+    for (y2=-1; y2<2; y2++) for (x2=-1; x2<2; x2++)
+    {
+      int x = xx+x2, y = yy+y2;
+
+      if (!IN_LEV_FIELD(x, y) || (x == xx && y == yy))
+	continue;
+
+      if (((Feld[x][y] == element ||
+	    (element == EL_GAME_OF_LIFE && IS_PLAYER(x, y))) &&
+	   !Stop[x][y]) ||
+	  (IS_FREE(x, y) && Stop[x][y]))
+	nachbarn++;
+    }
+
+    if (xx == ax && yy == ay)		/* field in the middle */
+    {
+      if (nachbarn < life[0] || nachbarn > life[1])
+      {
+	Feld[xx][yy] = EL_EMPTY;
+	if (!Stop[xx][yy])
+	  DrawLevelField(xx, yy);
+	Stop[xx][yy] = TRUE;
+	changed = TRUE;
+      }
+    }
+    else if (IS_FREE(xx, yy) || Feld[xx][yy] == EL_SAND)
+    {					/* free border field */
+      if (nachbarn >= life[2] && nachbarn <= life[3])
+      {
+	Feld[xx][yy] = element;
+	MovDelay[xx][yy] = (element == EL_GAME_OF_LIFE ? 0 : life_time-1);
+	if (!Stop[xx][yy])
+	  DrawLevelField(xx, yy);
+	Stop[xx][yy] = TRUE;
+	changed = TRUE;
+      }
+    }
+  }
+
+  if (changed)
+    PlaySoundLevel(ax, ay, element == EL_BIOMAZE ? SND_BIOMAZE_GROWING :
+		   SND_GAME_OF_LIFE_GROWING);
+}
+
+static void InitRobotWheel(int x, int y)
+{
+  ChangeDelay[x][y] = level.time_wheel * FRAMES_PER_SECOND;
+}
+
+static void RunRobotWheel(int x, int y)
+{
+  PlaySoundLevel(x, y, SND_ROBOT_WHEEL_ACTIVE);
+}
+
+static void StopRobotWheel(int x, int y)
+{
+  if (ZX == x && ZY == y)
+    ZX = ZY = -1;
+}
+
+static void InitTimegateWheel(int x, int y)
+{
+  ChangeDelay[x][y] = level.time_wheel * FRAMES_PER_SECOND;
+}
+
+static void RunTimegateWheel(int x, int y)
+{
+  PlaySoundLevel(x, y, SND_TIMEGATE_SWITCH_ACTIVE);
+}
+
+void CheckExit(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;
+  }
+
+  Feld[x][y] = EL_EXIT_OPENING;
+
+  PlaySoundLevelNearest(x, y, SND_CLASS_EXIT_OPENING);
+}
+
+void CheckExitSP(int x, int y)
+{
+  if (local_player->gems_still_needed > 0)
+  {
+    int element = Feld[x][y];
+    int graphic = el2img(element);
 
-    MovDelay[x][y] = 6+RND(40);
+    if (IS_ANIMATED(graphic))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+    return;
   }
-  else if (element==EL_SCHWEIN)
+
+  Feld[x][y] = EL_SP_EXIT_OPEN;
+
+  PlaySoundLevelNearest(x, y, SND_CLASS_SP_EXIT_OPENING);
+}
+
+static void CloseAllOpenTimegates()
+{
+  int x, y;
+
+  for (y=0; y<lev_fieldy; y++)
   {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
-    BOOL should_turn_left = FALSE, should_turn_right = FALSE;
-    BOOL should_move_on = FALSE;
-    int rnd_value = 24;
-    int rnd = RND(rnd_value);
+    for (x=0; x<lev_fieldx; x++)
+    {
+      int element = Feld[x][y];
+
+      if (element == EL_TIMEGATE_OPEN || element == EL_TIMEGATE_OPENING)
+      {
+	Feld[x][y] = EL_TIMEGATE_CLOSING;
+#if 1
+	PlaySoundLevelAction(x, y, ACTION_CLOSING);
+#else
+	PlaySoundLevel(x, y, SND_TIMEGATE_CLOSING);
+#endif
+      }
+    }
+  }
+}
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	(IS_FREE(left_x,left_y) || IS_GEM(Feld[left_x][left_y])))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x,right_y) &&
-	(IS_FREE(right_x,right_y) || IS_GEM(Feld[right_x][right_y])))
-      can_turn_right = TRUE;
-    if (IN_LEV_FIELD(move_x,move_y) &&
-	(IS_FREE(move_x,move_y) || IS_GEM(Feld[move_x][move_y])))
-      can_move_on = TRUE;
-
-    if (can_turn_left &&
-	(!can_move_on ||
-	 (IN_LEV_FIELD(x+back_dx+left_dx,y+back_dy+left_dy) &&
-	  !IS_FREE(x+back_dx+left_dx,y+back_dy+left_dy))))
-      should_turn_left = TRUE;
-    if (can_turn_right &&
-	(!can_move_on ||
-	 (IN_LEV_FIELD(x+back_dx+right_dx,y+back_dy+right_dy) &&
-	  !IS_FREE(x+back_dx+right_dx,y+back_dy+right_dy))))
-      should_turn_right = TRUE;
-    if (can_move_on &&
-	(!can_turn_left || !can_turn_right ||
-	 (IN_LEV_FIELD(x+move_dx+left_dx,y+move_dy+left_dy) &&
-	  !IS_FREE(x+move_dx+left_dx,y+move_dy+left_dy)) ||
-	 (IN_LEV_FIELD(x+move_dx+right_dx,y+move_dy+right_dy) &&
-	  !IS_FREE(x+move_dx+right_dx,y+move_dy+right_dy))))
-      should_move_on = TRUE;
+void EdelsteinFunkeln(int x, int y)
+{
+  if (!IN_SCR_FIELD(SCREENX(x), SCREENY(y)) || IS_MOVING(x, y))
+    return;
 
-    if (should_turn_left || should_turn_right || should_move_on)
+  if (Feld[x][y] == EL_BD_DIAMOND)
+    return;
+
+  if (MovDelay[x][y] == 0)	/* next animation frame */
+    MovDelay[x][y] = 11 * !SimpleRND(500);
+
+  if (MovDelay[x][y] != 0)	/* wait some time before next frame */
+  {
+    MovDelay[x][y]--;
+
+    if (setup.direct_draw && MovDelay[x][y])
+      SetDrawtoField(DRAW_BUFFERED);
+
+    DrawLevelElementAnimation(x, y, Feld[x][y]);
+
+    if (MovDelay[x][y] != 0)
     {
-      if (should_turn_left && should_turn_right && should_move_on)
-	MovDir[x][y] = (rnd < rnd_value/3 ? left_dir :
-			rnd < 2*rnd_value/3 ? right_dir :
-			old_move_dir);
-      else if (should_turn_left && should_turn_right)
-	MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : right_dir);
-      else if (should_turn_left && should_move_on)
-	MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : old_move_dir);
-      else if (should_turn_right && should_move_on)
-	MovDir[x][y] = (rnd < rnd_value/2 ? right_dir : old_move_dir);
-      else if (should_turn_left)
-	MovDir[x][y] = left_dir;
-      else if (should_turn_right)
-	MovDir[x][y] = right_dir;
-      else if (should_move_on)
-	MovDir[x][y] = old_move_dir;
+      int frame = getGraphicAnimationFrame(IMG_TWINKLE_WHITE,
+					   10 - MovDelay[x][y]);
+
+      DrawGraphicThruMask(SCREENX(x), SCREENY(y), IMG_TWINKLE_WHITE, frame);
+
+      if (setup.direct_draw)
+      {
+	int dest_x, dest_y;
+
+	dest_x = FX + SCREENX(x) * TILEX;
+	dest_y = FY + SCREENY(y) * TILEY;
+
+	BlitBitmap(drawto_field, window,
+		   dest_x, dest_y, TILEX, TILEY, dest_x, dest_y);
+	SetDrawtoField(DRAW_DIRECT);
+      }
+    }
+  }
+}
+
+void MauerWaechst(int x, int y)
+{
+  int delay = 6;
+
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 3 * delay;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    MovDelay[x][y]--;
+
+    if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+    {
+      int graphic = el_dir2img(Feld[x][y], MovDir[x][y]);
+      int frame = getGraphicAnimationFrame(graphic, 17 - MovDelay[x][y]);
+
+      DrawGraphic(SCREENX(x), SCREENY(y), graphic, frame);
+    }
+
+    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;
+      MovDir[x][y] = MV_NO_MOVING;
+      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;
+      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;
+      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)
+  {
+    if (links_frei)
+    {
+      Feld[ax-1][ay] = EL_EXPANDABLE_WALL_GROWING;
+      Store[ax-1][ay] = element;
+      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)
+    {
+      Feld[ax+1][ay] = EL_EXPANDABLE_WALL_GROWING;
+      Store[ax+1][ay] = element;
+      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)
+#if 1
+    PlaySoundLevelAction(ax, ay, ACTION_GROWING);
+#else
+    PlaySoundLevel(ax, ay, SND_EXPANDABLE_WALL_GROWING);
+#endif
+}
+
+void CheckForDragon(int x, int y)
+{
+  int i, j;
+  boolean dragon_found = FALSE;
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+
+  for (i=0; i<4; i++)
+  {
+    for (j=0; j<4; j++)
+    {
+      int xx = x + j*xy[i][0], yy = y + j*xy[i][1];
+
+      if (IN_LEV_FIELD(xx, yy) &&
+	  (Feld[xx][yy] == EL_FLAMES || Feld[xx][yy] == EL_DRAGON))
+      {
+	if (Feld[xx][yy] == EL_DRAGON)
+	  dragon_found = TRUE;
+      }
+      else
+	break;
+    }
+  }
+
+  if (!dragon_found)
+  {
+    for (i=0; i<4; i++)
+    {
+      for (j=0; j<3; j++)
+      {
+  	int xx = x + j*xy[i][0], yy = y + j*xy[i][1];
+  
+  	if (IN_LEV_FIELD(xx, yy) && Feld[xx][yy] == EL_FLAMES)
+  	{
+	  Feld[xx][yy] = EL_EMPTY;
+	  DrawLevelField(xx, yy);
+  	}
+  	else
+  	  break;
+      }
+    }
+  }
+}
+
+static void InitBuggyBase(int x, int y)
+{
+  int element = Feld[x][y];
+  int activating_delay = FRAMES_PER_SECOND / 4;
+
+  ChangeDelay[x][y] =
+    (element == EL_SP_BUGGY_BASE ?
+     2 * FRAMES_PER_SECOND + RND(5 * FRAMES_PER_SECOND) - activating_delay :
+     element == EL_SP_BUGGY_BASE_ACTIVATING ?
+     activating_delay :
+     element == EL_SP_BUGGY_BASE_ACTIVE ?
+     1 * FRAMES_PER_SECOND + RND(1 * FRAMES_PER_SECOND) : 1);
+}
+
+static void WarnBuggyBase(int x, int y)
+{
+  int i;
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+
+  for (i=0; i<4; i++)
+  {
+    int xx = x + xy[i][0], yy = y + xy[i][1];
+
+    if (IS_PLAYER(xx, yy))
+    {
+      PlaySoundLevel(x, y, SND_SP_BUGGY_BASE_ACTIVE);
+
+      break;
+    }
+  }
+}
+
+static void InitTrap(int x, int y)
+{
+  ChangeDelay[x][y] = 2 * FRAMES_PER_SECOND + RND(5 * FRAMES_PER_SECOND);
+}
+
+static void ActivateTrap(int x, int y)
+{
+  PlaySoundLevel(x, y, SND_TRAP_ACTIVATING);
+}
+
+static void ChangeActiveTrap(int x, int y)
+{
+  int graphic = IMG_TRAP_ACTIVE;
+
+  /* if new animation frame was drawn, correct crumbled sand border */
+  if (IS_NEW_FRAME(GfxFrame[x][y], graphic))
+    DrawLevelFieldCrumbledSand(x, y);
+}
+
+static void ChangeElementNowExt(int x, int y, int target_element)
+{
+  if (IS_PLAYER(x, y) && !IS_ACCESSIBLE(target_element))
+  {
+    Bang(x, y);
+    return;
+  }
+
+  RemoveField(x, y);
+  Feld[x][y] = target_element;
+
+  ResetGfxAnimation(x, y);
+  ResetRandomAnimationValue(x, y);
+
+  InitField(x, y, FALSE);
+  if (CAN_MOVE(Feld[x][y]))
+    InitMovDir(x, y);
+
+  DrawLevelField(x, y);
+
+  if (CAN_BE_CRUMBLED(Feld[x][y]))
+    DrawLevelFieldCrumbledSandNeighbours(x, y);
+}
+
+static void ChangeElementNow(int x, int y, int element)
+{
+  struct ElementChangeInfo *change = &element_info[element].change;
+
+  CheckTriggeredElementChange(x, y, Feld[x][y], CE_OTHER_IS_CHANGING);
+
+  if (change->explode)
+  {
+    Bang(x, y);
+    return;
+  }
+
+  if (change->use_content)
+  {
+    boolean complete_change = TRUE;
+    boolean can_change[3][3];
+    int xx, yy;
+
+    for (yy = 0; yy < 3; yy++) for(xx = 0; xx < 3 ; xx++)
+    {
+      boolean half_destructible;
+      int ex = x + xx - 1;
+      int ey = y + yy - 1;
+      int e;
+
+      can_change[xx][yy] = TRUE;
+
+      if (ex == x && ey == y)	/* do not check changing element itself */
+	continue;
+
+      if (change->content[xx][yy] == EL_EMPTY_SPACE)
+      {
+	can_change[xx][yy] = FALSE;	/* do not change empty borders */
+
+	continue;
+      }
+
+      if (!IN_LEV_FIELD(ex, ey))
+      {
+	can_change[xx][yy] = FALSE;
+	complete_change = FALSE;
+
+	continue;
+      }
+
+      e = Feld[ex][ey];
+
+      half_destructible = (IS_FREE(ex, ey) || IS_DIGGABLE(e));
+
+      if ((change->power <= CP_NON_DESTRUCTIVE  && !IS_FREE(ex, ey)) ||
+	  (change->power <= CP_HALF_DESTRUCTIVE && !half_destructible) ||
+	  (change->power <= CP_FULL_DESTRUCTIVE && IS_INDESTRUCTIBLE(e)))
+      {
+	can_change[xx][yy] = FALSE;
+	complete_change = FALSE;
+      }
+    }
+
+    if (!change->only_complete || complete_change)
+    {
+      if (change->only_complete && change->use_random_change &&
+	  RND(change->random) != 0)
+	return;
+
+      for (yy = 0; yy < 3; yy++) for(xx = 0; xx < 3 ; xx++)
+      {
+	int ex = x + xx - 1;
+	int ey = y + yy - 1;
+
+	if (can_change[xx][yy] && (!change->use_random_change ||
+				   RND(change->random) == 0))
+	{
+	  ChangeElementNowExt(ex, ey, change->content[xx][yy]);
+
+	  /* for symmetry reasons, stop newly created border elements */
+	  if (ex != x || ey != y)
+	    Stop[ex][ey] = TRUE;
+	}
+      }
+
+      return;
+    }
+  }
+
+  ChangeElementNowExt(x, y, change->target_element);
+}
+
+static void ChangeElement(int x, int y)
+{
+#if 1
+  int element = MovingOrBlocked2Element(x, y);
+#else
+  int element = Feld[x][y];
+#endif
+  struct ElementChangeInfo *change = &element_info[element].change;
+
+  if (ChangeDelay[x][y] == 0)		/* initialize element change */
+  {
+#if 1
+    ChangeDelay[x][y] = (    change->delay_fixed  * change->delay_frames +
+			 RND(change->delay_random * change->delay_frames)) + 1;
+#else
+    ChangeDelay[x][y] = changing_element[element].change_delay + 1;
+
+    if (IS_CUSTOM_ELEMENT(element) && HAS_CHANGE_EVENT(element, CE_DELAY))
+    {
+      int max_random_delay = element_info[element].change.delay_random;
+      int delay_frames = element_info[element].change.delay_frames;
+
+      ChangeDelay[x][y] += RND(max_random_delay * delay_frames);
     }
-    else if (can_move_on && rnd > rnd_value/8)
-      MovDir[x][y] = old_move_dir;
-    else if (can_turn_left && can_turn_right)
-      MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : right_dir);
-    else if (can_turn_left && rnd > rnd_value/8)
-      MovDir[x][y] = left_dir;
-    else if (can_turn_right && rnd > rnd_value/8)
-      MovDir[x][y] = right_dir;
-    else
-      MovDir[x][y] = back_dir;
+#endif
 
-    if (!IS_FREE(x+move_xy[MovDir[x][y]].x,y+move_xy[MovDir[x][y]].y) &&
-	!IS_GEM(Feld[x+move_xy[MovDir[x][y]].x][y+move_xy[MovDir[x][y]].y]))
-      MovDir[x][y] = old_move_dir;
+    ResetGfxAnimation(x, y);
+    ResetRandomAnimationValue(x, y);
 
-    MovDelay[x][y] = 0;
+#if 1
+    if (change->pre_change_function)
+      change->pre_change_function(x, y);
+#else
+    if (changing_element[element].pre_change_function)
+      changing_element[element].pre_change_function(x, y);
+#endif
   }
-  else if (element==EL_DRACHE)
-  {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
-    int rnd_value = 24;
-    int rnd = RND(rnd_value);
 
-    if (IN_LEV_FIELD(left_x,left_y) && IS_FREE(left_x,left_y))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x,right_y) && IS_FREE(right_x,right_y))
-      can_turn_right = TRUE;
-    if (IN_LEV_FIELD(move_x,move_y) && IS_FREE(move_x,move_y))
-      can_move_on = TRUE;
+  ChangeDelay[x][y]--;
 
-    if (can_move_on && rnd > rnd_value/8)
-      MovDir[x][y] = old_move_dir;
-    else if (can_turn_left && can_turn_right)
-      MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : right_dir);
-    else if (can_turn_left && rnd > rnd_value/8)
-      MovDir[x][y] = left_dir;
-    else if (can_turn_right && rnd > rnd_value/8)
-      MovDir[x][y] = right_dir;
-    else
-      MovDir[x][y] = back_dir;
+  if (ChangeDelay[x][y] != 0)		/* continue element change */
+  {
+    int graphic = el_act_dir2img(element, GfxAction[x][y], MovDir[x][y]);
 
-    if (!IS_FREE(x+move_xy[MovDir[x][y]].x,y+move_xy[MovDir[x][y]].y))
-      MovDir[x][y] = old_move_dir;
+    if (IS_ANIMATED(graphic))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
 
-    MovDelay[x][y] = 0;
+#if 1
+    if (change->change_function)
+      change->change_function(x, y);
+#else
+    if (changing_element[element].change_function)
+      changing_element[element].change_function(x, y);
+#endif
   }
-  else if (element==EL_ROBOT || element==EL_SONDE ||
-	   element==EL_MAULWURF || element==EL_PINGUIN)
+  else					/* finish element change */
   {
-    int attr_x = JX, attr_y = JY;
-    int newx, newy;
+#if 0
+    int next_element = changing_element[element].next_element;
+#endif
 
-    if (PlayerGone)
+    if (IS_MOVING(x, y))		/* never change a running system ;-) */
     {
-      attr_x = ExitX;
-      attr_y = ExitY;
-    }
+      ChangeDelay[x][y] = 1;		/* try change after next move step */
 
-    if (element==EL_ROBOT && ZX>=0 && ZY>=0)
-    {
-      attr_x = ZX;
-      attr_y = ZY;
+      return;
     }
 
-    if (element==EL_MAULWURF || element==EL_PINGUIN)
-    {
-      int i;
-      static int xy[4][2] =
-      {
-	{ 0,-1 },
-	{ -1,0 },
-	{ +1,0 },
-	{ 0,+1 }
-      };
+#if 1
+    ChangeElementNow(x, y, element);
 
-      for(i=0;i<4;i++)
-      {
-    	int ex = x+xy[i%4][0];
-    	int ey = y+xy[i%4][1];
+    if (change->post_change_function)
+      change->post_change_function(x, y);
+#else
+    if (next_element != EL_UNDEFINED)
+      ChangeElementNow(x, y, next_element);
+    else
+      ChangeElementNow(x, y, element_info[element].change.target_element);
 
-    	if (IN_LEV_FIELD(ex,ey) && Feld[ex][ey] == EL_AUSGANG_AUF)
-	{
-	  attr_x = ex;
- 	  attr_y = ey;
-	  break;
-	}
-      }
-    }
+    if (changing_element[element].post_change_function)
+      changing_element[element].post_change_function(x, y);
+#endif
+  }
+}
 
-    MovDir[x][y] = MV_NO_MOVING;
-    if (attr_x<x)
-      MovDir[x][y] |= (GameOver ? MV_RIGHT : MV_LEFT);
-    else if (attr_x>x)
-      MovDir[x][y] |= (GameOver ? MV_LEFT : MV_RIGHT);
-    if (attr_y<y)
-      MovDir[x][y] |= (GameOver ? MV_DOWN : MV_UP);
-    else if (attr_y>y)
-      MovDir[x][y] |= (GameOver ? MV_UP : MV_DOWN);
-
-    if (element==EL_ROBOT)
-    {
-      if ((MovDir[x][y]&(MV_LEFT|MV_RIGHT)) && (MovDir[x][y]&(MV_UP|MV_DOWN)))
-	MovDir[x][y] &= (RND(2) ? (MV_LEFT|MV_RIGHT) : (MV_UP|MV_DOWN));
-      Moving2Blocked(x,y,&newx,&newy);
-
-      if (IN_LEV_FIELD(newx,newy) && IS_FREE_OR_PLAYER(newx,newy))
-	MovDelay[x][y] = 8+8*!RND(3);
-      else
-	MovDelay[x][y] = 16;
-    }
-    else
-    {
-      MovDelay[x][y] = 1;
+static boolean CheckTriggeredElementChange(int lx, int ly, int trigger_element,
+					   int trigger_event)
+{
+  int i, x, y;
 
-      if ((MovDir[x][y]&(MV_LEFT|MV_RIGHT)) && (MovDir[x][y]&(MV_UP|MV_DOWN)))
-      {
-	BOOL first_horiz = RND(2);
-	int new_move_dir = MovDir[x][y];
+  if (!(trigger_events[trigger_element] & CH_EVENT_BIT(trigger_event)))
+    return FALSE;
 
