X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Fgame.c;h=14e6445da7ccb717999e5b7574d8d85b443f1418;hp=b785616403af98b17add1109e1b1cf49ac448726;hb=8d46c5298f0fcce7bdb52f3835b2fbbdc403dfe0;hpb=7b31a77eec53ed2b96d5924a743b0706c9e4b11c

diff --git a/src/game.c b/src/game.c
index b7856164..14e6445d 100644
--- a/src/game.c
+++ b/src/game.c
@@ -1,13 +1,12 @@
 /***********************************************************
 *  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) 1995-98 Artsoft Entertainment                       *
+*              Holger Schemel                              *
+*              Oststrasse 11a                              *
+*              33604 Bielefeld                             *
+*              phone: ++49 +521 290471                     *
+*              email: aeglos@valinor.owl.de                *
 *----------------------------------------------------------*
 *  game.c                                                  *
 ***********************************************************/
@@ -22,73 +21,454 @@
 #include "files.h"
 #include "tape.h"
 #include "joystick.h"
+#include "network.h"
+
+/* this switch controls how rocks move horizontally */
+#define OLD_GAME_BEHAVIOUR	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_NORMAL		0
+#define EX_CENTER		1
+#define EX_BORDER		2
+
+/* 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)
+
+#define IS_LOOP_SOUND(s)	((s)==SND_KLAPPER || (s)==SND_ROEHR ||	\
+				 (s)==SND_NJAM || (s)==SND_MIEP)
+#define IS_MUSIC_SOUND(s)	((s)==SND_ALCHEMY || (s)==SND_CHASE || \
+				 (s)==SND_NETWORK || (s)==SND_CZARDASZ || \
+				 (s)==SND_TYGER || (s)==SND_VOYAGER || \
+				 (s)==SND_TWILIGHT)
+
+/* 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))
+
+/* 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
+
+/* forward declaration for internal use */
+static void CloseAllOpenTimegates(void);
+static void CheckGravityMovement(struct PlayerInfo *);
+static void KillHeroUnlessProtected(int, int);
+
+static void MapGameButtons();
+static void HandleGameButtons(struct GadgetInfo *);
+
+static struct GadgetInfo *game_gadget[NUM_GAME_BUTTONS];
+
+
+
+#ifdef DEBUG
+#if 0
+static unsigned int getStateCheckSum(int counter)
+{
+  int x, y;
+  unsigned int mult = 1;
+  unsigned int checksum = 0;
+  /*
+  static short lastFeld[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
+  */
+  static boolean first_game = TRUE;
+
+  for (y=0; y<lev_fieldy; y++) for(x=0; x<lev_fieldx; x++)
+  {
+    /*
+    if (counter == 3)
+    {
+      if (first_game)
+	lastFeld[x][y] = Feld[x][y];
+      else if (lastFeld[x][y] != Feld[x][y])
+	printf("DIFF: [%d][%d]: lastFeld == %d != %d == Feld\n",
+	       x, y, lastFeld[x][y], Feld[x][y]);
+    }
+    */
+
+    checksum += mult++ * Ur[x][y];
+    checksum += mult++ * Feld[x][y];
+
+    /*
+    checksum += mult++ * MovPos[x][y];
+    checksum += mult++ * MovDir[x][y];
+    checksum += mult++ * MovDelay[x][y];
+    checksum += mult++ * Store[x][y];
+    checksum += mult++ * Store2[x][y];
+    checksum += mult++ * StorePlayer[x][y];
+    checksum += mult++ * Frame[x][y];
+    checksum += mult++ * AmoebaNr[x][y];
+    checksum += mult++ * JustStopped[x][y];
+    checksum += mult++ * Stop[x][y];
+    */
+  }
+
+  if (counter == 3 && first_game)
+    first_game = FALSE;
+
+  return checksum;
+}
+#endif
+#endif
+
+
+
 
 void GetPlayerConfig()
 {
-  int old_joystick_nr = joystick_nr;
+  if (sound_status == SOUND_OFF)
+    setup.sound = FALSE;
 
-  if (sound_status==SOUND_OFF)
-    local_player->setup &= ~SETUP_SOUND;
   if (!sound_loops_allowed)
   {
-    local_player->setup &= ~SETUP_SOUND_LOOPS;
-    local_player->setup &= ~SETUP_SOUND_MUSIC;
+    setup.sound_loops = FALSE;
+    setup.sound_music = FALSE;
   }
 
-  sound_on = sound_simple_on = SETUP_SOUND_ON(local_player->setup);
-  sound_loops_on = SETUP_SOUND_LOOPS_ON(local_player->setup);
-  sound_music_on = SETUP_SOUND_MUSIC_ON(local_player->setup);
-  toons_on = SETUP_TOONS_ON(local_player->setup);
-  direct_draw_on = SETUP_DIRECT_DRAW_ON(local_player->setup);
-  fading_on = SETUP_FADING_ON(local_player->setup);
-  autorecord_on = SETUP_AUTO_RECORD_ON(local_player->setup);
-  joystick_nr = SETUP_2ND_JOYSTICK_ON(local_player->setup);
-  quick_doors = SETUP_QUICK_DOORS_ON(local_player->setup);
-  scroll_delay_on = SETUP_SCROLL_DELAY_ON(local_player->setup);
-  soft_scrolling_on = SETUP_SOFT_SCROLL_ON(local_player->setup);
+  setup.sound_simple = setup.sound;
 
-#ifndef MSDOS
-  if (joystick_nr != old_joystick_nr)
+  InitJoysticks();
+}
+
+static int getBeltNrFromElement(int element)
+{
+  return (element < EL_BELT2_LEFT ? 0 :
+	  element < EL_BELT3_LEFT ? 1 :
+	  element < EL_BELT4_LEFT ? 2 : 3);
+}
+
+static int getBeltNrFromSwitchElement(int element)
+{
+  return (element < EL_BELT2_SWITCH_LEFT ? 0 :
+	  element < EL_BELT3_SWITCH_LEFT ? 1 :
+	  element < EL_BELT4_SWITCH_LEFT ? 2 : 3);
+}
+
+static int getBeltDirNrFromSwitchElement(int element)
+{
+  static int belt_base_element[4] =
   {
-    if (joystick_device)
-      close(joystick_device);
-    InitJoystick();
+    EL_BELT1_SWITCH_LEFT,
+    EL_BELT2_SWITCH_LEFT,
+    EL_BELT3_SWITCH_LEFT,
+    EL_BELT4_SWITCH_LEFT
+  };
+
+  int belt_nr = getBeltNrFromSwitchElement(element);
+  int belt_dir_nr = element - belt_base_element[belt_nr];
+
+  return (belt_dir_nr % 3);
+}
+
+static int getBeltDirFromSwitchElement(int element)
+{
+  static int belt_move_dir[3] =
+  {
+    MV_LEFT,
+    MV_NO_MOVING,
+    MV_RIGHT
+  };
+
+  int belt_dir_nr = getBeltDirNrFromSwitchElement(element);
+
+  return belt_move_dir[belt_dir_nr];
+}
+
+static void InitField(int x, int y, boolean init_game)
+{
+  switch (Feld[x][y])
+  {
+    case EL_SP_MURPHY:
+      if (init_game)
+      {
+	if (stored_player[0].present)
+	{
+	  Feld[x][y] = EL_SP_MURPHY_CLONE;
+	  break;
+	}
+      }
+      /* no break! */
+    case EL_SPIELFIGUR:
+      if (init_game)
+	Feld[x][y] = EL_SPIELER1;
+      /* no break! */
+    case EL_SPIELER1:
+    case EL_SPIELER2:
+    case EL_SPIELER3:
+    case EL_SPIELER4:
+      if (init_game)
+      {
+	struct PlayerInfo *player = &stored_player[Feld[x][y] - EL_SPIELER1];
+	int jx = player->jx, jy = player->jy;
+
+	player->present = TRUE;
+
+	if (!options.network || player->connected)
+	{
+	  player->active = TRUE;
+
+	  /* remove potentially duplicate players */
+	  if (StorePlayer[jx][jy] == Feld[x][y])
+	    StorePlayer[jx][jy] = 0;
+
+	  StorePlayer[x][y] = Feld[x][y];