-	MovDir[x][y] =
-	  new_move_dir & (first_horiz ? (MV_LEFT|MV_RIGHT) : (MV_UP|MV_DOWN));
-	Moving2Blocked(x,y,&newx,&newy);
-
-	if (IN_LEV_FIELD(newx,newy) &&
-	    (IS_FREE(newx,newy) ||
-	     Feld[newx][newy] == EL_SALZSAEURE ||
-	     ((element == EL_MAULWURF || element==EL_PINGUIN) &&
-	      (Feld[newx][newy] == EL_AUSGANG_AUF ||
-	       IS_MAMPF3(Feld[newx][newy])))))
-	  return;
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+  {
+    if (!CAN_CHANGE(i) || !HAS_CHANGE_EVENT(i, trigger_event) ||
+	element_info[i].change.trigger_element != trigger_element)
+      continue;
 
-	MovDir[x][y] =
-	  new_move_dir & (!first_horiz ? (MV_LEFT|MV_RIGHT) : (MV_UP|MV_DOWN));
-	Moving2Blocked(x,y,&newx,&newy);
-
-	if (IN_LEV_FIELD(newx,newy) &&
-	    (IS_FREE(newx,newy) ||
-	     Feld[newx][newy] == EL_SALZSAEURE ||
-	     ((element == EL_MAULWURF || element==EL_PINGUIN) &&
-	      (Feld[newx][newy] == EL_AUSGANG_AUF ||
-	       IS_MAMPF3(Feld[newx][newy])))))
-	  return;
+    for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
+    {
+      if (x == lx && y == ly)	/* do not change trigger element itself */
+	continue;
 
-	MovDir[x][y] = old_move_dir;
-	return;
+      if (Feld[x][y] == i)
+      {
+	ChangeDelay[x][y] = 1;
+	ChangeElement(x, y);
       }
     }
   }
+
+  return TRUE;
 }
 
-void StartMoving(int x, int y)
+static boolean CheckElementChange(int x, int y, int element, int trigger_event)
 {
-  int element = Feld[x][y];
+  if (!CAN_CHANGE(element) || !HAS_CHANGE_EVENT(element, trigger_event))
+    return FALSE;
 
-  if (Stop[x][y])
+  if (Feld[x][y] == EL_BLOCKED)
+    Blocked2Moving(x, y, &x, &y);
+
+  ChangeDelay[x][y] = 1;
+  ChangeElement(x, y);
+
+  return TRUE;
+}
+
+static void PlayerActions(struct PlayerInfo *player, byte player_action)
+{
+  static byte stored_player_action[MAX_PLAYERS];
+  static int num_stored_actions = 0;
+  boolean moved = FALSE, snapped = FALSE, bombed = FALSE;
+  int left	= player_action & JOY_LEFT;
+  int right	= player_action & JOY_RIGHT;
+  int up	= player_action & JOY_UP;
+  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);
+
+  stored_player_action[player->index_nr] = 0;
+  num_stored_actions++;
+
+  if (!player->active || tape.pausing)
     return;
 
-  if (CAN_FALL(element) && y<lev_fieldy-1)
+  if (player_action)
   {
-    if (PlayerPushing && PlayerMovPos)
+    if (button1)
+      snapped = SnapField(player, dx, dy);
+    else
     {
-      int nextJX = JX + (JX - lastJX);
-      int nextJY = JY + (JY - lastJY);
-
-      if (x == nextJX && y == nextJY)
-	return;
+      if (button2)
+	bombed = PlaceBomb(player);
+      moved = MoveFigure(player, dx, dy);
     }
 
-    if (element==EL_MORAST_VOLL)
+    if (tape.single_step && tape.recording && !tape.pausing)
     {
-      if (IS_FREE(x,y+1))
+      if (button1 || (bombed && !moved))
       {
-	InitMovingField(x,y,MV_DOWN);
-	Feld[x][y] = EL_FELSBROCKEN;
-	Store[x][y] = EL_MORAST_LEER;
+	TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
+	SnapField(player, 0, 0);		/* stop snapping */
       }
-      else if (Feld[x][y+1]==EL_MORAST_LEER)
-      {
-	if (!MovDelay[x][y])
-	  MovDelay[x][y] = TILEY + 1;
+    }
 
-	if (MovDelay[x][y])
-	{
-	  MovDelay[x][y]--;
-	  if (MovDelay[x][y])
-	    return;
-	}
+    stored_player_action[player->index_nr] = player_action;
+  }
+  else
+  {
+    /* no actions for this player (no input at player's configured device) */
 
-	Feld[x][y] = EL_MORAST_LEER;
-	Feld[x][y+1] = EL_MORAST_VOLL;
-      }
+    DigField(player, 0, 0, 0, 0, DF_NO_PUSH);
+    SnapField(player, 0, 0);
+    CheckGravityMovement(player);
+
+    if (player->MovPos == 0)
+    {
+#if 0
+      printf("Trying... Player frame reset\n");
+#endif
+
+      InitPlayerGfxAnimation(player, ACTION_DEFAULT, player->MovDir);
     }
-    else if (element==EL_FELSBROCKEN && Feld[x][y+1]==EL_MORAST_LEER)
+
+    if (player->MovPos == 0)	/* needed for tape.playing */
+      player->is_moving = FALSE;
+  }
+
+  if (tape.recording && num_stored_actions >= MAX_PLAYERS)
+  {
+    TapeRecordAction(stored_player_action);
+    num_stored_actions = 0;
+  }
+}
+
+void GameActions()
+{
+  static unsigned long action_delay = 0;
+  unsigned long action_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;
+
+  if (game_status != GAME_MODE_PLAYING)
+    return;
+
+  action_delay_value =
+    (tape.playing && tape.fast_forward ? FfwdFrameDelay : GameFrameDelay);
+
+  if (tape.playing && tape.index_search && !tape.pausing)
+    action_delay_value = 0;
+
+  /* ---------- main game synchronization point ---------- */
+
+  WaitUntilDelayReached(&action_delay, action_delay_value);
+
+  if (network_playing && !network_player_action_received)
+  {
+    /*
+#ifdef DEBUG
+    printf("DEBUG: try to get network player actions in time\n");
+#endif
+    */
+
+#if defined(PLATFORM_UNIX)
+    /* last chance to get network player actions without main loop delay */
+    HandleNetworking();
+#endif
+
+    if (game_status != GAME_MODE_PLAYING)
+      return;
+
+    if (!network_player_action_received)
     {
-      InitMovingField(x,y,MV_DOWN);
-      Store[x][y] = EL_MORAST_VOLL;
+      /*
+#ifdef DEBUG
+      printf("DEBUG: failed to get network player actions in time\n");
+#endif
+      */
+      return;
     }
-    else if (element==EL_SIEB_VOLL)
+  }
+
+  if (tape.pausing)
+    return;
+
+  recorded_player_action = (tape.playing ? TapePlayAction() : NULL);
+
+  for (i=0; i<MAX_PLAYERS; i++)
+  {
+    summarized_player_action |= stored_player[i].action;
+
+    if (!network_playing)
+      stored_player[i].effective_action = stored_player[i].action;
+  }
+
+#if defined(PLATFORM_UNIX)
+  if (network_playing)
+    SendToServer_MovePlayer(summarized_player_action);
+#endif
+
+  if (!options.network && !setup.team_mode)
+    local_player->effective_action = summarized_player_action;
+
+  for (i=0; i<MAX_PLAYERS; i++)
+  {
+    int actual_player_action = stored_player[i].effective_action;
+
+    if (stored_player[i].programmed_action)
+      actual_player_action = stored_player[i].programmed_action;
+
+    if (recorded_player_action)
+      actual_player_action = recorded_player_action[i];
+
+    PlayerActions(&stored_player[i], actual_player_action);
+    ScrollFigure(&stored_player[i], SCROLL_GO_ON);
+  }
+
+  network_player_action_received = FALSE;
+
+  ScrollScreen(NULL, SCROLL_GO_ON);
+
+#if 0
+  FrameCounter++;
+  TimeFrames++;
+
+  for (i=0; i<MAX_PLAYERS; i++)
+    stored_player[i].Frame++;
+#endif
+
+#if 1
+  if (game.engine_version < RELEASE_IDENT(2,2,0,7))
+  {
+    for (i=0; i<MAX_PLAYERS; i++)
     {
-      if (IS_FREE(x,y+1))
-      {
-	InitMovingField(x,y,MV_DOWN);
-	Feld[x][y] = EL_CHANGED(Store2[x][y]);
-	Store[x][y] = EL_SIEB_LEER;
-      }
-      else if (Feld[x][y+1]==EL_SIEB_LEER)
+      struct PlayerInfo *player = &stored_player[i];
+      int x = player->jx;
+      int y = player->jy;
+
+      if (player->active && player->Pushing && player->is_moving &&
+	  IS_MOVING(x, y))
       {
-	if (!MovDelay[x][y])
-	  MovDelay[x][y] = TILEY/4 + 1;
+	ContinueMoving(x, y);
 
-	if (MovDelay[x][y])
+	/* continue moving after pushing (this is actually a bug) */
+	if (!IS_MOVING(x, y))
 	{
-	  MovDelay[x][y]--;
-	  if (MovDelay[x][y])
-	    return;
+	  Stop[x][y] = FALSE;
 	}
-
-	Feld[x][y] = EL_SIEB_LEER;
-	Feld[x][y+1] = EL_SIEB_VOLL;
-	Store2[x][y+1] = EL_CHANGED(Store2[x][y]);
-	Store2[x][y] = 0;
       }
     }
-    else if (element==EL_SIEB2_VOLL)
+  }
+#endif
+
+  for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
+  {
+    Stop[x][y] = FALSE;
+    if (JustStopped[x][y] > 0)
+      JustStopped[x][y]--;
+
+    GfxFrame[x][y]++;
+
+#if DEBUG
+    if (IS_BLOCKED(x, y))
     {
-      if (IS_FREE(x,y+1))
+      int oldx, oldy;
+
+      Blocked2Moving(x, y, &oldx, &oldy);
+      if (!IS_MOVING(oldx, oldy))
       {
-	InitMovingField(x,y,MV_DOWN);
-	Feld[x][y] = EL_CHANGED2(Store2[x][y]);
-	Store[x][y] = EL_SIEB2_LEER;
+	printf("GameActions(): (BLOCKED => MOVING) context corrupted!\n");
+	printf("GameActions(): BLOCKED: x = %d, y = %d\n", x, y);
+	printf("GameActions(): !MOVING: oldx = %d, oldy = %d\n", oldx, oldy);
+	printf("GameActions(): This should never happen!\n");
       }
-      else if (Feld[x][y+1]==EL_SIEB2_LEER)
-      {
-	if (!MovDelay[x][y])
-	  MovDelay[x][y] = TILEY/4 + 1;
+    }
+#endif
+  }
 
-	if (MovDelay[x][y])
-	{
-	  MovDelay[x][y]--;
-	  if (MovDelay[x][y])
-	    return;
-	}
+  for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
+  {
+    element = Feld[x][y];
+#if 1
+    graphic = el_act_dir2img(element, GfxAction[x][y], MovDir[x][y]);
+#else
+    graphic = el2img(element);
+#endif
 
-	Feld[x][y] = EL_SIEB2_LEER;
-	Feld[x][y+1] = EL_SIEB2_VOLL;
-	Store2[x][y+1] = EL_CHANGED2(Store2[x][y]);
-	Store2[x][y] = 0;
-      }
+#if 0
+    if (element == -1)
+    {
+      printf("::: %d,%d: %d [%d]\n", x, y, element, FrameCounter);
+
+      element = graphic = 0;
     }
-    else if (SiebAktiv && CAN_CHANGE(element) &&
-	     (Feld[x][y+1]==EL_SIEB_LEER || Feld[x][y+1]==EL_SIEB2_LEER))
+#endif
+
+    if (graphic_info[graphic].anim_global_sync)
+      GfxFrame[x][y] = FrameCounter;
+
+    if (ANIM_MODE(graphic) == ANIM_RANDOM &&
+	IS_NEXT_FRAME(GfxFrame[x][y], graphic))
+      ResetRandomAnimationValue(x, y);
+
+    SetRandomAnimationValue(x, y);
+
+#if 1
+    PlaySoundLevelActionIfLoop(x, y, GfxAction[x][y]);
+#endif
+
+    if (IS_INACTIVE(element))
     {
-      InitMovingField(x,y,MV_DOWN);
-      Store[x][y] =
-	(Feld[x][y+1]==EL_SIEB_LEER ? EL_SIEB_VOLL : EL_SIEB2_VOLL);
-      Store2[x][y+1] = element;
+      if (IS_ANIMATED(graphic))
+	DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+      continue;
     }
-    else if (CAN_SMASH(element) && Feld[x][y+1]==EL_SALZSAEURE)
+
+#if 1
+    /* this may take place after moving, so 'element' may have changed */
+    if (IS_CHANGING(x, y))
     {
-      Blurb(x,y);
-      InitMovingField(x,y,MV_DOWN);
-      Store[x][y] = EL_SALZSAEURE;
+      ChangeElement(x, y);
+      element = Feld[x][y];
+      graphic = el_act_dir2img(element, GfxAction[x][y], MovDir[x][y]);
     }
-    else if (CAN_SMASH(element) && Feld[x][y+1]==EL_BLOCKED && JustHit[x][y])
+#endif
+
+    if (!IS_MOVING(x, y) && (CAN_FALL(element) || CAN_MOVE(element)))
     {
-      Impact(x,y);
+      StartMoving(x, y);
+
+#if 1
+      graphic = el_act_dir2img(element, GfxAction[x][y], MovDir[x][y]);
+#if 0
+      if (element == EL_PACMAN)
+	printf("::: %d, %d, %d\n",
+	       IS_ANIMATED(graphic), IS_MOVING(x, y), Stop[x][y]);
+#endif
+#if 0
+      if (element == EL_YAMYAM)
+	printf("::: %d, %d, %d\n",
+	       IS_ANIMATED(graphic), IS_MOVING(x, y), Stop[x][y]);
+#endif
+#endif
+
+      if (IS_ANIMATED(graphic) &&
+	  !IS_MOVING(x, y) &&
+	  !Stop[x][y])
+      {
+	DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+#if 0
+	if (element == EL_YAMYAM)
+	  printf("::: %d, %d\n", graphic, GfxFrame[x][y]);
+#endif
+      }
+
+      if (IS_GEM(element) || element == EL_SP_INFOTRON)
+	EdelsteinFunkeln(x, y);
     }
-    else if (IS_FREE(x,y+1))
+    else if ((element == EL_ACID ||
+	      element == EL_EXIT_OPEN ||
+	      element == EL_SP_EXIT_OPEN ||
+	      element == EL_SP_TERMINAL ||
+	      element == EL_SP_TERMINAL_ACTIVE ||
+	      element == EL_EXTRA_TIME ||
+	      element == EL_SHIELD_NORMAL ||
+	      element == EL_SHIELD_DEADLY) &&
+	     IS_ANIMATED(graphic))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+    else if (IS_MOVING(x, y))
+      ContinueMoving(x, y);
+    else if (IS_ACTIVE_BOMB(element))
+      CheckDynamite(x, y);
+#if 0
+    else if (element == EL_EXPLOSION && !game.explosions_delayed)
+      Explode(x, y, ExplodePhase[x][y], EX_NORMAL);
+#endif
+    else if (element == EL_AMOEBA_GROWING)
+      AmoebeWaechst(x, y);
+    else if (element == EL_AMOEBA_SHRINKING)
+      AmoebaDisappearing(x, y);
+
+#if !USE_NEW_AMOEBA_CODE
+    else if (IS_AMOEBALIVE(element))
+      AmoebeAbleger(x, y);
+#endif
+
+    else if (element == EL_GAME_OF_LIFE || element == EL_BIOMAZE)
+      Life(x, y);
+    else if (element == EL_EXIT_CLOSED)
+      CheckExit(x, y);
+    else if (element == EL_SP_EXIT_CLOSED)
+      CheckExitSP(x, y);
+    else if (element == EL_EXPANDABLE_WALL_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)
+      MauerAbleger(x, y);
+    else if (element == EL_FLAMES)
+      CheckForDragon(x, y);
+#if 0
+    else if (IS_AUTO_CHANGING(element))
+      ChangeElement(x, y);
+#endif
+    else if (element == EL_EXPLOSION)
+      ;	/* drawing of correct explosion animation is handled separately */
+    else if (IS_ANIMATED(graphic) && !IS_CHANGING(x, y))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+#if 0
+    /* this may take place after moving, so 'element' may have changed */
+    if (IS_AUTO_CHANGING(Feld[x][y]))
+      ChangeElement(x, y);
+#endif
+
+    if (IS_BELT_ACTIVE(element))
+      PlaySoundLevelAction(x, y, ACTION_ACTIVE);
+
+    if (game.magic_wall_active)
     {
-      InitMovingField(x,y,MV_DOWN);
+      int jx = local_player->jx, jy = local_player->jy;
+
+      /* play the element sound at the position nearest to the player */
+      if ((element == EL_MAGIC_WALL_FULL ||
+	   element == EL_MAGIC_WALL_ACTIVE ||
+	   element == EL_MAGIC_WALL_EMPTYING ||
+	   element == EL_BD_MAGIC_WALL_FULL ||
+	   element == EL_BD_MAGIC_WALL_ACTIVE ||
+	   element == EL_BD_MAGIC_WALL_EMPTYING) &&
+	  ABS(x-jx) + ABS(y-jy) < ABS(magic_wall_x-jx) + ABS(magic_wall_y-jy))
+      {
+	magic_wall_x = x;
+	magic_wall_y = y;
+      }
     }
-    else if (element==EL_TROPFEN)
+  }
+
+#if USE_NEW_AMOEBA_CODE
+  /* new experimental amoeba growth stuff */
+#if 1
+  if (!(FrameCounter % 8))
+#endif
+  {
+    static unsigned long random = 1684108901;
+
+    for (i = 0; i < level.amoeba_speed * 28 / 8; i++)
     {
-      Feld[x][y] = EL_AMOEBING;
-      Store[x][y] = EL_AMOEBE_NASS;
+#if 0
+      x = (random >> 10) % lev_fieldx;
+      y = (random >> 20) % lev_fieldy;
+#else
+      x = RND(lev_fieldx);
+      y = RND(lev_fieldy);
+#endif
+      element = Feld[x][y];
+
+      if (!IS_PLAYER(x,y) &&
+	  (element == EL_EMPTY ||
+	   element == EL_SAND ||
+	   element == EL_QUICKSAND_EMPTY ||
+	   element == EL_ACID_SPLASH_LEFT ||
+	   element == EL_ACID_SPLASH_RIGHT))
+      {
+	if ((IN_LEV_FIELD(x, y-1) && Feld[x][y-1] == EL_AMOEBA_WET) ||
+	    (IN_LEV_FIELD(x-1, y) && Feld[x-1][y] == EL_AMOEBA_WET) ||
+	    (IN_LEV_FIELD(x+1, y) && Feld[x+1][y] == EL_AMOEBA_WET) ||
+	    (IN_LEV_FIELD(x, y+1) && Feld[x][y+1] == EL_AMOEBA_WET))
+	  Feld[x][y] = EL_AMOEBA_DROP;
+      }
+
+      random = random * 129 + 1;
     }
-    else if (IS_SLIPPERY(Feld[x][y+1]) && !Store[x][y+1])
+  }
+#endif
+
+#if 0
+  if (game.explosions_delayed)
+#endif
+  {
+    game.explosions_delayed = FALSE;
+
+    for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
     {
-      BOOL left  = (x>0 && IS_FREE(x-1,y) &&
-		    (IS_FREE(x-1,y+1) || Feld[x-1][y+1]==EL_SALZSAEURE));
-      BOOL right = (x<lev_fieldx-1 && IS_FREE(x+1,y) &&
-		    (IS_FREE(x+1,y+1) || Feld[x+1][y+1]==EL_SALZSAEURE));
+      element = Feld[x][y];
 
-      if (left || right)
-      {
-	if (left && right && game_emulation != EMU_BOULDERDASH)
-	  left = !(right = RND(2));
+      if (ExplodeField[x][y])
+	Explode(x, y, EX_PHASE_START, ExplodeField[x][y]);
+      else if (element == EL_EXPLOSION)
+	Explode(x, y, ExplodePhase[x][y], EX_NORMAL);
 
-	InitMovingField(x,y,left ? MV_LEFT : MV_RIGHT);
-      }
+      ExplodeField[x][y] = EX_NO_EXPLOSION;
     }
+
+    game.explosions_delayed = TRUE;
   }
-  else if (CAN_MOVE(element))
-  {
-    int newx,newy;
 
-    if (!MovDelay[x][y])	/* neuer Schritt / noch nicht gewartet */
+  if (game.magic_wall_active)
+  {
+    if (!(game.magic_wall_time_left % 4))
     {
-      /* Alle Figuren, die nach jeden Schritt die Richtung wechseln können.
-       * (MAMPFER, MAMPFER2 und PACMAN laufen bis zur nächsten Wand.)
-       */
+      int element = Feld[magic_wall_x][magic_wall_y];
 
-      if (element!=EL_MAMPFER && element!=EL_MAMPFER2 && element!=EL_PACMAN)
-      {
-	TurnRound(x,y);
-	if (MovDelay[x][y] && (element == EL_KAEFER || element == EL_FLIEGER))
-	  DrawLevelField(x,y);
-      }
+      if (element == EL_BD_MAGIC_WALL_FULL ||
+	  element == EL_BD_MAGIC_WALL_ACTIVE ||
+	  element == EL_BD_MAGIC_WALL_EMPTYING)
+	PlaySoundLevel(magic_wall_x, magic_wall_y, SND_BD_MAGIC_WALL_ACTIVE);
+      else
+	PlaySoundLevel(magic_wall_x, magic_wall_y, SND_MAGIC_WALL_ACTIVE);
     }
 
-    if (MovDelay[x][y])		/* neuer Schritt / in Wartezustand */
+    if (game.magic_wall_time_left > 0)
     {
-      MovDelay[x][y]--;
-
-      if (element==EL_ROBOT || element==EL_MAMPFER || element==EL_MAMPFER2)
-      {
-	int phase = MovDelay[x][y] % 8;
-
-	if (phase>3)
-	  phase = 7-phase;
-
-	if (IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-	  DrawGraphic(SCROLLX(x),SCROLLY(y), el2gfx(element)+phase);
-
-	if ((element==EL_MAMPFER || element==EL_MAMPFER2)
-	    && MovDelay[x][y]%4==3)
-	  PlaySoundLevel(x,y,SND_NJAM);
-      }
-      else if (element==EL_DRACHE)
+      game.magic_wall_time_left--;
+      if (!game.magic_wall_time_left)
       {
-	int i;
-	int dir = MovDir[x][y];
-	int dx = (dir == MV_LEFT ? -1 : dir == MV_RIGHT ? +1 : 0);
-	int dy = (dir == MV_UP   ? -1 : dir == MV_DOWN  ? +1 : 0);
-	int graphic = (dir == MV_LEFT	? GFX_FLAMMEN_LEFT :
-		       dir == MV_RIGHT	? GFX_FLAMMEN_RIGHT :
-		       dir == MV_UP	? GFX_FLAMMEN_UP :
-		       dir == MV_DOWN	? GFX_FLAMMEN_DOWN : GFX_LEERRAUM);
-	int phase = FrameCounter % 2;
-
-	for(i=1;i<=3;i++)
+	for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
 	{
-	  int xx = x + i*dx, yy = y + i*dy;
-	  int sx = SCROLLX(xx), sy = SCROLLY(yy);
-
-	  if (!IN_LEV_FIELD(xx,yy) ||
-	      IS_SOLID(Feld[xx][yy]) || Feld[xx][yy]==EL_EXPLODING)
-	    break;
+	  element = Feld[x][y];
 
-	  if (MovDelay[x][y])
+	  if (element == EL_MAGIC_WALL_ACTIVE ||
+	      element == EL_MAGIC_WALL_FULL)
 	  {
-	    int flamed = MovingOrBlocked2Element(xx,yy);
-
-	    if (IS_ENEMY(flamed) || IS_EXPLOSIVE(flamed))
-	      Bang(xx,yy);
-	    else
-	      RemoveMovingField(xx,yy);
-
-	    Feld[xx][yy] = EL_BURNING;
-	    if (IN_SCR_FIELD(sx,sy))
-	      DrawGraphic(sx,sy, graphic + phase*3 + i-1);
+	    Feld[x][y] = EL_MAGIC_WALL_DEAD;
+	    DrawLevelField(x, y);
 	  }
-	  else
+	  else if (element == EL_BD_MAGIC_WALL_ACTIVE ||
+		   element == EL_BD_MAGIC_WALL_FULL)
 	  {
-	    if (Feld[xx][yy] == EL_BURNING)
-	      Feld[xx][yy] = EL_LEERRAUM;
-	    DrawLevelField(xx,yy);
+	    Feld[x][y] = EL_BD_MAGIC_WALL_DEAD;
+	    DrawLevelField(x, y);
 	  }
 	}
-      }
-
-      if (MovDelay[x][y])
-	return;
-    }
 
-    if (element==EL_KAEFER || element==EL_BUTTERFLY)
-    {
-      PlaySoundLevel(x,y,SND_KLAPPER);
-    }
-    else if (element==EL_FLIEGER || element==EL_FIREFLY)
-    {
-      PlaySoundLevel(x,y,SND_ROEHR);
+	game.magic_wall_active = FALSE;
+      }
     }
+  }
 
-    /* neuer Schritt / Wartezustand beendet */
+  if (game.light_time_left > 0)
+  {
+    game.light_time_left--;
 
-    Moving2Blocked(x,y,&newx,&newy);	/* wohin soll's gehen? */
+    if (game.light_time_left == 0)
+      RedrawAllLightSwitchesAndInvisibleElements();
+  }
 
-    if (IS_ENEMY(element) && IS_PLAYER(newx,newy))
-    {
-      /* Spieler erwischt */
-      MovDir[x][y] = 0;
-      KillHero();
-      return;
-    }
-    else if ((element == EL_MAULWURF || element == EL_PINGUIN ||
-	      element==EL_ROBOT || element==EL_SONDE) &&
-	     IN_LEV_FIELD(newx,newy) &&
-	     MovDir[x][y]==MV_DOWN && Feld[newx][newy]==EL_SALZSAEURE)
-    {
-      Blurb(x,y);
-      Store[x][y] = EL_SALZSAEURE;
-    }
-    else if ((element == EL_MAULWURF || element == EL_PINGUIN) &&
-	     IN_LEV_FIELD(newx,newy))
-    {
-      if (Feld[newx][newy] == EL_AUSGANG_AUF)
-      {
-	Feld[x][y] = EL_LEERRAUM;
-	DrawLevelField(x,y);
+  if (game.timegate_time_left > 0)
+  {
+    game.timegate_time_left--;
 
-	PlaySoundLevel(newx,newy,SND_BUING);
-	if (IN_SCR_FIELD(SCROLLX(newx),SCROLLY(newy)))
-	  DrawGraphicThruMask(SCROLLX(newx),SCROLLY(newy),el2gfx(element));
+    if (game.timegate_time_left == 0)
+      CloseAllOpenTimegates();
+  }
 
-	Friends--;
-	if (!Friends && PlayerGone && !GameOver)
-	  LevelSolved = GameOver = TRUE;
+  for (i=0; i<MAX_PLAYERS; i++)
+  {
+    struct PlayerInfo *player = &stored_player[i];
 
-	return;
-      }
-      else if (IS_MAMPF3(Feld[newx][newy]))
-      {
-	if (DigField(newx,newy, 0,0, DF_DIG) == MF_MOVING)
-	  DrawLevelField(newx,newy);
-	else
-	  MovDir[x][y] = MV_NO_MOVING;
-      }
-      else if (!IS_FREE(newx,newy))
-      {
-	if (IS_PLAYER(x,y))
-	  DrawPlayerField();
-	else
-	  DrawLevelField(x,y);
-	return;
-      }
-    }
-    else if (element == EL_SCHWEIN && IN_LEV_FIELD(newx,newy))
+    if (SHIELD_ON(player))
     {
-      if (IS_GEM(Feld[newx][newy]))
-      {
-	if (IS_MOVING(newx,newy))
-	  RemoveMovingField(newx,newy);
-	else
-	{
-	  Feld[newx][newy] = EL_LEERRAUM;
-	  DrawLevelField(newx,newy);
-	}
-      }
-      else if (!IS_FREE(newx,newy))
-      {
-	if (IS_PLAYER(x,y))
-	  DrawPlayerField();
-	else
-	  DrawLevelField(x,y);
-	return;
-      }
+      if (player->shield_deadly_time_left)
+	PlaySoundLevel(player->jx, player->jy, SND_SHIELD_DEADLY_ACTIVE);
+      else if (player->shield_normal_time_left)
+	PlaySoundLevel(player->jx, player->jy, SND_SHIELD_NORMAL_ACTIVE);
     }
-    else if (element==EL_DRACHE && IN_LEV_FIELD(newx,newy))
-    {
-      if (!IS_FREE(newx,newy))
-      {
-	if (IS_PLAYER(x,y))
-	  DrawPlayerField();
-	else
-	  DrawLevelField(x,y);
-	return;
-      }
-      else
-      {
-	BOOL wanna_flame = !RND(10);
-	int dx = newx - x, dy = newy - y;
-	int newx1 = newx+1*dx, newy1 = newy+1*dy;
-	int newx2 = newx+2*dx, newy2 = newy+2*dy;
-	int element1 = (IN_LEV_FIELD(newx1,newy1) ?
-			MovingOrBlocked2Element(newx1,newy1) : EL_BETON);
-	int element2 = (IN_LEV_FIELD(newx2,newy2) ?
-			MovingOrBlocked2Element(newx2,newy2) : EL_BETON);
-
-	if ((wanna_flame || IS_ENEMY(element1) || IS_ENEMY(element2)) &&
-	    element1 != EL_DRACHE && element2 != EL_DRACHE &&
-	    element1 != EL_BURNING && element2 != EL_BURNING)
-	{
-	  if (IS_PLAYER(x,y))
-	    DrawPlayerField();
-	  else
-	    DrawLevelField(x,y);
+  }
 
-	  MovDelay[x][y] = 50;
-	  Feld[newx][newy] = EL_BURNING;
-	  if (IN_LEV_FIELD(newx1,newy1) && Feld[newx1][newy1] == EL_LEERRAUM)
-	    Feld[newx1][newy1] = EL_BURNING;
-	  if (IN_LEV_FIELD(newx2,newy2) && Feld[newx2][newy2] == EL_LEERRAUM)
-	    Feld[newx2][newy2] = EL_BURNING;
-	  return;
-	}
-      }
-    }
-    else if (element==EL_MAMPFER && IN_LEV_FIELD(newx,newy) &&
-	     Feld[newx][newy]==EL_DIAMANT)
-    {
-      if (IS_MOVING(newx,newy))
-	RemoveMovingField(newx,newy);
-      else
-      {
-	Feld[newx][newy] = EL_LEERRAUM;
-	DrawLevelField(newx,newy);
-      }
-    }
-    else if (element==EL_MAMPFER2 && IN_LEV_FIELD(newx,newy) &&
-	     IS_MAMPF2(Feld[newx][newy]))
-    {
-      if (AmoebaNr[newx][newy])
-      {
-	AmoebaCnt2[AmoebaNr[newx][newy]]--;
-	if (Feld[newx][newy]==EL_AMOEBE_VOLL || Feld[newx][newy]==EL_AMOEBE_BD)
-	  AmoebaCnt[AmoebaNr[newx][newy]]--;
-      }
+  if (TimeFrames >= (1000 / GameFrameDelay))
+  {
+    TimeFrames = 0;
+    TimePlayed++;
 
-      if (IS_MOVING(newx,newy))
-	RemoveMovingField(newx,newy);
-      else
-      {
-	Feld[newx][newy] = EL_LEERRAUM;
-	DrawLevelField(newx,newy);
-      }
-    }
-    else if (element==EL_PACMAN && IN_LEV_FIELD(newx,newy) &&
-	     IS_AMOEBOID(Feld[newx][newy]))
+    for (i=0; i<MAX_PLAYERS; i++)
     {
-      if (AmoebaNr[newx][newy])
-      {
-	AmoebaCnt2[AmoebaNr[newx][newy]]--;
-	if (Feld[newx][newy]==EL_AMOEBE_VOLL || Feld[newx][newy]==EL_AMOEBE_BD)
-	  AmoebaCnt[AmoebaNr[newx][newy]]--;
-      }
+      struct PlayerInfo *player = &stored_player[i];
 
-      Feld[newx][newy] = EL_LEERRAUM;
-      DrawLevelField(newx,newy);
-    }
-    else if (!IN_LEV_FIELD(newx,newy) || !IS_FREE(newx,newy))
-    {					/* gegen Wand gelaufen */
-      TurnRound(x,y);
-
-      if (element == EL_KAEFER || element == EL_FLIEGER)
-	DrawLevelField(x,y);
-      else if (element == EL_BUTTERFLY || element == EL_FIREFLY)
-	DrawGraphicAnimation(x,y, el2gfx(element), 2, 4, ANIM_NORMAL);
-      else if (element==EL_SONDE)
+      if (SHIELD_ON(player))
       {
-	int nextJX = JX + (JX - lastJX);
-	int nextJY = JY + (JY - lastJY);
+	player->shield_normal_time_left--;
 
-	if (!(PlayerPushing && PlayerGfxPos && x == nextJX && y == nextJY))
-	  DrawGraphicAnimation(x,y, GFX_SONDE_START, 8, 2, ANIM_NORMAL);
+	if (player->shield_deadly_time_left > 0)
+	  player->shield_deadly_time_left--;
       }
-
-      return;
     }
 
-    if (element==EL_ROBOT && IN_SCR_FIELD(x,y))
-      PlaySoundLevel(x,y,SND_SCHLURF);
+    if (tape.recording || tape.playing)
+      DrawVideoDisplay(VIDEO_STATE_TIME_ON, TimePlayed);
 
-    InitMovingField(x,y,MovDir[x][y]);
-  }
+    if (TimeLeft > 0)
+    {
+      TimeLeft--;
 
-  if (MovDir[x][y])
-    ContinueMoving(x,y);
-}
+      if (TimeLeft <= 10 && setup.time_limit)
+	PlaySoundStereo(SND_GAME_RUNNING_OUT_OF_TIME, SOUND_MIDDLE);
 
-void ContinueMoving(int x, int y)
-{
-  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);
-  int newx = x + dx, newy = y + dy;
-  int step = (horiz_move ? dx : dy) * TILEX/8;
+      DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FONT_TEXT_2);
 
-  if (CAN_FALL(element) && horiz_move)
-    step*=2;
-  else if (element==EL_TROPFEN)
-    step/=2;
-  else if (Store[x][y]==EL_MORAST_VOLL || Store[x][y]==EL_MORAST_LEER)
-    step/=4;
+      if (!TimeLeft && setup.time_limit)
+	for (i=0; i<MAX_PLAYERS; i++)
+	  KillHero(&stored_player[i]);
+    }
+    else if (level.time == 0 && !AllPlayersGone) /* level without time limit */
+      DrawText(DX_TIME, DY_TIME, int2str(TimePlayed, 3), FONT_TEXT_2);
+  }
 
-  MovPos[x][y] += step;
+  DrawAllPlayers();
 
-  if (ABS(MovPos[x][y])>=TILEX)		/* Zielfeld erreicht */
+  if (options.debug)			/* calculate frames per second */
   {
-    Feld[x][y] = EL_LEERRAUM;
-    Feld[newx][newy] = element;
+    static unsigned long fps_counter = 0;
+    static int fps_frames = 0;
+    unsigned long fps_delay_ms = Counter() - fps_counter;
 
-    if (Store[x][y]==EL_MORAST_VOLL)
-    {
-      Store[x][y] = 0;
-      Feld[newx][newy] = EL_MORAST_VOLL;
-      element = EL_MORAST_VOLL;
-    }
-    else if (Store[x][y]==EL_MORAST_LEER)
-    {
-      Store[x][y] = 0;
-      Feld[x][y] = EL_MORAST_LEER;
-    }
-    else if (Store[x][y]==EL_SIEB_VOLL)
-    {
-      Store[x][y] = 0;
-      element = Feld[newx][newy] = (SiebAktiv ? EL_SIEB_VOLL : EL_SIEB_TOT);
-    }
-    else if (Store[x][y]==EL_SIEB_LEER)
-    {
-      Store[x][y] = Store2[x][y] = 0;
-      Feld[x][y] = (SiebAktiv ? EL_SIEB_LEER : EL_SIEB_TOT);
-    }
-    else if (Store[x][y]==EL_SIEB2_VOLL)
-    {
-      Store[x][y] = 0;
-      element = Feld[newx][newy] = (SiebAktiv ? EL_SIEB2_VOLL : EL_SIEB2_TOT);
-    }
-    else if (Store[x][y]==EL_SIEB2_LEER)
-    {
-      Store[x][y] = Store2[x][y] = 0;
-      Feld[x][y] = (SiebAktiv ? EL_SIEB2_LEER : EL_SIEB2_TOT);
-    }
-    else if (Store[x][y]==EL_SALZSAEURE)
-    {
-      Store[x][y] = 0;
-      Feld[newx][newy] = EL_SALZSAEURE;
-      element = EL_SALZSAEURE;
-    }
-    else if (Store[x][y]==EL_AMOEBE_NASS)
+    fps_frames++;
+
+    if (fps_delay_ms >= 500)	/* calculate fps every 0.5 seconds */
     {
-      Store[x][y] = 0;
-      Feld[x][y] = EL_AMOEBE_NASS;
+      global.frames_per_second = 1000 * (float)fps_frames / fps_delay_ms;
+
+      fps_frames = 0;
+      fps_counter = Counter();
     }
 
-    MovPos[x][y] = MovDir[x][y] = MovDelay[x][y] = 0;
-    MovDelay[newx][newy] = 0;
+    redraw_mask |= REDRAW_FPS;
+  }
 
-    if (!CAN_MOVE(element))
-      MovDir[newx][newy] = 0;
+#if 0
+  if (stored_player[0].jx != stored_player[0].last_jx ||
+      stored_player[0].jy != stored_player[0].last_jy)
+    printf("::: %d, %d, %d, %d, %d\n",
+	   stored_player[0].MovDir,
+	   stored_player[0].MovPos,
+	   stored_player[0].GfxPos,
+	   stored_player[0].Frame,
+	   stored_player[0].StepFrame);
+#endif
 
-    DrawLevelField(x,y);
-    DrawLevelField(newx,newy);
+#if 1
+  FrameCounter++;
+  TimeFrames++;
 
-    Stop[newx][newy] = TRUE;
-    JustHit[x][newy] = 3;
+  for (i=0; i<MAX_PLAYERS; i++)
+  {
+    int move_frames =
+      MOVE_DELAY_NORMAL_SPEED /  stored_player[i].move_delay_value;
 
-    if (DONT_TOUCH(element))	/* Käfer oder Flieger */
-    {
-      TestIfBadThingHitsHero();
-      TestIfBadThingHitsFriend(newx,newy);
-      TestIfBadThingHitsOtherBadThing(newx,newy);
-    }
-    else if (element == EL_PINGUIN)
-      TestIfFriendHitsBadThing(newx,newy);
+    stored_player[i].Frame += move_frames;
 
-    if (CAN_SMASH(element) && direction==MV_DOWN &&
-	(newy==lev_fieldy-1 || !IS_FREE(x,newy+1)))
-      Impact(x,newy);
+    if (stored_player[i].MovPos != 0)
+      stored_player[i].StepFrame += move_frames;
   }
-  else				/* noch in Bewegung */
-    DrawLevelField(x,y);
+#endif
 }
 
-int AmoebeNachbarNr(int ax, int ay)
+static boolean AllPlayersInSight(struct PlayerInfo *player, int x, int y)
 {
+  int min_x = x, min_y = y, max_x = x, max_y = y;
   int i;
-  int element = Feld[ax][ay];
-  int group_nr = 0;
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
 
-  for(i=0;i<4;i++)
+  for (i=0; i<MAX_PLAYERS; i++)
   {
-    int x = ax+xy[i%4][0];
-    int y = ay+xy[i%4][1];
+    int jx = stored_player[i].jx, jy = stored_player[i].jy;
 
-    if (!IN_LEV_FIELD(x,y))
+    if (!stored_player[i].active || &stored_player[i] == player)
       continue;
 
-    if (Feld[x][y]==element && AmoebaNr[x][y]>0)
-      group_nr = AmoebaNr[x][y];
+    min_x = MIN(min_x, jx);
+    min_y = MIN(min_y, jy);
+    max_x = MAX(max_x, jx);
+    max_y = MAX(max_y, jy);
   }
 
-  return(group_nr);
+  return (max_x - min_x < SCR_FIELDX && max_y - min_y < SCR_FIELDY);
 }
 
-void AmoebenVereinigen(int ax, int ay)
+static boolean AllPlayersInVisibleScreen()
 {
-  int i,x,y,xx,yy;
-  int new_group_nr = AmoebaNr[ax][ay];
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
-
-  if (!new_group_nr)
-    return;
+  int i;
 
-  for(i=0;i<4;i++)
+  for (i=0; i<MAX_PLAYERS; i++)
   {
-    x = ax+xy[i%4][0];
-    y = ay+xy[i%4][1];
+    int jx = stored_player[i].jx, jy = stored_player[i].jy;
 
-    if (!IN_LEV_FIELD(x,y))
+    if (!stored_player[i].active)
       continue;
 
-    if ((Feld[x][y]==EL_AMOEBE_VOLL ||
-	 Feld[x][y]==EL_AMOEBE_BD ||
-	 Feld[x][y]==EL_AMOEBE_TOT) &&
-	AmoebaNr[x][y] != new_group_nr)
-    {
-      int old_group_nr = AmoebaNr[x][y];
-
-      AmoebaCnt[new_group_nr] += AmoebaCnt[old_group_nr];
-      AmoebaCnt[old_group_nr] = 0;
-      AmoebaCnt2[new_group_nr] += AmoebaCnt2[old_group_nr];
-      AmoebaCnt2[old_group_nr] = 0;
-
-      for(yy=0;yy<lev_fieldy;yy++) for(xx=0;xx<lev_fieldx;xx++)
-	if (AmoebaNr[xx][yy]==old_group_nr)
-	  AmoebaNr[xx][yy] = new_group_nr;
-    }
+    if (!IN_VIS_FIELD(SCREENX(jx), SCREENY(jy)))
+      return FALSE;
   }
+
+  return TRUE;
 }
 
-void AmoebeUmwandeln(int ax, int ay)
+void ScrollLevel(int dx, int dy)
 {
-  int i,x,y;
-  int group_nr = AmoebaNr[ax][ay];
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
+  int softscroll_offset = (setup.soft_scrolling ? TILEX : 0);
+  int x, y;
 
-  if (Feld[ax][ay]==EL_AMOEBE_TOT)
+  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,
+	     FX + TILEX*(dx == 1) - softscroll_offset,
+	     FY + TILEY*(dy == 1) - softscroll_offset);
+
+  if (dx)
   {
-    for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
-    {
-      if (Feld[x][y]==EL_AMOEBE_TOT && AmoebaNr[x][y]==group_nr)
-      {
-	AmoebaNr[x][y] = 0;
-	Feld[x][y] = EL_AMOEBA2DIAM;
-      }
-    }
-    Bang(ax,ay);
+    x = (dx == 1 ? BX1 : BX2);
+    for (y=BY1; y<=BY2; y++)
+      DrawScreenField(x, y);
   }
-  else
-  {
-    for(i=0;i<4;i++)
-    {
-      x = ax+xy[i%4][0];
-      y = ay+xy[i%4][1];
-
-      if (!IN_LEV_FIELD(x,y))
-	continue;
 
-      if (Feld[x][y]==EL_AMOEBA2DIAM)
-	Bang(x,y);
-    }
+  if (dy)
+  {
+    y = (dy == 1 ? BY1 : BY2);
+    for (x=BX1; x<=BX2; x++)
+      DrawScreenField(x, y);
   }
+
+  redraw_mask |= REDRAW_FIELD;
 }
 