+
+	  if (options.verbose)
+	  {
+	    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");
+	  }
+	}
+
+	Feld[x][y] = EL_LEERRAUM;
+	player->jx = player->last_jx = x;
+	player->jy = player->last_jy = y;
+      }
+      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_RIGHT:
+    case EL_KAEFER_UP:
+    case EL_KAEFER_LEFT:
+    case EL_KAEFER_DOWN:
+    case EL_KAEFER:
+    case EL_FLIEGER_RIGHT:
+    case EL_FLIEGER_UP:
+    case EL_FLIEGER_LEFT:
+    case EL_FLIEGER_DOWN:
+    case EL_FLIEGER:
+    case EL_BUTTERFLY_RIGHT:
+    case EL_BUTTERFLY_UP:
+    case EL_BUTTERFLY_LEFT:
+    case EL_BUTTERFLY_DOWN:
+    case EL_BUTTERFLY:
+    case EL_FIREFLY_RIGHT:
+    case EL_FIREFLY_UP:
+    case EL_FIREFLY_LEFT:
+    case EL_FIREFLY_DOWN:
+    case EL_FIREFLY:
+    case EL_PACMAN_RIGHT:
+    case EL_PACMAN_UP:
+    case EL_PACMAN_LEFT:
+    case EL_PACMAN_DOWN:
+    case EL_MAMPFER:
+    case EL_MAMPFER2:
+    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;
+
+    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_DYNAMITE_ACTIVE:
+      MovDelay[x][y] = 96;
+      break;
+
+    case EL_BIRNE_AUS:
+      local_player->lights_still_needed++;
+      break;
+
+    case EL_SOKOBAN_FELD_LEER:
+      local_player->sokobanfields_still_needed++;
+      break;
+
+    case EL_PINGUIN:
+      local_player->friends_still_needed++;
+      break;
+
+    case EL_SCHWEIN:
+    case EL_DRACHE:
+      MovDir[x][y] = 1 << RND(4);
+      break;
+
+    case EL_SP_EMPTY:
+      Feld[x][y] = EL_LEERRAUM;
+      break;
+
+    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;
+
+    case EL_BELT1_SWITCH_LEFT:
+    case EL_BELT1_SWITCH_MIDDLE:
+    case EL_BELT1_SWITCH_RIGHT:
+    case EL_BELT2_SWITCH_LEFT:
+    case EL_BELT2_SWITCH_MIDDLE:
+    case EL_BELT2_SWITCH_RIGHT:
+    case EL_BELT3_SWITCH_LEFT:
+    case EL_BELT3_SWITCH_MIDDLE:
+    case EL_BELT3_SWITCH_RIGHT:
+    case EL_BELT4_SWITCH_LEFT:
+    case EL_BELT4_SWITCH_MIDDLE:
+    case EL_BELT4_SWITCH_RIGHT:
+      if (init_game)
+      {
+	int belt_nr = getBeltNrFromSwitchElement(Feld[x][y]);
+	int belt_dir = getBeltDirFromSwitchElement(Feld[x][y]);
+	int belt_dir_nr = getBeltDirNrFromSwitchElement(Feld[x][y]);
+
+	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 */
+	{
+	  Feld[x][y] = Feld[x][y] - belt_dir_nr + game.belt_dir_nr[belt_nr];
+	}
+      }
+      break;
+
+    case EL_SWITCHGATE_SWITCH_2:	/* always start with same switch pos */
+      if (init_game)
+	Feld[x][y] = EL_SWITCHGATE_SWITCH_1;
+      break;
+
+    case EL_LIGHT_SWITCH_ON:
+      if (init_game)
+	game.light_time_left = level.time_light * FRAMES_PER_SECOND;
+      break;
+
+    default:
+      break;
   }
-#endif
 }
 