-void AmoebeUmwandeln2(int ax, int ay, int new_element)
+static void CheckGravityMovement(struct PlayerInfo *player)
 {
-  int x,y;
-  int group_nr = AmoebaNr[ax][ay];
-  BOOL done = FALSE;
-
-  for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
+  if (level.gravity && !player->programmed_action)
   {
-    if (AmoebaNr[x][y]==group_nr &&
-	(Feld[x][y]==EL_AMOEBE_TOT ||
-	 Feld[x][y]==EL_AMOEBE_BD ||
-	 Feld[x][y]==EL_AMOEBING))
-    {
-      AmoebaNr[x][y] = 0;
-      Feld[x][y] = new_element;
-      DrawLevelField(x,y);
-      done = TRUE;
-    }
+    int move_dir_vertical = player->action & (MV_UP | MV_DOWN);
+    int move_dir_horizontal = player->action & (MV_LEFT | MV_RIGHT);
+    int move_dir =
+      (player->last_move_dir & (MV_LEFT | MV_RIGHT) ?
+       (move_dir_vertical ? move_dir_vertical : move_dir_horizontal) :
+       (move_dir_horizontal ? move_dir_horizontal : move_dir_vertical));
+    int jx = player->jx, jy = player->jy;
+    int dx = (move_dir & MV_LEFT ? -1 : move_dir & MV_RIGHT ? +1 : 0);
+    int dy = (move_dir & MV_UP ? -1 : move_dir & MV_DOWN ? +1 : 0);
+    int new_jx = jx + dx, new_jy = jy + dy;
+    boolean field_under_player_is_free =
+      (IN_LEV_FIELD(jx, jy + 1) && IS_FREE(jx, jy + 1));
+    boolean player_is_moving_to_valid_field =
+      (IN_LEV_FIELD(new_jx, new_jy) &&
+       (Feld[new_jx][new_jy] == EL_SP_BASE ||
+	Feld[new_jx][new_jy] == EL_SAND));
+
+    if (field_under_player_is_free &&
+	!player_is_moving_to_valid_field &&
+	!IS_WALKABLE_INSIDE(Feld[jx][jy]))
+      player->programmed_action = MV_DOWN;
   }
-
-  if (done)
-    PlaySoundLevel(ax,ay,new_element==EL_FELSBROCKEN ? SND_KLOPF : SND_PLING);
 }
 
-void AmoebeWaechst(int x, int y)
+/*
+  MoveFigureOneStep()
+  -----------------------------------------------------------------------------
+  dx, dy:		direction (non-diagonal) to try to move the player to
+  real_dx, real_dy:	direction as read from input device (can be diagonal)
+*/
+
+boolean MoveFigureOneStep(struct PlayerInfo *player,
+			  int dx, int dy, int real_dx, int real_dy)
 {
-  static long sound_delay = 0;
-  static int sound_delay_value = 0;
+  int jx = player->jx, jy = player->jy;
+  int new_jx = jx+dx, new_jy = jy+dy;
+  int element;
+  int can_move;
 
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
-  {
-    MovDelay[x][y] = 7;
+  if (!player->active || (!dx && !dy))
+    return MF_NO_ACTION;
 
-    if (DelayReached(&sound_delay,sound_delay_value))
-    {
-      PlaySoundLevel(x,y,SND_AMOEBE);
-      sound_delay_value = 30;
-    }
-  }
+  player->MovDir = (dx < 0 ? MV_LEFT :
+		    dx > 0 ? MV_RIGHT :
+		    dy < 0 ? MV_UP :
+		    dy > 0 ? MV_DOWN :	MV_NO_MOVING);
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
-  {
-    MovDelay[x][y]--;
-    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-      DrawGraphic(SCROLLX(x),SCROLLY(y),GFX_AMOEBING+3-MovDelay[x][y]/2);
+  if (!IN_LEV_FIELD(new_jx, new_jy))
+    return MF_NO_ACTION;
 
-    if (!MovDelay[x][y])
+  if (!options.network && !AllPlayersInSight(player, new_jx, new_jy))
+    return MF_NO_ACTION;
+
+#if 0
+  element = MovingOrBlocked2Element(new_jx, new_jy);
+#else
+  element = MovingOrBlocked2ElementIfNotLeaving(new_jx, new_jy);
+#endif
+
+  if (DONT_RUN_INTO(element))
+  {
+    if (element == EL_ACID && dx == 0 && dy == 1)
     {
-      Feld[x][y] = Store[x][y];
-      Store[x][y] = 0;
-      DrawLevelField(x,y);
+      SplashAcid(jx, jy);
+      Feld[jx][jy] = EL_PLAYER_1;
+      InitMovingField(jx, jy, MV_DOWN);
+      Store[jx][jy] = EL_ACID;
+      ContinueMoving(jx, jy);
+      BuryHero(player);
     }
+    else
+      TestIfHeroRunsIntoBadThing(jx, jy, player->MovDir);
+
+    return MF_MOVING;
   }
+
+  can_move = DigField(player, new_jx, new_jy, real_dx, real_dy, DF_DIG);
+  if (can_move != MF_MOVING)
+    return can_move;
+
+  StorePlayer[jx][jy] = 0;
+  player->last_jx = jx;
+  player->last_jy = jy;
+  jx = player->jx = new_jx;
+  jy = player->jy = new_jy;
+  StorePlayer[jx][jy] = player->element_nr;
+
+  player->MovPos =
+    (dx > 0 || dy > 0 ? -1 : 1) * (TILEX - TILEX / player->move_delay_value);
+
+  ScrollFigure(player, SCROLL_INIT);
+
+  return MF_MOVING;
 }
 
-void AmoebeAbleger(int ax, int ay)
-{
-  int i;
-  int element = Feld[ax][ay];
-  int newax = ax, neway = ay;
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
+boolean MoveFigure(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;
 
-  if (!level.tempo_amoebe)
-  {
-    Feld[ax][ay] = EL_AMOEBE_TOT;
-    DrawLevelField(ax,ay);
-    return;
-  }
+  if (!player->active || (!dx && !dy))
+    return FALSE;
 
-  if (!MovDelay[ax][ay])	/* neue Amoebe / noch nicht gewartet */
-    MovDelay[ax][ay] = RND(FRAMES_PER_SECOND * 25/(1+level.tempo_amoebe));
+#if 0
+  if (!FrameReached(&player->move_delay, player->move_delay_value) &&
+      !tape.playing)
+    return FALSE;
+#else
+  if (!FrameReached(&player->move_delay, player->move_delay_value) &&
+      !(tape.playing && tape.file_version < FILE_VERSION_2_0))
+    return FALSE;
+#endif
 
-  if (MovDelay[ax][ay])		/* neue Amoebe / in Wartezustand */
-  {
-    MovDelay[ax][ay]--;
-    if (MovDelay[ax][ay])
-      return;
-  }
+  /* remove the last programmed player action */
+  player->programmed_action = 0;
 
-  if (element==EL_AMOEBE_NASS)	/* tropfende Amöbe */
+  if (player->MovPos)
   {
-    int start = RND(4);
-    int x = ax+xy[start][0];
-    int y = ay+xy[start][1];
+    /* should only happen if pre-1.2 tape recordings are played */
+    /* this is only for backward compatibility */
 
-    if (!IN_LEV_FIELD(x,y))
-      return;
+    int original_move_delay_value = player->move_delay_value;
+
+#if DEBUG
+    printf("THIS SHOULD ONLY HAPPEN WITH PRE-1.2 LEVEL TAPES. [%ld]\n",
+	   tape.counter);
+#endif
+
+    /* scroll remaining steps with finest movement resolution */
+    player->move_delay_value = MOVE_DELAY_NORMAL_SPEED;
 
-    if (IS_FREE(x,y) ||
-	Feld[x][y]==EL_ERDREICH || Feld[x][y]==EL_MORAST_LEER)
+    while (player->MovPos)
     {
-      newax = x;
-      neway = y;
+      ScrollFigure(player, SCROLL_GO_ON);
+      ScrollScreen(NULL, SCROLL_GO_ON);
+      FrameCounter++;
+      DrawAllPlayers();
+      BackToFront();
     }
 
-    if (newax==ax && neway==ay)
-      return;
+    player->move_delay_value = original_move_delay_value;
   }
-  else				/* normale oder "gefüllte" Amöbe */
+
+  if (player->last_move_dir & (MV_LEFT | MV_RIGHT))
   {
-    int start = RND(4);
-    BOOL waiting_for_player = FALSE;
+    if (!(moved |= MoveFigureOneStep(player, 0, dy, dx, dy)))
+      moved |= MoveFigureOneStep(player, dx, 0, dx, dy);
+  }
+  else
+  {
+    if (!(moved |= MoveFigureOneStep(player, dx, 0, dx, dy)))
+      moved |= MoveFigureOneStep(player, 0, dy, dx, dy);
+  }
+
+  jx = player->jx;
+  jy = player->jy;
+
+  if (moved & MF_MOVING && !ScreenMovPos &&
+      (player == local_player || !options.network))
+  {
+    int old_scroll_x = scroll_x, old_scroll_y = scroll_y;
+    int offset = (setup.scroll_delay ? 3 : 0);
 
-    for(i=0;i<4;i++)
+    if (!IN_VIS_FIELD(SCREENX(jx), SCREENY(jy)))
     {
-      int j = (start+i)%4;
-      int x = ax+xy[j][0];
-      int y = ay+xy[j][1];
+      /* actual player has left the screen -- scroll in that direction */
+      if (jx != old_jx)		/* player has moved horizontally */
+	scroll_x += (jx - old_jx);
+      else			/* player has moved vertically */
+	scroll_y += (jy - old_jy);
+    }
+    else
+    {
+      if (jx != old_jx)		/* player has moved horizontally */
+      {
+ 	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);
 
-      if (!IN_LEV_FIELD(x,y))
-	continue;
+	/* don't scroll over playfield boundaries */
+	if (scroll_x < SBX_Left || scroll_x > SBX_Right)
+	  scroll_x = (scroll_x < SBX_Left ? SBX_Left : SBX_Right);
+
+	/* don't scroll more than one field at a time */
+	scroll_x = old_scroll_x + SIGN(scroll_x - old_scroll_x);
 
-      if (IS_FREE(x,y) ||
-	  Feld[x][y]==EL_ERDREICH || Feld[x][y]==EL_MORAST_LEER)
+	/* don't scroll against the player's moving direction */
+	if ((player->MovDir == MV_LEFT && scroll_x > old_scroll_x) ||
+	    (player->MovDir == MV_RIGHT && scroll_x < old_scroll_x))
+	  scroll_x = old_scroll_x;
+      }
+      else			/* player has moved vertically */
       {
-	newax = x;
-	neway = y;
-	break;
+	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);
+
+	/* don't scroll over playfield boundaries */
+	if (scroll_y < SBY_Upper || scroll_y > SBY_Lower)
+	  scroll_y = (scroll_y < SBY_Upper ? SBY_Upper : SBY_Lower);
+
+	/* don't scroll more than one field at a time */
+	scroll_y = old_scroll_y + SIGN(scroll_y - old_scroll_y);
+
+	/* don't scroll against the player's moving direction */
+	if ((player->MovDir == MV_UP && scroll_y > old_scroll_y) ||
+	    (player->MovDir == MV_DOWN && scroll_y < old_scroll_y))
+	  scroll_y = old_scroll_y;
       }
-      else if (IS_PLAYER(x,y))
-	waiting_for_player = TRUE;
     }
 
-    if (newax==ax && neway==ay)
+    if (scroll_x != old_scroll_x || scroll_y != old_scroll_y)
     {
-      if (i==4 && !waiting_for_player)
+      if (!options.network && !AllPlayersInVisibleScreen())
       {
-	Feld[ax][ay] = EL_AMOEBE_TOT;
-	DrawLevelField(ax,ay);
-	AmoebaCnt[AmoebaNr[ax][ay]]--;
-
-	if (AmoebaCnt[AmoebaNr[ax][ay]]<=0)	/* Amöbe vollständig tot */
-	{
-	  if (element==EL_AMOEBE_VOLL)
-	    AmoebeUmwandeln(ax,ay);
-	  else if (element==EL_AMOEBE_BD)
-	    AmoebeUmwandeln2(ax,ay,level.amoebe_inhalt);
-	}
+	scroll_x = old_scroll_x;
+	scroll_y = old_scroll_y;
       }
-      return;
-    }
-    else if (element==EL_AMOEBE_VOLL || element==EL_AMOEBE_BD)
-    {
-      int new_group_nr = AmoebaNr[ax][ay];
-
-      AmoebaNr[newax][neway] = new_group_nr;
-      AmoebaCnt[new_group_nr]++;
-      AmoebaCnt2[new_group_nr]++;
-      AmoebenVereinigen(newax,neway);
-
-      if (AmoebaCnt2[new_group_nr] >= 200 && element==EL_AMOEBE_BD)
+      else
       {
-	AmoebeUmwandeln2(newax,neway,EL_FELSBROCKEN);
-	return;
+	ScrollScreen(player, SCROLL_INIT);
+	ScrollLevel(old_scroll_x - scroll_x, old_scroll_y - scroll_y);
       }
     }
   }
 
-  if (element!=EL_AMOEBE_NASS || neway<ay || !IS_FREE(newax,neway) ||
-      (neway==lev_fieldy-1 && newax!=ax))
+#if 0
+#if 1
+  InitPlayerGfxAnimation(player, ACTION_DEFAULT);
+#else
+  if (!(moved & MF_MOVING) && !player->Pushing)
+    player->Frame = 0;
+#endif
+#endif
+
+  player->StepFrame = 0;
+
+  if (moved & MF_MOVING)
   {
-    Feld[newax][neway] = EL_AMOEBING;
-    Store[newax][neway] = element;
+    if (old_jx != jx && old_jy == jy)
+      player->MovDir = (old_jx < jx ? MV_RIGHT : MV_LEFT);
+    else if (old_jx == jx && old_jy != jy)
+      player->MovDir = (old_jy < jy ? MV_DOWN : MV_UP);
+
+    DrawLevelField(jx, jy);	/* for "crumbled sand" */
+
+    player->last_move_dir = player->MovDir;
+    player->is_moving = TRUE;
   }
-  else if (neway==ay)
-    Feld[newax][neway] = EL_TROPFEN;
   else
   {
-    InitMovingField(ax,ay,MV_DOWN);
-    Feld[ax][ay] = EL_TROPFEN;
-    Store[ax][ay] = EL_AMOEBE_NASS;
-    ContinueMoving(ax,ay);
-    return;
+    CheckGravityMovement(player);
+
+    /*
+    player->last_move_dir = MV_NO_MOVING;
+    */
+    player->is_moving = FALSE;
   }
 
-  DrawLevelField(newax,neway);
+  TestIfHeroTouchesBadThing(jx, jy);
+  TestIfPlayerTouchesCustomElement(jx, jy);
+
+  if (!player->active)
+    RemoveHero(player);
+
+  return moved;
 }
 
-void Life(int ax, int ay)
+void ScrollFigure(struct PlayerInfo *player, int mode)
 {
-  int x1,y1,x2,y2;
-  static int life[4] = { 2,3,3,3 };	/* "Life"-Parameter */
-  int life_time = 40;
-  int element = Feld[ax][ay];
+  int jx = player->jx, jy = player->jy;
+  int last_jx = player->last_jx, last_jy = player->last_jy;
+  int move_stepsize = TILEX / player->move_delay_value;
 
-  if (Stop[ax][ay])
+  if (!player->active || !player->MovPos)
     return;
 
-  if (!MovDelay[ax][ay])	/* neue Phase / noch nicht gewartet */
-    MovDelay[ax][ay] = life_time;
-
-  if (MovDelay[ax][ay])		/* neue Phase / in Wartezustand */
+  if (mode == SCROLL_INIT)
   {
-    MovDelay[ax][ay]--;
-    if (MovDelay[ax][ay])
-      return;
+    player->actual_frame_counter = FrameCounter;
+    player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
+
+    if (Feld[last_jx][last_jy] == EL_EMPTY)
+      Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
+
+    DrawPlayer(player);
+    return;
   }
+  else if (!FrameReached(&player->actual_frame_counter, 1))
+    return;
 
-  for(y1=-1;y1<2;y1++) for(x1=-1;x1<2;x1++)
-  {
-    int xx = ax+x1, yy = ay+y1;
-    int nachbarn = 0;
+  player->MovPos += (player->MovPos > 0 ? -1 : 1) * move_stepsize;
+  player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
-    if (!IN_LEV_FIELD(xx,yy))
-      continue;
+  if (Feld[last_jx][last_jy] == EL_PLAYER_IS_LEAVING)
+    Feld[last_jx][last_jy] = EL_EMPTY;
 
-    for(y2=-1;y2<2;y2++) for(x2=-1;x2<2;x2++)
-    {
-      int x = xx+x2, y = yy+y2;
+  /* before DrawPlayer() to draw correct player graphic for this case */
+  if (player->MovPos == 0)
+    CheckGravityMovement(player);
 
-      if (!IN_LEV_FIELD(x,y) || (x==xx && y==yy))
-	continue;
+  DrawPlayer(player);
 
-      if (((Feld[x][y]==element || (element==EL_LIFE && IS_PLAYER(x,y))) &&
-	   !Stop[x][y]) ||
-	  (IS_FREE(x,y) && Stop[x][y]))
-	nachbarn++;
+  if (player->MovPos == 0)
+  {
+    if (IS_PASSABLE(Feld[last_jx][last_jy]))
+    {
+      /* continue with normal speed after quickly moving through gate */
+      HALVE_PLAYER_SPEED(player);
+
+      /* be able to make the next move without delay */
+      player->move_delay = 0;
     }
 
-    if (xx==ax && yy==ay)		/* mittleres Feld mit Amoebe */
+    player->last_jx = jx;
+    player->last_jy = jy;
+
+    if (Feld[jx][jy] == EL_EXIT_OPEN ||
+	Feld[jx][jy] == EL_SP_EXIT_OPEN)
     {
-      if (nachbarn<life[0] || nachbarn>life[1])
-      {
-	Feld[xx][yy] = EL_LEERRAUM;
-	if (!Stop[xx][yy])
-	  DrawLevelField(xx,yy);
-	Stop[xx][yy] = TRUE;
-      }
-    }
-    else if (IS_FREE(xx,yy) || Feld[xx][yy]==EL_ERDREICH)
-    {					/* Randfeld ohne Amoebe */
-      if (nachbarn>=life[2] && nachbarn<=life[3])
-      {
-	Feld[xx][yy] = element;
-	MovDelay[xx][yy] = (element==EL_LIFE ? 0 : life_time-1);
-	if (!Stop[xx][yy])
-	  DrawLevelField(xx,yy);
-	Stop[xx][yy] = TRUE;
-      }
+      RemoveHero(player);
+
+      if (local_player->friends_still_needed == 0 ||
+	  Feld[jx][jy] == EL_SP_EXIT_OPEN)
+	player->LevelSolved = player->GameOver = TRUE;
     }
+
+    if (tape.single_step && tape.recording && !tape.pausing &&
+	!player->programmed_action)
+      TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
   }
 }
 
-void Ablenk(int x, int y)
+void ScrollScreen(struct PlayerInfo *player, int mode)
 {
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
-    MovDelay[x][y] = level.dauer_ablenk * FRAMES_PER_SECOND;
+  static unsigned long screen_frame_counter = 0;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  if (mode == SCROLL_INIT)
   {
-    MovDelay[x][y]--;
-    if (MovDelay[x][y])
-    {
-      if (IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-	DrawGraphic(SCROLLX(x),SCROLLY(y),GFX_ABLENK+MovDelay[x][y]%4);
-      if (!(MovDelay[x][y]%4))
-	PlaySoundLevel(x,y,SND_MIEP);
-      return;
-    }
+    /* set scrolling step size according to actual player's moving speed */
+    ScrollStepSize = TILEX / player->move_delay_value;
+
+    screen_frame_counter = FrameCounter;
+    ScreenMovDir = player->MovDir;
+    ScreenMovPos = player->MovPos;
+    ScreenGfxPos = ScrollStepSize * (ScreenMovPos / ScrollStepSize);
+    return;
   }
+  else if (!FrameReached(&screen_frame_counter, 1))
+    return;
 
-  Feld[x][y] = EL_ABLENK_AUS;
-  DrawLevelField(x,y);
-  if (ZX==x && ZY==y)
-    ZX = ZY = -1;
+  if (ScreenMovPos)
+  {
+    ScreenMovPos += (ScreenMovPos > 0 ? -1 : 1) * ScrollStepSize;
+    ScreenGfxPos = ScrollStepSize * (ScreenMovPos / ScrollStepSize);
+    redraw_mask |= REDRAW_FIELD;
+  }
+  else
+    ScreenMovDir = MV_NO_MOVING;
 }
 
-void Birne(int x, int y)
+void TestIfPlayerTouchesCustomElement(int x, int y)
 {
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
-    MovDelay[x][y] = 800;
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+  boolean center_is_player = (IS_PLAYER(x, y));
+  int i;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  for (i=0; i<4; i++)
   {
-    MovDelay[x][y]--;
-    if (MovDelay[x][y])
+    int xx = x + xy[i][0];
+    int yy = y + xy[i][1];
+
+    if (!IN_LEV_FIELD(xx, yy))
+      continue;
+
+    if (center_is_player)
     {
-      if (!(MovDelay[x][y]%5))
-      {
-	if (!(MovDelay[x][y]%10))
-	  Feld[x][y]=EL_ABLENK_EIN;
-	else
-	  Feld[x][y]=EL_ABLENK_AUS;
-	DrawLevelField(x,y);
-	Feld[x][y]=EL_ABLENK_EIN;
-      }
-      return;
+      CheckTriggeredElementChange(xx, yy, Feld[xx][yy], CE_OTHER_GETS_TOUCHED);
+      CheckElementChange(xx, yy, Feld[xx][yy], CE_TOUCHED_BY_PLAYER);
     }
-  }
-
-  Feld[x][y]=EL_ABLENK_AUS;
-  DrawLevelField(x,y);
-  if (ZX==x && ZY==y)
-    ZX=ZY=-1;
-}
+    else if (IS_PLAYER(xx, yy))
+    {
+      CheckTriggeredElementChange(x, y, Feld[x][y], CE_OTHER_GETS_TOUCHED);
+      CheckElementChange(x, y, Feld[x][y], CE_TOUCHED_BY_PLAYER);
 
-void Blubber(int x, int y)
-{
-  if (y > 0 && IS_MOVING(x,y-1) && MovDir[x][y-1] == MV_DOWN)
-    DrawLevelField(x,y-1);
-  else
-    DrawGraphicAnimation(x,y, GFX_GEBLUBBER, 4, 10, ANIM_NORMAL);
+      break;
+    }
+  }
 }
 
-void NussKnacken(int x, int y)
+void TestIfElementTouchesCustomElement(int x, int y)
 {
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
-    MovDelay[x][y] = 7;
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+  boolean center_is_custom = (IS_CUSTOM_ELEMENT(Feld[x][y]));
+  int i;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  for (i=0; i<4; i++)
   {
-    MovDelay[x][y]--;
-    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-      DrawGraphic(SCROLLX(x),SCROLLY(y),GFX_CRACKINGNUT+3-MovDelay[x][y]/2);
+    int xx = x + xy[i][0];
+    int yy = y + xy[i][1];
 
-    if (!MovDelay[x][y])
+    if (!IN_LEV_FIELD(xx, yy))
+      continue;
+
+    if (center_is_custom &&
+	Feld[xx][yy] == element_info[Feld[x][y]].change.trigger_element)
     {
-      Feld[x][y] = EL_EDELSTEIN;
-      DrawLevelField(x,y);
+      CheckElementChange(x, y, Feld[x][y], CE_OTHER_IS_TOUCHING);
     }
-  }
-}
 
-void SiebAktivieren(int x, int y, int typ)
-{
-  if (!(SiebAktiv % 4) && IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-    DrawGraphic(SCROLLX(x),SCROLLY(y),
-		(typ==1 ? GFX_SIEB_VOLL : GFX_SIEB2_VOLL)+3-(SiebAktiv%16)/4);
+    if (IS_CUSTOM_ELEMENT(Feld[xx][yy]) &&
+	Feld[x][y] == element_info[Feld[xx][yy]].change.trigger_element)
+    {
+      CheckElementChange(xx, yy, Feld[xx][yy], CE_OTHER_IS_TOUCHING);
+    }
+  }
 }
 
-void AusgangstuerPruefen(int x, int y)
+void TestIfGoodThingHitsBadThing(int good_x, int good_y, int good_move_dir)
 {
-  if (!Gems && !SokobanFields && !Lights)
+  int i, kill_x = -1, kill_y = -1;
+  static int test_xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+  static int test_dir[4] =
   {
-    Feld[x][y] = EL_AUSGANG_ACT;
+    MV_UP,
+    MV_LEFT,
+    MV_RIGHT,
+    MV_DOWN
+  };
 
-    if (IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-      PlaySoundLevel(x,y,SND_OEFFNEN);
-    else
-      PlaySoundLevel(JX,JY,SND_OEFFNEN);
-  }
-}
+  for (i=0; i<4; i++)
+  {
+    int test_x, test_y, test_move_dir, test_element;
 
-void AusgangstuerOeffnen(int x, int y)
-{
-  int delay = 6;
+    test_x = good_x + test_xy[i][0];
+    test_y = good_y + test_xy[i][1];
+    if (!IN_LEV_FIELD(test_x, test_y))
+      continue;
 
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
-    MovDelay[x][y] = 5*delay;
+    test_move_dir =
+      (IS_MOVING(test_x, test_y) ? MovDir[test_x][test_y] : MV_NO_MOVING);
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
-  {
-    int tuer;
+#if 0
+    test_element = Feld[test_x][test_y];
+#else
+    test_element = MovingOrBlocked2ElementIfNotLeaving(test_x, test_y);
+#endif
 
-    MovDelay[x][y]--;
-    tuer = MovDelay[x][y]/delay;
-    if (!(MovDelay[x][y]%delay) && IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-      DrawGraphic(SCROLLX(x),SCROLLY(y),GFX_AUSGANG_AUF-tuer);
+    /* 1st case: good thing is moving towards DONT_RUN_INTO style bad thing;
+       2nd case: DONT_TOUCH style bad thing does not move away from good thing
+    */
+    if ((DONT_RUN_INTO(test_element) && good_move_dir == test_dir[i]) ||
+	(DONT_TOUCH(test_element)    && test_move_dir != test_dir[i]))
+    {
+      kill_x = test_x;
+      kill_y = test_y;
+      break;
+    }
+  }
 
-    if (!MovDelay[x][y])
+  if (kill_x != -1 || kill_y != -1)
+  {
+    if (IS_PLAYER(good_x, good_y))
     {
-      Feld[x][y] = EL_AUSGANG_AUF;
-      DrawLevelField(x,y);
+      struct PlayerInfo *player = PLAYERINFO(good_x, good_y);
+
+      if (player->shield_deadly_time_left > 0)
+	Bang(kill_x, kill_y);
+      else if (!PLAYER_PROTECTED(good_x, good_y))
+	KillHero(player);
     }
+    else
+      Bang(good_x, good_y);
   }
 }
 
-void AusgangstuerBlinken(int x, int y)
+void TestIfBadThingHitsGoodThing(int bad_x, int bad_y, int bad_move_dir)
 {
-  DrawGraphicAnimation(x,y, GFX_AUSGANG_AUF, 4, 4, ANIM_OSCILLATE);
-}
+  int i, kill_x = -1, kill_y = -1;
+  int bad_element = Feld[bad_x][bad_y];
+  static int test_xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+  static int test_dir[4] =
+  {
+    MV_UP,
+    MV_LEFT,
+    MV_RIGHT,
+    MV_DOWN
+  };
 
-void EdelsteinFunkeln(int x, int y)
-{
-  if (!IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)) || IS_MOVING(x,y))
+  if (bad_element == EL_EXPLOSION)	/* skip just exploding bad things */
     return;
 
-  if (Feld[x][y] == EL_EDELSTEIN_BD)
-    DrawGraphicAnimation(x,y, GFX_EDELSTEIN_BD, 4, 4, ANIM_REVERSE);
-  else
+  for (i=0; i<4; i++)
   {
-    if (!MovDelay[x][y])	/* neue Phase / noch nicht gewartet */
-      MovDelay[x][y] = 11 * !SimpleRND(500);
+    int test_x, test_y, test_move_dir, test_element;
 
-    if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
-    {
-      MovDelay[x][y]--;
+    test_x = bad_x + test_xy[i][0];
+    test_y = bad_y + test_xy[i][1];
+    if (!IN_LEV_FIELD(test_x, test_y))
+      continue;
 
-      if (direct_draw_on && MovDelay[x][y])
-	SetDrawtoField(DRAW_BUFFERED);
+    test_move_dir =
+      (IS_MOVING(test_x, test_y) ? MovDir[test_x][test_y] : MV_NO_MOVING);
 
-      DrawGraphic(SCROLLX(x),SCROLLY(y), el2gfx(Feld[x][y]));
+    test_element = Feld[test_x][test_y];
 
-      if (MovDelay[x][y])
+    /* 1st case: good thing is moving towards DONT_RUN_INTO style bad thing;
+       2nd case: DONT_TOUCH style bad thing does not move away from good thing
+    */
+    if ((DONT_RUN_INTO(bad_element) &&  bad_move_dir == test_dir[i]) ||
+	(DONT_TOUCH(bad_element)    && test_move_dir != test_dir[i]))
+    {
+      /* good thing is player or penguin that does not move away */
+      if (IS_PLAYER(test_x, test_y))
       {
-	int src_x,src_y, dest_x,dest_y;
-	int phase = (MovDelay[x][y]-1)/2;
+	struct PlayerInfo *player = PLAYERINFO(test_x, test_y);
 
-	if (phase > 2)
-	  phase = 4-phase;
+	if (bad_element == EL_ROBOT && player->is_moving)
+	  continue;	/* robot does not kill player if he is moving */
 
-	src_x  = SX + GFX_PER_LINE*TILEX;
-	src_y  = SY + phase*TILEY;
-	dest_x = FX + SCROLLX(x)*TILEX;
-	dest_y = FY + SCROLLY(y)*TILEY;
-
-	/*
-	XSetClipOrigin(display,clip_gc[PIX_BACK],dest_x-src_x,dest_y-src_y);
-	XCopyArea(display,pix[PIX_BACK],drawto_field,clip_gc[PIX_BACK],
-		  src_x,src_y, TILEX,TILEY, dest_x,dest_y);
-		  */
-
-	XSetClipMask(display, tile_clip_gc,
-		     tile_clipmask[GFX_MASK_SPARKLING + phase]);
-	XSetClipOrigin(display, tile_clip_gc, dest_x,dest_y);
-	XCopyArea(display, pix[PIX_BACK], drawto_field, tile_clip_gc,
-		  src_x,src_y, TILEX,TILEY, dest_x,dest_y);
-
-	if (direct_draw_on)
-	{
-	  XCopyArea(display,drawto_field,window,gc,
-		    dest_x,dest_y, TILEX,TILEY, dest_x,dest_y);
-	  SetDrawtoField(DRAW_DIRECT);
-	}
+	kill_x = test_x;
+	kill_y = test_y;
+	break;
+      }
+      else if (test_element == EL_PENGUIN)
+      {
+	kill_x = test_x;
+	kill_y = test_y;
+	break;
       }
     }
   }
-}
-
-void MauerWaechst(int x, int y)
-{
-  int delay = 6;
 
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
-    MovDelay[x][y] = 3*delay;
-
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  if (kill_x != -1 || kill_y != -1)
   {
-    int phase;
+    if (IS_PLAYER(kill_x, kill_y))
+    {
+      struct PlayerInfo *player = PLAYERINFO(kill_x, kill_y);
 
-    MovDelay[x][y]--;
-    phase = 2-MovDelay[x][y]/delay;
-    if (!(MovDelay[x][y]%delay) && IN_SCR_FIELD(SCROLLX(x),SCROLLY(y)))
-      DrawGraphic(SCROLLX(x),SCROLLY(y),
-		  (Store[x][y]==MV_LEFT ? GFX_MAUER_L1 : GFX_MAUER_R1)+phase);
+#if 0
+      int dir = player->MovDir;
+      int newx = player->jx + (dir == MV_LEFT ? -1 : dir == MV_RIGHT ? +1 : 0);
+      int newy = player->jy + (dir == MV_UP   ? -1 : dir == MV_DOWN  ? +1 : 0);
 
-    if (!MovDelay[x][y])
-    {
-      if (Store[x][y]==MV_LEFT)
-      {
-	if (IN_LEV_FIELD(x-1,y) && IS_MAUER(Feld[x-1][y]))
-	  DrawLevelField(x-1,y);
-      }
+      if (Feld[bad_x][bad_y] == EL_ROBOT && player->is_moving &&
+	  newx != bad_x && newy != bad_y)
+	;	/* robot does not kill player if he is moving */
       else
-      {
-	if (IN_LEV_FIELD(x+1,y) && IS_MAUER(Feld[x+1][y]))
-	  DrawLevelField(x+1,y);
-      }
+	printf("-> %d\n", player->MovDir);
 
-      Feld[x][y] = EL_MAUER_LEBT;
-      Store[x][y] = 0;
-      DrawLevelField(x,y);
+      if (Feld[bad_x][bad_y] == EL_ROBOT && player->is_moving &&
+	  newx != bad_x && newy != bad_y)
+	;	/* robot does not kill player if he is moving */
+      else
+	;
+#endif
+
+      if (player->shield_deadly_time_left > 0)
+	Bang(bad_x, bad_y);
+      else if (!PLAYER_PROTECTED(kill_x, kill_y))
+	KillHero(player);
     }
+    else
+      Bang(kill_x, kill_y);
   }
 }
 
-void MauerAbleger(int ax, int ay)
+void TestIfHeroTouchesBadThing(int x, int y)
 {
-  BOOL links_frei = FALSE, rechts_frei = FALSE;
-  BOOL links_massiv = FALSE, rechts_massiv = FALSE;
-
-  if (!MovDelay[ax][ay])	/* neue Mauer / noch nicht gewartet */
-    MovDelay[ax][ay] = 6;
-
-  if (MovDelay[ax][ay])		/* neue Mauer / in Wartezustand */
-  {
-    MovDelay[ax][ay]--;
-    if (MovDelay[ax][ay])
-      return;
-  }
+  TestIfGoodThingHitsBadThing(x, y, MV_NO_MOVING);
+}
 
-  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;
+void TestIfHeroRunsIntoBadThing(int x, int y, int move_dir)
+{
+  TestIfGoodThingHitsBadThing(x, y, move_dir);
+}
 
-  if (links_frei)
-  {
-    Feld[ax-1][ay] = EL_MAUERND;
-    Store[ax-1][ay] = MV_LEFT;
-    if (IN_SCR_FIELD(SCROLLX(ax-1),SCROLLY(ay)))
-      DrawGraphic(SCROLLX(ax-1),SCROLLY(ay),GFX_MAUER_L1);
-  }
-  if (rechts_frei)
-  {
-    Feld[ax+1][ay] = EL_MAUERND;
-    Store[ax+1][ay] = MV_RIGHT;
-    if (IN_SCR_FIELD(SCROLLX(ax+1),SCROLLY(ay)))
-      DrawGraphic(SCROLLX(ax+1),SCROLLY(ay),GFX_MAUER_R1);
-  }
+void TestIfBadThingTouchesHero(int x, int y)
+{
+  TestIfBadThingHitsGoodThing(x, y, MV_NO_MOVING);
+}
 
-  if (links_frei || rechts_frei)
-    DrawLevelField(ax,ay);
+void TestIfBadThingRunsIntoHero(int x, int y, int move_dir)
+{
+  TestIfBadThingHitsGoodThing(x, y, move_dir);
+}
 
-  if (!IN_LEV_FIELD(ax-1,ay) || IS_MAUER(Feld[ax-1][ay]))
-    links_massiv = TRUE;
-  if (!IN_LEV_FIELD(ax+1,ay) || IS_MAUER(Feld[ax+1][ay]))
-    rechts_massiv = TRUE;
+void TestIfFriendTouchesBadThing(int x, int y)
+{
+  TestIfGoodThingHitsBadThing(x, y, MV_NO_MOVING);
+}
 
-  if (links_massiv && rechts_massiv)
-    Feld[ax][ay] = EL_MAUERWERK;
+void TestIfBadThingTouchesFriend(int x, int y)
+{
+  TestIfBadThingHitsGoodThing(x, y, MV_NO_MOVING);
 }
 
-void CheckForDragon(int x, int y)
+void TestIfBadThingTouchesOtherBadThing(int bad_x, int bad_y)
 {
-  int i,j;
-  BOOL dragon_found = FALSE;
+  int i, kill_x = bad_x, kill_y = bad_y;
   static int xy[4][2] =
   {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
   };
 
-  for(i=0;i<4;i++)
+  for (i=0; i<4; i++)
   {
-    for(j=0;j<4;j++)
-    {
-      int xx = x + j*xy[i][0], yy = y + j*xy[i][1];
+    int x, y, element;
 
-      if (IN_LEV_FIELD(xx,yy) &&
-	  (Feld[xx][yy] == EL_BURNING || Feld[xx][yy] == EL_DRACHE))
-      {
-	if (Feld[xx][yy] == EL_DRACHE)
-	  dragon_found = TRUE;
-      }
-      else
-	break;
-    }
-  }
+    x = bad_x + xy[i][0];
+    y = bad_y + xy[i][1];
+    if (!IN_LEV_FIELD(x, y))
+      continue;
 
-  if (!dragon_found)
-  {
-    for(i=0;i<4;i++)
+    element = Feld[x][y];
+    if (IS_AMOEBOID(element) || element == EL_GAME_OF_LIFE ||
+	element == EL_AMOEBA_GROWING || element == EL_AMOEBA_DROP)
     {
-      for(j=0;j<3;j++)
-      {
-  	int xx = x + j*xy[i][0], yy = y + j*xy[i][1];
-  
-  	if (IN_LEV_FIELD(xx,yy) && Feld[xx][yy] == EL_BURNING)
-  	{
-	  Feld[xx][yy] = EL_LEERRAUM;
-	  DrawLevelField(xx,yy);
-  	}
-  	else
-  	  break;
-      }
+      kill_x = x;
+      kill_y = y;
+      break;
     }
   }
+
+  if (kill_x != bad_x || kill_y != bad_y)
+    Bang(bad_x, bad_y);
 }
 
-void GameActions()
+void KillHero(struct PlayerInfo *player)
 {
-  static long action_delay = 0;
-  long action_delay_value;
-  int sieb_x = 0, sieb_y = 0;
-  int x, y, element;
+  int jx = player->jx, jy = player->jy;
 
-  if (game_status != PLAYING)
+  if (!player->active)
     return;
 
-#ifdef DEBUG
-  action_delay_value =
-    (tape.playing && tape.fast_forward ? FFWD_FRAME_DELAY : GameSpeed);
+  /* remove accessible field at the player's position */
+  Feld[jx][jy] = EL_EMPTY;
+
+  /* deactivate shield (else Bang()/Explode() would not work right) */
+  player->shield_normal_time_left = 0;
+  player->shield_deadly_time_left = 0;
+
+  Bang(jx, jy);
+  BuryHero(player);
+}
+
+static void KillHeroUnlessProtected(int x, int y)
+{
+  if (!PLAYER_PROTECTED(x, y))
+    KillHero(PLAYERINFO(x, y));
+}
+
+void BuryHero(struct PlayerInfo *player)
+{
+  int jx = player->jx, jy = player->jy;
+
+  if (!player->active)
+    return;
+
+#if 1
+  PlaySoundLevelElementAction(jx, jy, player->element_nr, ACTION_DYING);
 #else
-  action_delay_value =
-    (tape.playing && tape.fast_forward ? FFWD_FRAME_DELAY : GAME_FRAME_DELAY);
+  PlaySoundLevel(jx, jy, SND_CLASS_PLAYER_DYING);
 #endif
+  PlaySoundLevel(jx, jy, SND_GAME_LOSING);
 
-  if (PlayerMovPos)
-    ScrollFigure(0);
+  player->GameOver = TRUE;
+  RemoveHero(player);
+}
 
-  while(!DelayReached(&action_delay, action_delay_value))
-    Delay(5);
+void RemoveHero(struct PlayerInfo *player)
+{
+  int jx = player->jx, jy = player->jy;
+  int i, found = FALSE;
 
-  if (tape.pausing || (tape.playing && !TapePlayDelay()))
-    return;
-  else if (tape.recording)
-    TapeRecordDelay();
+  player->present = FALSE;
+  player->active = FALSE;
 
-  FrameCounter++;
-  TimeFrames++;
+  if (!ExplodeField[jx][jy])
+    StorePlayer[jx][jy] = 0;
 
-  for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
-  {
-    Stop[x][y] = FALSE;
-    if (JustHit[x][y]>0)
-      JustHit[x][y]--;
+  for (i=0; i<MAX_PLAYERS; i++)
+    if (stored_player[i].active)
+      found = TRUE;
 
-#if DEBUG
-    if (IS_BLOCKED(x,y))
-    {
-      int oldx,oldy;
+  if (!found)
+    AllPlayersGone = TRUE;
 
-      Blocked2Moving(x,y,&oldx,&oldy);
-      if (!IS_MOVING(oldx,oldy))
-      {
-	printf("GameActions(): (BLOCKED=>MOVING) context corrupted!\n");
-	printf("GameActions(): BLOCKED: x = %d, y = %d\n",x,y);
-	printf("GameActions(): !MOVING: oldx = %d, oldy = %d\n",oldx,oldy);
-	printf("GameActions(): This should never happen!\n");
-      }
-    }
-#endif
-  }
+  ExitX = ZX = jx;
+  ExitY = ZY = jy;
+}
 
-  for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
-  {
-    element = Feld[x][y];
+/*
+  =============================================================================
+  checkDiagonalPushing()
+  -----------------------------------------------------------------------------
+  check if diagonal input device direction results in pushing of object
+  (by checking if the alternative direction is walkable, diggable, ...)
+  =============================================================================
+*/
+
+static boolean checkDiagonalPushing(struct PlayerInfo *player,
+				    int x, int y, int real_dx, int real_dy)
+{
+  int jx, jy, dx, dy, xx, yy;
 
-    if (IS_INACTIVE(element))
-      continue;
+  if (real_dx == 0 || real_dy == 0)	/* no diagonal direction => push */
+    return TRUE;
 
-    if (!IS_MOVING(x,y) && (CAN_FALL(element) || CAN_MOVE(element)))
-    {
-      StartMoving(x,y);
+  /* diagonal direction: check alternative direction */
+  jx = player->jx;
+  jy = player->jy;
+  dx = x - jx;
+  dy = y - jy;
+  xx = jx + (dx == 0 ? real_dx : 0);
+  yy = jy + (dy == 0 ? real_dy : 0);
 
-      if (IS_GEM(element))
-	EdelsteinFunkeln(x,y);
-    }
-    else if (IS_MOVING(x,y))
-      ContinueMoving(x,y);
-    else if (element==EL_DYNAMIT || element==EL_DYNABOMB)
-      CheckDynamite(x,y);
-    else if (element==EL_EXPLODING)
-      Explode(x,y,Frame[x][y],EX_NORMAL);
-    else if (element==EL_AMOEBING)
-      AmoebeWaechst(x,y);
-    else if (IS_AMOEBALIVE(element))
-      AmoebeAbleger(x,y);
-    else if (element==EL_LIFE || element==EL_LIFE_ASYNC)
-      Life(x,y);
-    else if (element==EL_ABLENK_EIN)
-      Ablenk(x,y);
-    else if (element==EL_SALZSAEURE)
-      Blubber(x,y);
-    else if (element==EL_BLURB_LEFT || element==EL_BLURB_RIGHT)
-      Blurb(x,y);
-    else if (element==EL_CRACKINGNUT)
-      NussKnacken(x,y);
-    else if (element==EL_AUSGANG_ZU)
-      AusgangstuerPruefen(x,y);
-    else if (element==EL_AUSGANG_ACT)
-      AusgangstuerOeffnen(x,y);
-    else if (element==EL_AUSGANG_AUF)
-      AusgangstuerBlinken(x,y);
-    else if (element==EL_MAUERND)
-      MauerWaechst(x,y);
-    else if (element==EL_MAUER_LEBT)
-      MauerAbleger(x,y);
-    else if (element==EL_BURNING)
-      CheckForDragon(x,y);
+  return (!IN_LEV_FIELD(xx, yy) || IS_SOLID_FOR_PUSHING(Feld[xx][yy]));
+}
 
-    if (SiebAktiv)
-    {
-      BOOL sieb = FALSE;
+/*
+  =============================================================================
+  DigField()
+  -----------------------------------------------------------------------------
+  x, y:			field next to player (non-diagonal) to try to dig to
+  real_dx, real_dy:	direction as read from input device (can be diagonal)
+  =============================================================================
+*/
+
+int DigField(struct PlayerInfo *player,
+	     int x, int y, int real_dx, int real_dy, int mode)
+{
+  boolean use_spring_bug = (game.engine_version < VERSION_IDENT(2,2,0));
+  int jx = player->jx, jy = player->jy;
+  int dx = x - jx, dy = y - jy;
+  int nextx = x + dx, nexty = y + dy;
+  int move_direction = (dx == -1 ? MV_LEFT :
+			dx == +1 ? MV_RIGHT :
+			dy == -1 ? MV_UP :
+			dy == +1 ? MV_DOWN : MV_NO_MOVING);
+  int element;
 
-      if (element==EL_SIEB_LEER || element==EL_SIEB_VOLL ||
-	  Store[x][y]==EL_SIEB_LEER)
-      {
-	SiebAktivieren(x, y, 1);
-	sieb = TRUE;
-      }
-      else if (element==EL_SIEB2_LEER || element==EL_SIEB2_VOLL ||
-	       Store[x][y]==EL_SIEB2_LEER)
-      {
-	SiebAktivieren(x, y, 2);
-	sieb = TRUE;
-      }
+  if (player->MovPos == 0)
+  {
+    player->is_digging = FALSE;
+    player->is_collecting = FALSE;
+  }
 
-      if (sieb && ABS(x-JX)+ABS(y-JY) < ABS(sieb_x-JX)+ABS(sieb_y-JY))
-      {
-	sieb_x = x;
-	sieb_y = y;
-      }
-    }
+  if (player->MovPos == 0)	/* last pushing move finished */
+    player->Pushing = FALSE;
+
+  if (mode == DF_NO_PUSH)	/* player just stopped pushing */
+  {
+    player->Switching = FALSE;
+    player->push_delay = 0;
+
+    return MF_NO_ACTION;
   }
 
-  if (SiebAktiv)
+  if (IS_MOVING(x, y) || IS_PLAYER(x, y))
+    return MF_NO_ACTION;
+
+#if 0
+  if (IS_TUBE(Feld[jx][jy]) || IS_TUBE(Back[jx][jy]))
+#else
+  if (IS_TUBE(Feld[jx][jy]) ||
+      (IS_TUBE(Back[jx][jy]) && game.engine_version >= VERSION_IDENT(2,2,0)))
+#endif
   {
-    if (!(SiebAktiv%4))
-      PlaySoundLevel(sieb_x,sieb_y,SND_MIEP);
-    SiebAktiv--;
-    if (!SiebAktiv)
+    int i = 0;
+    int tube_element = (IS_TUBE(Feld[jx][jy]) ? Feld[jx][jy] : Back[jx][jy]);
+    int tube_leave_directions[][2] =
     {
-      for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
-      {
-	element = Feld[x][y];
-	if (element==EL_SIEB_LEER || element==EL_SIEB_VOLL)
-	{
-	  Feld[x][y] = EL_SIEB_TOT;
-	  DrawLevelField(x,y);
-	}
-	else if (element==EL_SIEB2_LEER || element==EL_SIEB2_VOLL)
-	{
-	  Feld[x][y] = EL_SIEB2_TOT;
-	  DrawLevelField(x,y);
-	}
-      }
+      { EL_TUBE_ANY,			MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
+      { EL_TUBE_VERTICAL,		                     MV_UP | MV_DOWN },
+      { EL_TUBE_HORIZONTAL,		MV_LEFT | MV_RIGHT                   },
+      { EL_TUBE_VERTICAL_LEFT,		MV_LEFT |            MV_UP | MV_DOWN },
+      { EL_TUBE_VERTICAL_RIGHT,		          MV_RIGHT | MV_UP | MV_DOWN },
+      { EL_TUBE_HORIZONTAL_UP,		MV_LEFT | MV_RIGHT | MV_UP           },
+      { EL_TUBE_HORIZONTAL_DOWN,	MV_LEFT | MV_RIGHT |         MV_DOWN },
+      { EL_TUBE_LEFT_UP,		MV_LEFT |            MV_UP           },
+      { EL_TUBE_LEFT_DOWN,		MV_LEFT |                    MV_DOWN },
+      { EL_TUBE_RIGHT_UP,		          MV_RIGHT | MV_UP           },
+      { EL_TUBE_RIGHT_DOWN,		          MV_RIGHT |         MV_DOWN },
+      { -1,                     	MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN }
+    };
+
+    while (tube_leave_directions[i][0] != tube_element)
+    {
+      i++;
+      if (tube_leave_directions[i][0] == -1)	/* should not happen */
+	break;
     }
-  }
 
-  if (TimeLeft>0 && TimeFrames>=(100/GameSpeed) && !tape.pausing)
-  {
-    TimeFrames = 0;
-    TimeLeft--;
+    if (!(tube_leave_directions[i][1] & move_direction))
+      return MF_NO_ACTION;	/* tube has no opening in this direction */
+  }
 
-    if (tape.recording || tape.playing)
-      DrawVideoDisplay(VIDEO_STATE_TIME_ON,level.time-TimeLeft);
+  element = Feld[x][y];
 
-    if (TimeLeft<=10)
-      PlaySoundStereo(SND_GONG,PSND_MAX_RIGHT);
+  if (mode == DF_SNAP && !IS_SNAPPABLE(element) &&
+      game.engine_version >= VERSION_IDENT(2,2,0))
+    return MF_NO_ACTION;
 
-    DrawText(DX_TIME,DY_TIME,int2str(TimeLeft,3),FS_SMALL,FC_YELLOW);
+  switch (element)
+  {
+    case EL_ROBOT_WHEEL:
+      Feld[x][y] = EL_ROBOT_WHEEL_ACTIVE;
+      ZX = x;
+      ZY = y;
+      DrawLevelField(x, y);
+      PlaySoundLevel(x, y, SND_ROBOT_WHEEL_ACTIVATING);
+      return MF_ACTION;
+      break;
 
-    if (!TimeLeft)
-      KillHero();
-  }
+    case EL_SP_TERMINAL:
+      {
+	int xx, yy;
 
-  DrawPlayerField();
-}
+	PlaySoundLevel(x, y, SND_SP_TERMINAL_ACTIVATING);
 
-void ScrollLevel(int dx, int dy)
-{
-  int softscroll_offset = (soft_scrolling_on ? TILEX : 0);
-  int x,y;
+	for (yy=0; yy<lev_fieldy; yy++)
+	{
+	  for (xx=0; xx<lev_fieldx; xx++)
+	  {
+	    if (Feld[xx][yy] == EL_SP_DISK_YELLOW)
+	      Bang(xx, yy);
+	    else if (Feld[xx][yy] == EL_SP_TERMINAL)
+	      Feld[xx][yy] = EL_SP_TERMINAL_ACTIVE;
+	  }
+	}
 
-  ScreenMovPos = PlayerGfxPos;
+	return MF_ACTION;
+      }
+      break;
 
-  XCopyArea(display,drawto_field,drawto_field,gc,
-	    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);
+    case EL_CONVEYOR_BELT_1_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_1_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_1_SWITCH_RIGHT:
+    case EL_CONVEYOR_BELT_2_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_2_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_2_SWITCH_RIGHT:
+    case EL_CONVEYOR_BELT_3_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_3_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_3_SWITCH_RIGHT:
+    case EL_CONVEYOR_BELT_4_SWITCH_LEFT:
+    case EL_CONVEYOR_BELT_4_SWITCH_MIDDLE:
+    case EL_CONVEYOR_BELT_4_SWITCH_RIGHT:
+      if (!player->Switching)
+      {
+	player->Switching = TRUE;
+	ToggleBeltSwitch(x, y);
+	PlaySoundLevel(x, y, SND_CLASS_CONVEYOR_BELT_SWITCH_ACTIVATING);
+      }
+      return MF_ACTION;
+      break;
 
-  if (dx)
-  {
-    x = (dx==1 ? BX1 : BX2);
-    for(y=BY1; y<=BY2; y++)
-      DrawScreenField(x,y);
-  }
-  if (dy)
-  {
-    y = (dy==1 ? BY1 : BY2);
-    for(x=BX1; x<=BX2; x++)
-      DrawScreenField(x,y);
-  }
+    case EL_SWITCHGATE_SWITCH_UP:
+    case EL_SWITCHGATE_SWITCH_DOWN:
+      if (!player->Switching)
+      {
+	player->Switching = TRUE;
+	ToggleSwitchgateSwitch(x, y);
+	PlaySoundLevel(x, y, SND_CLASS_SWITCHGATE_SWITCH_ACTIVATING);
+      }
+      return MF_ACTION;
+      break;
 
-  redraw_mask |= REDRAW_FIELD;
-}
+    case EL_LIGHT_SWITCH:
+    case EL_LIGHT_SWITCH_ACTIVE:
+      if (!player->Switching)
+      {
+	player->Switching = TRUE;
+	ToggleLightSwitch(x, y);
+	PlaySoundLevel(x, y, element == EL_LIGHT_SWITCH ?
+		       SND_LIGHT_SWITCH_ACTIVATING :
+		       SND_LIGHT_SWITCH_DEACTIVATING);
+      }
+      return MF_ACTION;
+      break;
 
-BOOL MoveFigureOneStep(int dx, int dy, int real_dx, int real_dy)
-{
-  int newJX = JX+dx, newJY = JY+dy;
-  int element;
-  int can_move;
+    case EL_TIMEGATE_SWITCH:
+      ActivateTimegateSwitch(x, y);
+      PlaySoundLevel(x, y, SND_TIMEGATE_SWITCH_ACTIVATING);
 
-  if (PlayerGone || (!dx && !dy))
-    return(MF_NO_ACTION);
+      return MF_ACTION;
+      break;
 
-  PlayerMovDir = (dx < 0 ? MV_LEFT :
-		  dx > 0 ? MV_RIGHT :
-		  dy < 0 ? MV_UP :
-		  dy > 0 ? MV_DOWN :	MV_NO_MOVING);
+    case EL_BALLOON_SWITCH_LEFT:
+    case EL_BALLOON_SWITCH_RIGHT:
+    case EL_BALLOON_SWITCH_UP:
+    case EL_BALLOON_SWITCH_DOWN:
+    case 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);
+      PlaySoundLevel(x, y, SND_CLASS_BALLOON_SWITCH_ACTIVATING);
+
+      return MF_ACTION;
+      break;
 
-  if (!IN_LEV_FIELD(newJX,newJY))
-    return(MF_NO_ACTION);
+    case EL_SP_PORT_LEFT:
+    case EL_SP_PORT_RIGHT:
+    case EL_SP_PORT_UP:
+    case EL_SP_PORT_DOWN:
+    case EL_SP_PORT_HORIZONTAL:
+    case EL_SP_PORT_VERTICAL:
+    case EL_SP_PORT_ANY:
+    case EL_SP_GRAVITY_PORT_LEFT:
+    case EL_SP_GRAVITY_PORT_RIGHT:
+    case EL_SP_GRAVITY_PORT_UP:
+    case EL_SP_GRAVITY_PORT_DOWN:
+      if ((dx == -1 &&
+	   element != EL_SP_PORT_LEFT &&
+	   element != EL_SP_GRAVITY_PORT_LEFT &&
+	   element != EL_SP_PORT_HORIZONTAL &&
+	   element != EL_SP_PORT_ANY) ||
+	  (dx == +1 &&
+	   element != EL_SP_PORT_RIGHT &&
+	   element != EL_SP_GRAVITY_PORT_RIGHT &&
+	   element != EL_SP_PORT_HORIZONTAL &&
+	   element != EL_SP_PORT_ANY) ||
+	  (dy == -1 &&
+	   element != EL_SP_PORT_UP &&
+	   element != EL_SP_GRAVITY_PORT_UP &&
+	   element != EL_SP_PORT_VERTICAL &&
+	   element != EL_SP_PORT_ANY) ||
+	  (dy == +1 &&
+	   element != EL_SP_PORT_DOWN &&
+	   element != EL_SP_GRAVITY_PORT_DOWN &&
+	   element != EL_SP_PORT_VERTICAL &&
+	   element != EL_SP_PORT_ANY) ||
+	  !IN_LEV_FIELD(nextx, nexty) ||
+	  !IS_FREE(nextx, nexty))
+	return MF_NO_ACTION;
+
+      /* automatically move to the next field with double speed */
+      player->programmed_action = move_direction;
+      DOUBLE_PLAYER_SPEED(player);
+
+      PlaySoundLevel(x, y, SND_CLASS_SP_PORT_PASSING);
+      break;
 
-  element = MovingOrBlocked2Element(newJX,newJY);
+    case EL_TUBE_ANY:
+    case EL_TUBE_VERTICAL:
+    case EL_TUBE_HORIZONTAL:
+    case EL_TUBE_VERTICAL_LEFT:
+    case EL_TUBE_VERTICAL_RIGHT:
+    case EL_TUBE_HORIZONTAL_UP:
+    case EL_TUBE_HORIZONTAL_DOWN:
+    case EL_TUBE_LEFT_UP:
+    case EL_TUBE_LEFT_DOWN:
+    case EL_TUBE_RIGHT_UP:
+    case EL_TUBE_RIGHT_DOWN:
+      {
+	int i = 0;
+	int tube_enter_directions[][2] =
+	{
+	  { EL_TUBE_ANY,		MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
+	  { EL_TUBE_VERTICAL,		                     MV_UP | MV_DOWN },
+	  { EL_TUBE_HORIZONTAL,		MV_LEFT | MV_RIGHT                   },
+	  { EL_TUBE_VERTICAL_LEFT,	          MV_RIGHT | MV_UP | MV_DOWN },
+	  { EL_TUBE_VERTICAL_RIGHT,	MV_LEFT            | MV_UP | MV_DOWN },
+	  { EL_TUBE_HORIZONTAL_UP,	MV_LEFT | MV_RIGHT |         MV_DOWN },
+	  { EL_TUBE_HORIZONTAL_DOWN,	MV_LEFT | MV_RIGHT | MV_UP           },
+	  { EL_TUBE_LEFT_UP,			  MV_RIGHT |         MV_DOWN },
+	  { EL_TUBE_LEFT_DOWN,			  MV_RIGHT | MV_UP           },
+	  { EL_TUBE_RIGHT_UP,		MV_LEFT |                    MV_DOWN },
+	  { EL_TUBE_RIGHT_DOWN,		MV_LEFT |            MV_UP           },
+	  { -1,				MV_NO_MOVING                         }
+	};
+
+	while (tube_enter_directions[i][0] != element)
+	{
+	  i++;
+	  if (tube_enter_directions[i][0] == -1)	/* should not happen */
+	    break;
+	}
 
-  if (DONT_GO_TO(element))
-  {
-    if (element==EL_SALZSAEURE && dx==0 && dy==1)
-    {
-      Blurb(JX,JY);
-      Feld[JX][JY] = EL_SPIELFIGUR;
-      InitMovingField(JX,JY,MV_DOWN);
-      Store[JX][JY] = EL_SALZSAEURE;
-      ContinueMoving(JX,JY);
-      BuryHero();
-    }
-    else
-      KillHero();
+	if (!(tube_enter_directions[i][1] & move_direction))
+	  return MF_NO_ACTION;	/* tube has no opening in this direction */
 
-    return(MF_MOVING);
-  }
+	PlaySoundLevel(x, y, SND_CLASS_TUBE_WALKING);
+      }
+      break;
 
-  can_move = DigField(newJX,newJY, real_dx,real_dy, DF_DIG);
-  if (can_move != MF_MOVING)
-    return(can_move);
+    case EL_LAMP:
+      Feld[x][y] = EL_LAMP_ACTIVE;
+      local_player->lights_still_needed--;
+      DrawLevelField(x, y);
+      PlaySoundLevel(x, y, SND_LAMP_ACTIVATING);
+      return MF_ACTION;
+      break;
 
-  lastJX = JX;
-  lastJY = JY;
-  JX = newJX;
-  JY = newJY;
+    case EL_TIME_ORB_FULL:
+      Feld[x][y] = EL_TIME_ORB_EMPTY;
+      TimeLeft += 10;
+      DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FONT_TEXT_2);
+      DrawLevelField(x, y);
+      PlaySoundStereo(SND_TIME_ORB_FULL_COLLECTING, SOUND_MIDDLE);
+      return MF_ACTION;
+      break;
 
-  PlayerMovPos = (dx > 0 || dy > 0 ? -1 : 1) * 7*TILEX/8;
+    default:
 
-  ScrollFigure(-1);
+      if (IS_WALKABLE(element))
+      {
+	int sound_action = ACTION_WALKING;
 
-  return(MF_MOVING);
-}
+	if (element >= EL_GATE_1 && element <= EL_GATE_4)
+	{
+	  if (!player->key[element - EL_GATE_1])
+	    return MF_NO_ACTION;
+	}
+	else if (element >= EL_GATE_1_GRAY && element <= EL_GATE_4_GRAY)
+	{
+	  if (!player->key[element - EL_GATE_1_GRAY])
+	    return MF_NO_ACTION;
+	}
+	else if (element == EL_EXIT_OPEN || element == EL_SP_EXIT_OPEN)
+	{
+	  sound_action = ACTION_PASSING;	/* player is passing exit */
+	}
+	else if (element == EL_EMPTY)
+	{
+	  sound_action = ACTION_MOVING;		/* nothing to walk on */
+	}
 
-BOOL MoveFigure(int dx, int dy)
-{
-  static long move_delay = 0;
-  static int last_move_dir = MV_NO_MOVING;
-  int moved = MF_NO_ACTION;
-  int oldJX = JX, oldJY = JY;
+	/* play sound from background or player, whatever is available */
+	if (element_info[element].sound[sound_action] != SND_UNDEFINED)
+	  PlaySoundLevelElementAction(x, y, element, sound_action);
+	else
+	  PlaySoundLevelElementAction(x, y, player->element_nr, sound_action);
 
-  if (PlayerGone || (!dx && !dy))
-    return(FALSE);
+	break;
+      }
+      else if (IS_PASSABLE(element))
+      {
+	if (!IN_LEV_FIELD(nextx, nexty) || !IS_FREE(nextx, nexty))
+	  return MF_NO_ACTION;
 
-  if (!FrameReached(&move_delay,MoveSpeed) && !tape.playing)
-    return(FALSE);
+	if (element >= EL_EM_GATE_1 && element <= EL_EM_GATE_4)
+	{
+	  if (!player->key[element - EL_EM_GATE_1])
+	    return MF_NO_ACTION;
+	}
+	else if (element >= EL_EM_GATE_1_GRAY && element <= EL_EM_GATE_4_GRAY)
+	{
+	  if (!player->key[element - EL_EM_GATE_1_GRAY])
+	    return MF_NO_ACTION;
+	}
 
-  if (last_move_dir & (MV_LEFT | MV_RIGHT))
-  {
-    if (!(moved |= MoveFigureOneStep(0,dy, dx,dy)))
-      moved |= MoveFigureOneStep(dx,0, dx,dy);
-  }
-  else
-  {
-    if (!(moved |= MoveFigureOneStep(dx,0, dx,dy)))
-      moved |= MoveFigureOneStep(0,dy, dx,dy);
-  }
+	/* automatically move to the next field with double speed */
+	player->programmed_action = move_direction;
+	DOUBLE_PLAYER_SPEED(player);
 
-  last_move_dir = MV_NO_MOVING;
+	PlaySoundLevelAction(x, y, ACTION_PASSING);
 
-  if (moved & MF_MOVING)
-  {
-    int old_scroll_x = scroll_x, old_scroll_y = scroll_y;
-    int offset = (scroll_delay_on ? 3 : 0);
+	break;
+      }
+      else if (IS_DIGGABLE(element))
+      {
+	RemoveField(x, y);
 
-    if ((scroll_x < JX-MIDPOSX-offset || scroll_x > JX-MIDPOSX+offset) &&
-	JX >= MIDPOSX-1-offset && JX <= lev_fieldx-(MIDPOSX-offset))
-      scroll_x = JX-MIDPOSX + (scroll_x < JX-MIDPOSX ? -offset : offset);
-    if ((scroll_y < JY-MIDPOSY-offset || scroll_y > JY-MIDPOSY+offset) &&
-	JY >= MIDPOSY-1-offset && JY <= lev_fieldy-(MIDPOSY-offset))
-      scroll_y = JY-MIDPOSY + (scroll_y < JY-MIDPOSY ? -offset : offset);
+	if (mode != DF_SNAP)
+	{
+	  GfxElement[x][y] =
+	    (CAN_BE_CRUMBLED(element) ? EL_SAND : GFX_ELEMENT(element));
+	  player->is_digging = TRUE;
+	}
 
-    if (scroll_x != old_scroll_x || scroll_y != old_scroll_y)
-      ScrollLevel(old_scroll_x - scroll_x, old_scroll_y - scroll_y);
-  }
+	PlaySoundLevelElementAction(x, y, element, ACTION_DIGGING);
 
-  if (!(moved & MF_MOVING) && !PlayerPushing)
-    PlayerFrame = 0;
-  else
-    PlayerFrame = (PlayerFrame + 1) % 4;
+	break;
+      }
+      else if (IS_COLLECTIBLE(element))
+      {
+	RemoveField(x, y);
 
-  if (moved & MF_MOVING)
-  {
-    if (oldJX != JX && oldJY == JY)
-      PlayerMovDir = (oldJX < JX ? MV_RIGHT : MV_LEFT);
-    else if (oldJX == JX && oldJY != JY)
-      PlayerMovDir = (oldJY < JY ? MV_DOWN : MV_UP);
+	if (mode != DF_SNAP)
+	{
+	  GfxElement[x][y] = element;
+	  player->is_collecting = TRUE;
+	}
 
-    DrawLevelField(JX,JY);	/* für "ErdreichAnbroeckeln()" */
+	if (element == EL_SPEED_PILL)
+	  player->move_delay_value = MOVE_DELAY_HIGH_SPEED;
+	else if (element == EL_EXTRA_TIME && level.time > 0)
+	{
+	  TimeLeft += 10;
+	  DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FONT_TEXT_2);
+	}
+	else if (element == EL_SHIELD_NORMAL || element == EL_SHIELD_DEADLY)
+	{
+	  player->shield_normal_time_left += 10;
+	  if (element == EL_SHIELD_DEADLY)
+	    player->shield_deadly_time_left += 10;
+	}
+	else if (element == EL_DYNAMITE || element == EL_SP_DISK_RED)
+	{
+	  player->dynamite++;
+	  player->use_disk_red_graphic = (element == EL_SP_DISK_RED);
 
-    last_move_dir = PlayerMovDir;
-  }
+	  DrawText(DX_DYNAMITE, DY_DYNAMITE,
+		   int2str(local_player->dynamite, 3), FONT_TEXT_2);
+	}
+	else if (element == EL_DYNABOMB_INCREASE_NUMBER)
+	{
+	  player->dynabomb_count++;
+	  player->dynabombs_left++;
+	}
+	else if (element == EL_DYNABOMB_INCREASE_SIZE)
+	{
+	  player->dynabomb_size++;
+	}
+	else if (element == EL_DYNABOMB_INCREASE_POWER)
+	{
+	  player->dynabomb_xl = TRUE;
+	}
+	else if ((element >= EL_KEY_1 && element <= EL_KEY_4) ||
+		 (element >= EL_EM_KEY_1 && element <= EL_EM_KEY_4))
+	{
+	  int key_nr = (element >= EL_KEY_1 && element <= EL_KEY_4 ?
+			element - EL_KEY_1 : element - EL_EM_KEY_1);
 
-  TestIfHeroHitsBadThing();
+	  player->key[key_nr] = TRUE;
 
-  if (PlayerGone)
-    RemoveHero();
+	  DrawMiniGraphicExt(drawto, DX_KEYS + key_nr * MINI_TILEX, DY_KEYS,
+			     el2edimg(EL_KEY_1 + key_nr));
+	  redraw_mask |= REDRAW_DOOR_1;
+	}
+	else if (element_info[element].gem_count > 0)
+	{
+	  local_player->gems_still_needed -=
+	    element_info[element].gem_count;
+	  if (local_player->gems_still_needed < 0)
+	    local_player->gems_still_needed = 0;
 
-  return(moved);
-}
+	  DrawText(DX_EMERALDS, DY_EMERALDS,
+		   int2str(local_player->gems_still_needed, 3), FONT_TEXT_2);
+	}
 
-void ScrollFigure(int init)
-{
-  static long actual_frame_counter = 0;
+	RaiseScoreElement(element);
+	PlaySoundLevelElementAction(x, y, element, ACTION_COLLECTING);
 
-  if (init)
-  {
-    PlayerGfxPos = ScrollStepSize * (PlayerMovPos / ScrollStepSize);
-    actual_frame_counter = FrameCounter;
+	CheckTriggeredElementChange(x, y, element, CE_OTHER_GETS_COLLECTED);
 
-    /*
-    if (Feld[lastJX][lastJY] == EL_LEERRAUM &&
-	IN_LEV_FIELD(lastJX,lastJY-1) &&
-	CAN_FALL(Feld[lastJX][lastJY-1]))
-      Feld[lastJX][lastJY] = EL_PLAYER_IS_LEAVING;
-      */
+	break;
+      }
+      else if (IS_PUSHABLE(element))
+      {
+	if (mode == DF_SNAP && element != EL_BD_ROCK)
+	  return MF_NO_ACTION;
 
-    if (Feld[lastJX][lastJY] == EL_LEERRAUM)
-      Feld[lastJX][lastJY] = EL_PLAYER_IS_LEAVING;
+	if (CAN_FALL(element) && dy)
+	  return MF_NO_ACTION;
 
-    DrawPlayerField();
-    return;
-  }
-  else if (!FrameReached(&actual_frame_counter,1))
-    return;
+	if (CAN_FALL(element) && IN_LEV_FIELD(x, y + 1) && IS_FREE(x, y + 1) &&
+	    !(element == EL_SPRING && use_spring_bug))
+	  return MF_NO_ACTION;
 
-  PlayerMovPos += (PlayerMovPos > 0 ? -1 : 1) * TILEX/8;
-  PlayerGfxPos = ScrollStepSize * (PlayerMovPos / ScrollStepSize);
+	if (element == EL_SPRING && MovDir[x][y] != MV_NO_MOVING)
+	  return MF_NO_ACTION;
 
-  if (ScreenMovPos && ScreenMovPos != PlayerGfxPos)
-  {
-    ScreenMovPos = PlayerGfxPos;
-    redraw_mask |= REDRAW_FIELD;
-  }
+	if (!player->Pushing &&
+	    game.engine_version >= RELEASE_IDENT(2,2,0,7))
+	  player->push_delay_value = GET_NEW_PUSH_DELAY(element);
 
-  if (Feld[lastJX][lastJY] == EL_PLAYER_IS_LEAVING)
-    Feld[lastJX][lastJY] = EL_LEERRAUM;
+	player->Pushing = TRUE;
 
-  DrawPlayerField();
+	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;
 
-  if (!PlayerMovPos)
-  {
-    lastJX = JX;
-    lastJY = JY;
-  }
-}
+	if (!checkDiagonalPushing(player, x, y, real_dx, real_dy))
+	  return MF_NO_ACTION;
 
-void TestIfGoodThingHitsBadThing(int goodx, int goody)
-{
-  int i, killx = goodx, killy = goody;
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
-  static int harmless[4] =
-  {
-    MV_UP,
-    MV_LEFT,
-    MV_RIGHT,
-    MV_DOWN
-  };
+	if (player->push_delay == 0)	/* new pushing; restart delay */
+	  player->push_delay = FrameCounter;
 
-  for(i=0;i<4;i++)
-  {
-    int x,y,element;
+	if (!FrameReached(&player->push_delay, player->push_delay_value) &&
+	    !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
+	    element != EL_SPRING && element != EL_BALLOON)
+	  return MF_NO_ACTION;
 
-    x = goodx+xy[i][0];
-    y = goody+xy[i][1];
-    if (!IN_LEV_FIELD(x,y))
-      continue;
+	if (IS_SB_ELEMENT(element))
+	{
+	  if (element == EL_SOKOBAN_FIELD_FULL)
+	  {
+	    Back[x][y] = EL_SOKOBAN_FIELD_EMPTY;
+	    local_player->sokobanfields_still_needed++;
+	  }
 
-    element = Feld[x][y];
+	  if (Feld[nextx][nexty] == EL_SOKOBAN_FIELD_EMPTY)
+	  {
+	    Back[nextx][nexty] = EL_SOKOBAN_FIELD_EMPTY;
+	    local_player->sokobanfields_still_needed--;
+	  }
 
-    if (DONT_TOUCH(element))
-    {
-      if (MovDir[x][y]==harmless[i])
-	continue;
+	  Feld[x][y] = EL_SOKOBAN_OBJECT;
 
-      killx = x;
-      killy = y;
-      break;
-    }
-  }
+	  if (Back[x][y] == Back[nextx][nexty])
+	    PlaySoundLevelAction(x, y, ACTION_PUSHING);
+	  else if (Back[x][y] != 0)
+	    PlaySoundLevelElementAction(x, y, EL_SOKOBAN_FIELD_FULL,
+					ACTION_EMPTYING);
+	  else
+	    PlaySoundLevelElementAction(nextx, nexty, EL_SOKOBAN_FIELD_EMPTY,
+					ACTION_FILLING);
 
-  if (killx!=goodx || killy!=goody)
-  {
-    if (IS_PLAYER(goodx,goody))
-      KillHero();
-    else
-      Bang(goodx,goody);
-  }
-}
+	  if (local_player->sokobanfields_still_needed == 0 &&
+	      game.emulation == EMU_SOKOBAN)
+	  {
+	    player->LevelSolved = player->GameOver = TRUE;
+	    PlaySoundLevel(x, y, SND_GAME_SOKOBAN_SOLVING);
+	  }
+	}
+	else
+	  PlaySoundLevelElementAction(x, y, element, ACTION_PUSHING);
 
-void TestIfBadThingHitsGoodThing(int badx, int bady)
-{
-  int i, killx = badx, killy = bady;
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
-  static int harmless[4] =
-  {
-    MV_UP,
-    MV_LEFT,
-    MV_RIGHT,
-    MV_DOWN
-  };
+	InitMovingField(x, y, move_direction);
 
-  for(i=0;i<4;i++)
-  {
-    int x,y,element;
+	if (mode == DF_SNAP)
+	  ContinueMoving(x, y);
+	else
+	  MovPos[x][y] = (dx != 0 ? dx : dy);
 
-    x = badx+xy[i][0];
-    y = bady+xy[i][1];
-    if (!IN_LEV_FIELD(x,y))
-      continue;
+	Pushed[x][y] = TRUE;
+	Pushed[nextx][nexty] = TRUE;
 
-    element = Feld[x][y];
+	if (game.engine_version < RELEASE_IDENT(2,2,0,7))
+	  player->push_delay_value = GET_NEW_PUSH_DELAY(element);
 
-    if (element==EL_PINGUIN)
-    {
-      if (MovDir[x][y]==harmless[i] && IS_MOVING(x,y))
-	continue;
+	CheckTriggeredElementChange(x, y, element, CE_OTHER_GETS_PUSHED);
+	CheckElementChange(x, y, element, CE_PUSHED_BY_PLAYER);
 
-      killx = x;
-      killy = y;
-      break;
-    }
+	break;
+      }
+      else
+      {
+	CheckTriggeredElementChange(x, y, element, CE_OTHER_GETS_PRESSED);
+	CheckElementChange(x, y, element, CE_PRESSED_BY_PLAYER);
+      }
+
+      return MF_NO_ACTION;
   }
 
-  if (killx!=badx || killy!=bady)
-    Bang(killx,killy);
-}
+  player->push_delay = 0;
 
-void TestIfHeroHitsBadThing()
-{
-  TestIfGoodThingHitsBadThing(JX,JY);
-}
+  if (Feld[x][y] != element)		/* really digged/collected something */
+    player->is_collecting = !player->is_digging;
 
-void TestIfBadThingHitsHero()
-{
-  TestIfGoodThingHitsBadThing(JX,JY);
-  /* (no typo!) */
+  return MF_MOVING;
 }
 
-void TestIfFriendHitsBadThing(int x, int y)
+boolean SnapField(struct PlayerInfo *player, int dx, int dy)
 {
-  TestIfGoodThingHitsBadThing(x,y);
-}
+  int jx = player->jx, jy = player->jy;
+  int x = jx + dx, y = jy + dy;
+  int snap_direction = (dx == -1 ? MV_LEFT :
+			dx == +1 ? MV_RIGHT :
+			dy == -1 ? MV_UP :
+			dy == +1 ? MV_DOWN : MV_NO_MOVING);
 
-void TestIfBadThingHitsFriend(int x, int y)
-{
-  TestIfBadThingHitsGoodThing(x,y);
-}
+  if (player->MovPos && game.engine_version >= VERSION_IDENT(2,2,0))
+    return FALSE;
 
-void TestIfBadThingHitsOtherBadThing(int badx, int bady)
-{
-  int i, killx=badx, killy=bady;
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
+  if (!player->active || !IN_LEV_FIELD(x, y))
+    return FALSE;
+
+  if (dx && dy)
+    return FALSE;
 
-  for(i=0;i<4;i++)
+  if (!dx && !dy)
   {
-    int x,y,element;
+    if (player->MovPos == 0)
+      player->Pushing = FALSE;
 
-    x=badx+xy[i][0];
-    y=bady+xy[i][1];
-    if (!IN_LEV_FIELD(x,y))
-      continue;
+    player->snapped = FALSE;
 
-    element=Feld[x][y];
-    if (IS_AMOEBOID(element) || element==EL_LIFE ||
-	element==EL_AMOEBING ||	element==EL_TROPFEN)
+    if (player->MovPos == 0)
     {
-      killx=x;
-      killy=y;
-      break;
+      player->is_digging = FALSE;
+      player->is_collecting = FALSE;
     }
-  }
-
-  if (killx!=badx || killy!=bady)
-    Bang(badx,bady);
-}
-
-void KillHero()
-{
-  if (PlayerGone)
-    return;
 
-  if (IS_PFORTE(Feld[JX][JY]))
-    Feld[JX][JY] = EL_LEERRAUM;
+    return FALSE;
+  }
 
-  Bang(JX,JY);
-  BuryHero();
-}
+  if (player->snapped)
+    return FALSE;
 
-void BuryHero()
-{
-  if (PlayerGone)
-    return;
+  player->MovDir = snap_direction;
 
-  PlaySoundLevel(JX,JY,SND_AUTSCH);
-  PlaySoundLevel(JX,JY,SND_LACHEN);
+  if (DigField(player, x, y, 0, 0, DF_SNAP) == MF_NO_ACTION)
+    return FALSE;
 
-  GameOver = TRUE;
-  RemoveHero();
-}
+  player->snapped = TRUE;
+  player->is_digging = FALSE;
+  player->is_collecting = FALSE;
 
-void RemoveHero()
-{
-  PlayerGone = TRUE;
+  DrawLevelField(x, y);
+  BackToFront();
 
-  ExitX = ZX = JX;
-  ExitY = ZY = JY;
-  JX = JY = -1;
+  return TRUE;
 }
 
-int DigField(int x, int y, int real_dx, int real_dy, int mode)
+boolean PlaceBomb(struct PlayerInfo *player)
 {
-  int dx = x-JX, dy = y-JY;
+  int jx = player->jx, jy = player->jy;
   int element;
-  static long push_delay = 0;
-  static int push_delay_value = 5;
 
-  if (!PlayerMovPos)
-    PlayerPushing = FALSE;
+  if (!player->active || player->MovPos)
+    return FALSE;
 
-  if (mode == DF_NO_PUSH)
-  {
-    push_delay = 0;
-    return(MF_NO_ACTION);
-  }
+  element = Feld[jx][jy];
 
-  if (IS_MOVING(x,y))
-    return(MF_NO_ACTION);
+  if ((player->dynamite == 0 && player->dynabombs_left == 0) ||
+      IS_ACTIVE_BOMB(element) || element == EL_EXPLOSION)
+    return FALSE;
 
-  element = Feld[x][y];
+#if 0
+  if (element != EL_EMPTY)
+    return FALSE;
+#endif
 
-  switch(element)
+  if (element != EL_EMPTY)
   {
-    case EL_LEERRAUM:
-      break;
-
-    case EL_ERDREICH:
-      Feld[x][y] = EL_LEERRAUM;
-      break;
-
-    case EL_EDELSTEIN:
-    case EL_EDELSTEIN_BD:
-    case EL_EDELSTEIN_GELB:
-    case EL_EDELSTEIN_ROT:
-    case EL_EDELSTEIN_LILA:
-      Feld[x][y] = EL_LEERRAUM;
-      MovDelay[x][y] = 0;	/* wegen EDELSTEIN_BD-Funkeln! */
-      if (Gems>0)
-	Gems--;
-      RaiseScoreElement(EL_EDELSTEIN);
-      DrawText(DX_EMERALDS,DY_EMERALDS,int2str(Gems,3),FS_SMALL,FC_YELLOW);
-      PlaySoundLevel(x,y,SND_PONG);
-      break;
-
-    case EL_DIAMANT:
-      Feld[x][y] = EL_LEERRAUM;
-      Gems -= 3;
-      if (Gems<0)
-	Gems=0;
-      RaiseScoreElement(EL_DIAMANT);
-      DrawText(DX_EMERALDS,DY_EMERALDS,int2str(Gems,3),FS_SMALL,FC_YELLOW);
-      PlaySoundLevel(x,y,SND_PONG);
-      break;
-
-    case EL_DYNAMIT_AUS:
-      Feld[x][y] = EL_LEERRAUM;
-      Dynamite++;
-      RaiseScoreElement(EL_DYNAMIT);
-      DrawText(DX_DYNAMITE,DY_DYNAMITE,int2str(Dynamite,3),FS_SMALL,FC_YELLOW);
-      PlaySoundLevel(x,y,SND_PONG);
-      break;
+#if 0
+    Store[jx][jy] = element;
+#else
+    Back[jx][jy] = element;
+#endif
+  }
 
-    case EL_DYNABOMB_NR:
-      Feld[x][y] = EL_LEERRAUM;
-      DynaBombCount++;
-      DynaBombsLeft++;
-      RaiseScoreElement(EL_DYNAMIT);
-      PlaySoundLevel(x,y,SND_PONG);
-      break;
-    case EL_DYNABOMB_SZ:
+  MovDelay[jx][jy] = 96;
 
-      Feld[x][y] = EL_LEERRAUM;
-      DynaBombSize++;
-      RaiseScoreElement(EL_DYNAMIT);
-      PlaySoundLevel(x,y,SND_PONG);
-      break;
+  ResetGfxAnimation(jx, jy);
+  ResetRandomAnimationValue(jx, jy);
 
-    case EL_DYNABOMB_XL:
-      Feld[x][y] = EL_LEERRAUM;
-      DynaBombXL = TRUE;
-      RaiseScoreElement(EL_DYNAMIT);
-      PlaySoundLevel(x,y,SND_PONG);
-      break;
+  if (player->dynamite)
+  {
+    Feld[jx][jy] = (player->use_disk_red_graphic ? EL_SP_DISK_RED_ACTIVE :
+		    EL_DYNAMITE_ACTIVE);
+    player->dynamite--;
 
-    case EL_SCHLUESSEL1:
-    case EL_SCHLUESSEL2:
-    case EL_SCHLUESSEL3:
-    case EL_SCHLUESSEL4:
+    DrawText(DX_DYNAMITE, DY_DYNAMITE, int2str(local_player->dynamite, 3),
+	     FONT_TEXT_2);
+    if (IN_SCR_FIELD(SCREENX(jx), SCREENY(jy)))
     {
-      int key_nr = element-EL_SCHLUESSEL1;
-
-      Feld[x][y] = EL_LEERRAUM;
-      Key[key_nr] = TRUE;
-      RaiseScoreElement(EL_SCHLUESSEL);
-      DrawMiniGraphicExt(drawto,gc,
-			 DX_KEYS+key_nr*MINI_TILEX,DY_KEYS,
-			 GFX_SCHLUESSEL1+key_nr);
-      DrawMiniGraphicExt(window,gc,
-			 DX_KEYS+key_nr*MINI_TILEX,DY_KEYS,
-			 GFX_SCHLUESSEL1+key_nr);
-      PlaySoundLevel(x,y,SND_PONG);
-      break;
+#if 1
+      DrawGraphicThruMask(SCREENX(jx), SCREENY(jy), el2img(Feld[jx][jy]), 0);
+#else
+      if (game.emulation == EMU_SUPAPLEX)
+	DrawGraphic(SCREENX(jx), SCREENY(jy), IMG_SP_DISK_RED, 0);
+      else
+	DrawGraphicThruMask(SCREENX(jx), SCREENY(jy), IMG_DYNAMITE_ACTIVE, 0);
+#endif
     }
 
-    case EL_ABLENK_AUS:
-      Feld[x][y] = EL_ABLENK_EIN;
-      ZX = x;
-      ZY = y;
-      DrawLevelField(x,y);
-      return(MF_ACTION);
-      break;
+    PlaySoundLevelAction(jx, jy, ACTION_DROPPING);
+  }
+  else
+  {
+    Feld[jx][jy] =
+      EL_DYNABOMB_PLAYER_1_ACTIVE + (player->element_nr - EL_PLAYER_1);
+    player->dynabombs_left--;
 
-    case EL_FELSBROCKEN:
-    case EL_BOMBE:
-    case EL_KOKOSNUSS:
-    case EL_ZEIT_LEER:
-      if (dy || mode==DF_SNAP)
-	return(MF_NO_ACTION);
+    if (IN_SCR_FIELD(SCREENX(jx), SCREENY(jy)))
+      DrawGraphicThruMask(SCREENX(jx), SCREENY(jy), el2img(Feld[jx][jy]), 0);
 
-      PlayerPushing = TRUE;
+    PlaySoundLevelAction(jx, jy, ACTION_DROPPING);
+  }
 
-      if (!IN_LEV_FIELD(x+dx,y+dy) || Feld[x+dx][y+dy] != EL_LEERRAUM)
-	return(MF_NO_ACTION);
+  return TRUE;
+}
 
-      if (real_dy)
-      {
-	if (IN_LEV_FIELD(JX,JY+real_dy) && !IS_SOLID(Feld[JX][JY+real_dy]))
-	  return(MF_NO_ACTION);
-      }
+/* ------------------------------------------------------------------------- */
+/* game sound playing functions                                              */
+/* ------------------------------------------------------------------------- */
 
-      if (push_delay == 0)
-	push_delay = FrameCounter;
-      if (!FrameReached(&push_delay,push_delay_value) && !tape.playing)
-	return(MF_NO_ACTION);
+static int *loop_sound_frame = NULL;
+static int *loop_sound_volume = NULL;
 
-      Feld[x][y] = EL_LEERRAUM;
-      Feld[x+dx][y+dy] = element;
+void InitPlaySoundLevel()
+{
+  int num_sounds = getSoundListSize();
 
-      push_delay_value = 2+RND(8);
+  if (loop_sound_frame != NULL)
+    free(loop_sound_frame);
 
-      DrawLevelField(x+dx,y+dy);
-      if (element==EL_FELSBROCKEN)
-	PlaySoundLevel(x+dx,y+dy,SND_PUSCH);
-      else if (element==EL_KOKOSNUSS)
-	PlaySoundLevel(x+dx,y+dy,SND_KNURK);
-      else
-	PlaySoundLevel(x+dx,y+dy,SND_KLOPF);
-      break;
+  if (loop_sound_volume != NULL)
+    free(loop_sound_volume);
 
-    case EL_PFORTE1:
-    case EL_PFORTE2:
-    case EL_PFORTE3:
-    case EL_PFORTE4:
-      if (!Key[element-EL_PFORTE1])
-	return(MF_NO_ACTION);
-      break;
+  loop_sound_frame = checked_calloc(num_sounds * sizeof(int));
+  loop_sound_volume = checked_calloc(num_sounds * sizeof(int));
+}
 
-    case EL_PFORTE1X:
-    case EL_PFORTE2X:
-    case EL_PFORTE3X:
-    case EL_PFORTE4X:
-      if (!Key[element-EL_PFORTE1X])
-	return(MF_NO_ACTION);
-      break;
+static void PlaySoundLevel(int x, int y, int nr)
+{
+  int sx = SCREENX(x), sy = SCREENY(y);
+  int volume, stereo_position;
+  int max_distance = 8;
+  int type = (IS_LOOP_SOUND(nr) ? SND_CTRL_PLAY_LOOP : SND_CTRL_PLAY_SOUND);
 
-    case EL_AUSGANG_ZU:
-    case EL_AUSGANG_ACT:
-      /* Tür ist (noch) nicht offen! */
-      return(MF_NO_ACTION);
-      break;
+  if ((!setup.sound_simple && !IS_LOOP_SOUND(nr)) ||
+      (!setup.sound_loops && IS_LOOP_SOUND(nr)))
+    return;
 
-    case EL_AUSGANG_AUF:
-      if (mode==DF_SNAP)
-	return(MF_NO_ACTION);
+  if (!IN_LEV_FIELD(x, y) ||
+      sx < -max_distance || sx >= SCR_FIELDX + max_distance ||
+      sy < -max_distance || sy >= SCR_FIELDY + max_distance)
+    return;
 
-      PlayerGone = TRUE;
-      PlaySoundLevel(x,y,SND_BUING);
+  volume = SOUND_MAX_VOLUME;
 
-      if (!Friends)
-	LevelSolved = GameOver = TRUE;
+  if (!IN_SCR_FIELD(sx, sy))
+  {
+    int dx = ABS(sx - SCR_FIELDX / 2) - SCR_FIELDX / 2;
+    int dy = ABS(sy - SCR_FIELDY / 2) - SCR_FIELDY / 2;
 
-      break;
+    volume -= volume * (dx > dy ? dx : dy) / max_distance;
+  }
 
-    case EL_BIRNE_AUS:
-      Feld[x][y] = EL_BIRNE_EIN;
-      Lights--;
-      DrawLevelField(x,y);
-      PlaySoundLevel(x,y,SND_DENG);
-      return(MF_ACTION);
-      break;
+  stereo_position = (SOUND_MAX_LEFT +
+		     (sx + max_distance) * SOUND_MAX_LEFT2RIGHT /
+		     (SCR_FIELDX + 2 * max_distance));
 
-    case EL_ZEIT_VOLL:
-      Feld[x][y] = EL_ZEIT_LEER;
-      TimeLeft += 10;
-      DrawText(DX_TIME,DY_TIME,int2str(TimeLeft,3),FS_SMALL,FC_YELLOW);
-      DrawLevelField(x,y);
-      PlaySoundStereo(SND_GONG,PSND_MAX_RIGHT);
-      return(MF_ACTION);
-      break;
+  if (IS_LOOP_SOUND(nr))
+  {
+    /* This assures that quieter loop sounds do not overwrite louder ones,
+       while restarting sound volume comparison with each new game frame. */
 
-    case EL_SOKOBAN_FELD_LEER:
-      break;
+    if (loop_sound_volume[nr] > volume && loop_sound_frame[nr] == FrameCounter)
+      return;
 
-    case EL_SOKOBAN_FELD_VOLL:
-    case EL_SOKOBAN_OBJEKT:
-    case EL_SONDE:
-      if (mode==DF_SNAP)
-	return(MF_NO_ACTION);
+    loop_sound_volume[nr] = volume;
+    loop_sound_frame[nr] = FrameCounter;
+  }
 
-      PlayerPushing = TRUE;
+  PlaySoundExt(nr, volume, stereo_position, type);
+}
 
-      if (!IN_LEV_FIELD(x+dx,y+dy)
-	  || (Feld[x+dx][y+dy] != EL_LEERRAUM
-	      && (Feld[x+dx][y+dy] != EL_SOKOBAN_FELD_LEER
-		  || !IS_SB_ELEMENT(element))))
-	return(MF_NO_ACTION);
+static void PlaySoundLevelNearest(int x, int y, int sound_action)
+{
+  PlaySoundLevel(x < LEVELX(BX1) ? LEVELX(BX1) :
+		 x > LEVELX(BX2) ? LEVELX(BX2) : x,
+		 y < LEVELY(BY1) ? LEVELY(BY1) :
+		 y > LEVELY(BY2) ? LEVELY(BY2) : y,
+		 sound_action);
+}
 
-      if (dx && real_dy)
-      {
-	if (IN_LEV_FIELD(JX,JY+real_dy) && !IS_SOLID(Feld[JX][JY+real_dy]))
-	  return(MF_NO_ACTION);
-      }
-      else if (dy && real_dx)
-      {
-	if (IN_LEV_FIELD(JX+real_dx,JY) && !IS_SOLID(Feld[JX+real_dx][JY]))
-	  return(MF_NO_ACTION);
-      }
+static void PlaySoundLevelAction(int x, int y, int action)
+{
+  PlaySoundLevelElementAction(x, y, Feld[x][y], action);
+}
 
-      if (push_delay == 0)
-	push_delay = FrameCounter;
-      if (!FrameReached(&push_delay,push_delay_value) && !tape.playing)
-	return(MF_NO_ACTION);
+static void PlaySoundLevelElementAction(int x, int y, int element, int action)
+{
+  int sound_effect = element_info[element].sound[action];
 
-      if (IS_SB_ELEMENT(element))
-      {
-	if (element == EL_SOKOBAN_FELD_VOLL)
-	{
-	  Feld[x][y] = EL_SOKOBAN_FELD_LEER;
-	  SokobanFields++;
-	}
-	else
-	  Feld[x][y] = EL_LEERRAUM;
+  if (sound_effect != SND_UNDEFINED)
+    PlaySoundLevel(x, y, sound_effect);
+}
 
-	if (Feld[x+dx][y+dy] == EL_SOKOBAN_FELD_LEER)
-	{
-	  Feld[x+dx][y+dy] = EL_SOKOBAN_FELD_VOLL;
-	  SokobanFields--;
-	  if (element == EL_SOKOBAN_OBJEKT)
-	    PlaySoundLevel(x,y,SND_DENG);
-	}
-	else
-	  Feld[x+dx][y+dy] = EL_SOKOBAN_OBJEKT;
-      }
-      else
-      {
-	Feld[x][y] = EL_LEERRAUM;
-	Feld[x+dx][y+dy] = element;
-      }
+static void PlaySoundLevelActionIfLoop(int x, int y, int action)
+{
+  int sound_effect = element_info[Feld[x][y]].sound[action];
 
-      push_delay_value = 2;
+  if (sound_effect != SND_UNDEFINED && IS_LOOP_SOUND(sound_effect))
+    PlaySoundLevel(x, y, sound_effect);
+}
 
-      DrawLevelField(x,y);
-      DrawLevelField(x+dx,y+dy);
-      PlaySoundLevel(x+dx,y+dy,SND_PUSCH);
+static void StopSoundLevelActionIfLoop(int x, int y, int action)
+{
+  int sound_effect = element_info[Feld[x][y]].sound[action];
 
-      if (IS_SB_ELEMENT(element) &&
-	  SokobanFields == 0 && game_emulation == EMU_SOKOBAN)
-      {
-	LevelSolved = GameOver = TRUE;
-	PlaySoundLevel(x,y,SND_BUING);
-      }
+  if (sound_effect != SND_UNDEFINED && IS_LOOP_SOUND(sound_effect))
+    StopSoundExt(sound_effect, SND_CTRL_STOP_SOUND);
+}
 
-      break;
+void RaiseScore(int value)
+{
+  local_player->score += value;
+  DrawText(DX_SCORE, DY_SCORE, int2str(local_player->score, 5), FONT_TEXT_2);
+}
 
-    case EL_MAULWURF:
-    case EL_PINGUIN:
-    case EL_SCHWEIN:
-    case EL_DRACHE:
+void RaiseScoreElement(int element)
+{
+  switch(element)
+  {
+    case EL_EMERALD:
+    case EL_BD_DIAMOND:
+    case EL_EMERALD_YELLOW:
+    case EL_EMERALD_RED:
+    case EL_EMERALD_PURPLE:
+    case EL_SP_INFOTRON:
+      RaiseScore(level.score[SC_EMERALD]);
+      break;
+    case EL_DIAMOND:
+      RaiseScore(level.score[SC_DIAMOND]);
+      break;
+    case EL_CRYSTAL:
+      RaiseScore(level.score[SC_CRYSTAL]);
+      break;
+    case EL_PEARL:
+      RaiseScore(level.score[SC_PEARL]);
+      break;
+    case EL_BUG:
+    case EL_BD_BUTTERFLY:
+    case EL_SP_ELECTRON:
+      RaiseScore(level.score[SC_BUG]);
+      break;
+    case EL_SPACESHIP:
+    case EL_BD_FIREFLY:
+    case EL_SP_SNIKSNAK:
+      RaiseScore(level.score[SC_SPACESHIP]);
+      break;
+    case EL_YAMYAM:
+    case EL_DARK_YAMYAM:
+      RaiseScore(level.score[SC_YAMYAM]);
+      break;
+    case EL_ROBOT:
+      RaiseScore(level.score[SC_ROBOT]);
+      break;
+    case EL_PACMAN:
+      RaiseScore(level.score[SC_PACMAN]);
+      break;
+    case EL_NUT:
+      RaiseScore(level.score[SC_NUT]);
+      break;
+    case EL_DYNAMITE:
+    case EL_SP_DISK_RED:
+    case EL_DYNABOMB_INCREASE_NUMBER:
+    case EL_DYNABOMB_INCREASE_SIZE:
+    case EL_DYNABOMB_INCREASE_POWER:
+      RaiseScore(level.score[SC_DYNAMITE]);
+      break;
+    case EL_SHIELD_NORMAL:
+    case EL_SHIELD_DEADLY:
+      RaiseScore(level.score[SC_SHIELD]);
+      break;
+    case EL_EXTRA_TIME:
+      RaiseScore(level.score[SC_TIME_BONUS]);
+      break;
+    case EL_KEY_1:
+    case EL_KEY_2:
+    case EL_KEY_3:
+    case EL_KEY_4:
+      RaiseScore(level.score[SC_KEY]);
       break;
-
     default:
-      return(MF_NO_ACTION);
+      RaiseScore(element_info[element].score);
       break;
   }
-
-  push_delay = 0;
-
-  return(MF_MOVING);
 }
 
-BOOL SnapField(int dx, int dy)
+void RequestQuitGame(boolean ask_if_really_quit)
 {
-  int x = JX+dx, y = JY+dy;
-  static int snapped = FALSE;
-
-  if (PlayerGone || !IN_LEV_FIELD(x,y))
-    return(FALSE);
-  if (dx && dy)
-    return(FALSE);
-  if (!dx && !dy)
+  if (AllPlayersGone ||
+      !ask_if_really_quit ||
+      level_editor_test_game ||
+      Request("Do you really want to quit the game ?",
+	      REQ_ASK | REQ_STAY_CLOSED))
   {
-    snapped = FALSE;
-    return(FALSE);
+#if defined(PLATFORM_UNIX)
+    if (options.network)
+      SendToServer_StopPlaying();
+    else
+#endif
+    {
+      game_status = GAME_MODE_MAIN;
+      DrawMainMenu();
+    }
+  }
+  else
+  {
+    OpenDoor(DOOR_OPEN_1 | DOOR_COPY_BACK);
   }
-  if (snapped)
-    return(FALSE);
-
-  PlayerMovDir = (dx < 0 ? MV_LEFT :
-		  dx > 0 ? MV_RIGHT :
-		  dy < 0 ? MV_UP :
-		  dy > 0 ? MV_DOWN :	MV_NO_MOVING);
-
-  if (!DigField(x,y, 0,0, DF_SNAP))
-    return(FALSE);
-
-  snapped = TRUE;
-  DrawLevelField(x,y);
-  BackToFront();
-
-  return(TRUE);
 }
 
-BOOL PlaceBomb(void)
-{
-  int element;
 
-  if (PlayerGone || PlayerMovPos)
-    return(FALSE);
+/* ---------- new game button stuff ---------------------------------------- */
 
-  element = Feld[JX][JY];
+/* graphic position values for game buttons */
+#define GAME_BUTTON_XSIZE	30
+#define GAME_BUTTON_YSIZE	30
+#define GAME_BUTTON_XPOS	5
+#define GAME_BUTTON_YPOS	215
+#define SOUND_BUTTON_XPOS	5
+#define SOUND_BUTTON_YPOS	(GAME_BUTTON_YPOS + GAME_BUTTON_YSIZE)
 
-  if ((Dynamite==0 && DynaBombsLeft==0) ||
-      element==EL_DYNAMIT || element==EL_DYNABOMB || element==EL_EXPLODING)
-    return(FALSE);
+#define GAME_BUTTON_STOP_XPOS	(GAME_BUTTON_XPOS + 0 * GAME_BUTTON_XSIZE)
+#define GAME_BUTTON_PAUSE_XPOS	(GAME_BUTTON_XPOS + 1 * GAME_BUTTON_XSIZE)
+#define GAME_BUTTON_PLAY_XPOS	(GAME_BUTTON_XPOS + 2 * GAME_BUTTON_XSIZE)
+#define SOUND_BUTTON_MUSIC_XPOS	(SOUND_BUTTON_XPOS + 0 * GAME_BUTTON_XSIZE)
+#define SOUND_BUTTON_LOOPS_XPOS	(SOUND_BUTTON_XPOS + 1 * GAME_BUTTON_XSIZE)
+#define SOUND_BUTTON_SIMPLE_XPOS (SOUND_BUTTON_XPOS + 2 * GAME_BUTTON_XSIZE)
 
-  if (element != EL_LEERRAUM)
-    Store[JX][JY] = element;
-
-  if (Dynamite)
+static struct
+{
+  int x, y;
+  int gadget_id;
+  char *infotext;
+} gamebutton_info[NUM_GAME_BUTTONS] =
+{
   {
-    Feld[JX][JY] = EL_DYNAMIT;
-    MovDelay[JX][JY] = 96;
-    Dynamite--;
-    DrawText(DX_DYNAMITE,DY_DYNAMITE,int2str(Dynamite,3),FS_SMALL,FC_YELLOW);
-    DrawGraphicThruMask(SCROLLX(JX),SCROLLY(JY),GFX_DYNAMIT);
-  }
-  else
+    GAME_BUTTON_STOP_XPOS,	GAME_BUTTON_YPOS,
+    GAME_CTRL_ID_STOP,
+    "stop game"
+  },
+  {
+    GAME_BUTTON_PAUSE_XPOS,	GAME_BUTTON_YPOS,
+    GAME_CTRL_ID_PAUSE,
+    "pause game"
+  },
   {
-    Feld[JX][JY] = EL_DYNABOMB;
-    MovDelay[JX][JY] = 96;
-    DynaBombsLeft--;
-    DrawGraphicThruMask(SCROLLX(JX),SCROLLY(JY),GFX_DYNABOMB);
+    GAME_BUTTON_PLAY_XPOS,	GAME_BUTTON_YPOS,
+    GAME_CTRL_ID_PLAY,
+    "play game"
+  },
+  {
+    SOUND_BUTTON_MUSIC_XPOS,	SOUND_BUTTON_YPOS,
+    SOUND_CTRL_ID_MUSIC,
+    "background music on/off"
+  },
+  {
+    SOUND_BUTTON_LOOPS_XPOS,	SOUND_BUTTON_YPOS,
+    SOUND_CTRL_ID_LOOPS,
+    "sound loops on/off"
+  },
+  {
+    SOUND_BUTTON_SIMPLE_XPOS,	SOUND_BUTTON_YPOS,
+    SOUND_CTRL_ID_SIMPLE,
+    "normal sounds on/off"
   }
+};
 
-  return(TRUE);
-}
-
-void PlaySoundLevel(int x, int y, int sound_nr)
+void CreateGameButtons()
 {
-  int sx = SCROLLX(x), sy = SCROLLY(y);
-  int volume, stereo;
-  int silence_distance = 8;
+  int i;
 
-  if ((!sound_simple_on && !IS_LOOP_SOUND(sound_nr)) ||
-      (!sound_loops_on && IS_LOOP_SOUND(sound_nr)))
-    return;
+  for (i=0; i<NUM_GAME_BUTTONS; i++)
+  {
+    Bitmap *gd_bitmap = graphic_info[IMG_GLOBAL_DOOR].bitmap;
+    struct GadgetInfo *gi;
+    int button_type;
+    boolean checked;
+    unsigned long event_mask;
+    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;
+    gd_x1 = DOOR_GFX_PAGEX4 + gd_xoffset;
+    gd_x2 = DOOR_GFX_PAGEX3 + gd_xoffset;
+
+    if (id == GAME_CTRL_ID_STOP ||
+	id == GAME_CTRL_ID_PAUSE ||
+	id == GAME_CTRL_ID_PLAY)
+    {
+      button_type = GD_TYPE_NORMAL_BUTTON;
+      checked = FALSE;
+      event_mask = GD_EVENT_RELEASED;
+      gd_y1  = DOOR_GFX_PAGEY1 + gd_yoffset - GAME_BUTTON_YSIZE;
+      gd_y2  = DOOR_GFX_PAGEY1 + gd_yoffset - GAME_BUTTON_YSIZE;
+    }
+    else
+    {
+      button_type = GD_TYPE_CHECK_BUTTON;
+      checked =
+	((id == SOUND_CTRL_ID_MUSIC && setup.sound_music) ||
+	 (id == SOUND_CTRL_ID_LOOPS && setup.sound_loops) ||
+	 (id == SOUND_CTRL_ID_SIMPLE && setup.sound_simple) ? TRUE : FALSE);
+      event_mask = GD_EVENT_PRESSED;
+      gd_y1  = DOOR_GFX_PAGEY1 + gd_yoffset;
+      gd_y2  = DOOR_GFX_PAGEY1 + gd_yoffset - GAME_BUTTON_YSIZE;
+    }
 
-  if (!IN_LEV_FIELD(x,y) ||
-      sx < -silence_distance || sx >= SCR_FIELDX+silence_distance ||
-      sy < -silence_distance || sy >= SCR_FIELDY+silence_distance)
-    return;
+    gi = CreateGadget(GDI_CUSTOM_ID, id,
+		      GDI_INFO_TEXT, gamebutton_info[i].infotext,
+		      GDI_X, DX + gd_xoffset,
+		      GDI_Y, DY + gd_yoffset,
+		      GDI_WIDTH, GAME_BUTTON_XSIZE,
+		      GDI_HEIGHT, GAME_BUTTON_YSIZE,
+		      GDI_TYPE, button_type,
+		      GDI_STATE, GD_BUTTON_UNPRESSED,
+		      GDI_CHECKED, checked,
+		      GDI_DESIGN_UNPRESSED, gd_bitmap, gd_x1, gd_y1,
+		      GDI_DESIGN_PRESSED, gd_bitmap, gd_x2, gd_y1,
+		      GDI_ALT_DESIGN_UNPRESSED, gd_bitmap, gd_x1, gd_y2,
+		      GDI_ALT_DESIGN_PRESSED, gd_bitmap, gd_x2, gd_y2,
+		      GDI_EVENT_MASK, event_mask,
+		      GDI_CALLBACK_ACTION, HandleGameButtons,
+		      GDI_END);
+
+    if (gi == NULL)
+      Error(ERR_EXIT, "cannot create gadget");
+
+    game_gadget[id] = gi;
+  }
+}
 
-  volume = PSND_MAX_VOLUME;
-#ifndef MSDOS
-  stereo = (sx-SCR_FIELDX/2)*12;
-#else
-  stereo = PSND_MIDDLE+(2*sx-(SCR_FIELDX-1))*5;
-  if(stereo > PSND_MAX_RIGHT) stereo = PSND_MAX_RIGHT;
-  if(stereo < PSND_MAX_LEFT) stereo = PSND_MAX_LEFT;
-#endif
+void FreeGameButtons()
+{
+  int i;
 
-  if (!IN_SCR_FIELD(sx,sy))
-  {
-    int dx = ABS(sx-SCR_FIELDX/2)-SCR_FIELDX/2;
-    int dy = ABS(sy-SCR_FIELDY/2)-SCR_FIELDY/2;
+  for (i=0; i<NUM_GAME_BUTTONS; i++)
+    FreeGadget(game_gadget[i]);
+}
 
-    volume -= volume*(dx > dy ? dx : dy)/silence_distance;
-  }
+static void MapGameButtons()
+{
+  int i;
 
-  PlaySoundExt(sound_nr, volume, stereo, PSND_NO_LOOP);
+  for (i=0; i<NUM_GAME_BUTTONS; i++)
+    MapGadget(game_gadget[i]);
 }
 
-void RaiseScore(int value)
+void UnmapGameButtons()
 {
-  Score += value;
-  DrawText(DX_SCORE,DY_SCORE,int2str(Score,5),FS_SMALL,FC_YELLOW);
+  int i;
+
+  for (i=0; i<NUM_GAME_BUTTONS; i++)
+    UnmapGadget(game_gadget[i]);
 }
 
-void RaiseScoreElement(int element)
+static void HandleGameButtons(struct GadgetInfo *gi)
 {
-  switch(element)
+  int id = gi->custom_id;
+
+  if (game_status != GAME_MODE_PLAYING)
+    return;
+
+  switch (id)
   {
-    case EL_EDELSTEIN:
-      RaiseScore(level.score[SC_EDELSTEIN]);
-      break;
-    case EL_DIAMANT:
-      RaiseScore(level.score[SC_DIAMANT]);
-      break;
-    case EL_KAEFER:
-    case EL_BUTTERFLY:
-      RaiseScore(level.score[SC_KAEFER]);
-      break;
-    case EL_FLIEGER:
-    case EL_FIREFLY:
-      RaiseScore(level.score[SC_FLIEGER]);
+    case GAME_CTRL_ID_STOP:
+      RequestQuitGame(TRUE);
       break;
-    case EL_MAMPFER:
-    case EL_MAMPFER2:
-      RaiseScore(level.score[SC_MAMPFER]);
-      break;
-    case EL_ROBOT:
-      RaiseScore(level.score[SC_ROBOT]);
+
+    case GAME_CTRL_ID_PAUSE:
+      if (options.network)
+      {
+#if defined(PLATFORM_UNIX)
+	if (tape.pausing)
+	  SendToServer_ContinuePlaying();
+	else
+	  SendToServer_PausePlaying();
+#endif
+      }
+      else
+	TapeTogglePause(TAPE_TOGGLE_MANUAL);
       break;
-    case EL_PACMAN:
-      RaiseScore(level.score[SC_PACMAN]);
+
+    case GAME_CTRL_ID_PLAY:
+      if (tape.pausing)
+      {
+#if defined(PLATFORM_UNIX)
+	if (options.network)
+	  SendToServer_ContinuePlaying();
+	else
+#endif
+	{
+	  tape.pausing = FALSE;
+	  DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
+	}
+      }
       break;
-    case EL_KOKOSNUSS:
-      RaiseScore(level.score[SC_KOKOSNUSS]);
+
+    case SOUND_CTRL_ID_MUSIC:
+      if (setup.sound_music)
+      { 
+	setup.sound_music = FALSE;
+	FadeMusic();
+      }
+      else if (audio.music_available)
+      { 
+	setup.sound = setup.sound_music = TRUE;
+	PlayMusic(level_nr);
+      }
       break;
-    case EL_DYNAMIT:
-      RaiseScore(level.score[SC_DYNAMIT]);
+
+    case SOUND_CTRL_ID_LOOPS:
+      if (setup.sound_loops)
+	setup.sound_loops = FALSE;
+      else if (audio.loops_available)
+	setup.sound = setup.sound_loops = TRUE;
       break;
-    case EL_SCHLUESSEL:
-      RaiseScore(level.score[SC_SCHLUESSEL]);
+
+    case SOUND_CTRL_ID_SIMPLE:
+      if (setup.sound_simple)
+	setup.sound_simple = FALSE;
+      else if (audio.sound_available)
+	setup.sound = setup.sound_simple = TRUE;
       break;
+
     default:
       break;
   }