 void InitGame()
 {
-  int i,j, x,y;
-  BOOL emulate_bd = TRUE;	/* unless non-BOULDERDASH elements found */
-  BOOL emulate_sb = TRUE;	/* unless non-SOKOBAN     elements found */
+  int i, j, x, y;
+  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 */
 
-  for(i=0; i<MAX_PLAYERS; i++)
+  /* don't play tapes over network */
+  network_playing = (options.network && !tape.playing);
+
+  for (i=0; i<MAX_PLAYERS; i++)
   {
     struct PlayerInfo *player = &stored_player[i];
 
-    player->nr = i;
+    player->index_nr = i;
+    player->element_nr = EL_SPIELER1 + i;
+
+    player->present = FALSE;
     player->active = FALSE;
-    player->local = FALSE;
+
+    player->action = 0;
+    player->effective_action = 0;
+    player->programmed_action = 0;
 
     player->score = 0;
-    player->gems_still_needed = level.edelsteine;
+    player->gems_still_needed = level.gems_needed;
     player->sokobanfields_still_needed = 0;
     player->lights_still_needed = 0;
     player->friends_still_needed = 0;
 
-    for(j=0; j<4; j++)
+    for (j=0; j<4; j++)
       player->key[j] = FALSE;
 
     player->dynamite = 0;
     player->dynabomb_count = 0;
-    player->dynabomb_size = 0;
+    player->dynabomb_size = 1;
     player->dynabombs_left = 0;
     player->dynabomb_xl = FALSE;
 
     player->MovDir = MV_NO_MOVING;
     player->MovPos = 0;
     player->Pushing = FALSE;
+    player->Switching = FALSE;
     player->GfxPos = 0;
     player->Frame = 0;
 
@@ -102,168 +482,226 @@ void InitGame()
     player->move_delay = 0;
     player->last_move_dir = MV_NO_MOVING;
 
-    player->snapped = FALSE;
+    player->move_delay_value =
+      (level.double_speed ? MOVE_DELAY_HIGH_SPEED : MOVE_DELAY_NORMAL_SPEED);
 
-    player->gone = FALSE;
+    player->snapped = FALSE;
 
     player->last_jx = player->last_jy = 0;
     player->jx = player->jy = 0;
 
-    DigField(player, 0,0,0,0,DF_NO_PUSH);
-    SnapField(player, 0,0);
-
+    player->shield_passive_time_left = 0;
+    player->shield_active_time_left = 0;
 
-    /* TEST TEST TEST */
-    stored_player[i].active = TRUE;
-    /* TEST TEST TEST */
+    DigField(player, 0, 0, 0, 0, DF_NO_PUSH);
+    SnapField(player, 0, 0);
 
     player->LevelSolved = FALSE;
     player->GameOver = FALSE;
   }
 
-  local_player->active = TRUE;
-  local_player->local = TRUE;
+  network_player_action_received = FALSE;
+
+#ifndef MSDOS
+  /* initial null action */
+  if (network_playing)
+    SendToServer_MovePlayer(MV_NO_MOVING);
+#endif
 
   ZX = ZY = -1;
 
-  MampferNr = 0;
+  game.yam_content_nr = 0;
   FrameCounter = 0;
   TimeFrames = 0;
+  TimePlayed = 0;
   TimeLeft = level.time;
 
   ScreenMovDir = MV_NO_MOVING;
   ScreenMovPos = 0;
   ScreenGfxPos = 0;
 
-  AllPlayersGone = SiebAktiv = FALSE;
+  ScrollStepSize = 0;	/* will be correctly initialized by ScrollScreen() */
+
+  AllPlayersGone = FALSE;
+  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;
+
+  for (i=0; i<4; i++)
+  {
+    game.belt_dir[i] = MV_NO_MOVING;
+    game.belt_dir_nr[i] = 3;		/* not moving, next moving left */
+  }
 
-  for(i=0;i<MAX_NUM_AMOEBA;i++)
+  for (i=0; i<MAX_NUM_AMOEBA; i++)
     AmoebaCnt[i] = AmoebaCnt2[i] = 0;
 
-  for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
+  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] = StorePlayer[x][y] = 0;
-    Frame[x][y] = 0;
-    AmoebaNr[x][y] = 0;
-    JustHit[x][y] = 0;
+    for (y=0; y<lev_fieldy; y++)
+    {
+      Feld[x][y] = Ur[x][y];
+      MovPos[x][y] = MovDir[x][y] = MovDelay[x][y] = 0;
+      Store[x][y] = Store2[x][y] = StorePlayer[x][y] = 0;
+      Frame[x][y] = 0;
+      AmoebaNr[x][y] = 0;
+      JustStopped[x][y] = 0;
+      Stop[x][y] = FALSE;
+    }
+  }
 
-    if (emulate_bd && !IS_BD_ELEMENT(Feld[x][y]))
-      emulate_bd = FALSE;
-    if (emulate_sb && !IS_SB_ELEMENT(Feld[x][y]))
-      emulate_sb = FALSE;
+  for(y=0; y<lev_fieldy; y++)
+  {
+    for(x=0; x<lev_fieldx; x++)
+    {
+      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);
+    }
+  }
 
-    switch(Feld[x][y])
+  /* 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 */
+
+  /* check if any connected player was not found in playfield */
+  for (i=0; i<MAX_PLAYERS; i++)
+  {
+    struct PlayerInfo *player = &stored_player[i];
+
+    if (player->connected && !player->present)
     {
-      case EL_SPIELFIGUR:
-	Feld[x][y] = EL_SPIELER1;
-	/* no break! */
-      case EL_SPIELER1:
-      case EL_SPIELER2:
-      case EL_SPIELER3:
-      case EL_SPIELER4:
+      for (j=0; j<MAX_PLAYERS; j++)
       {
-	struct PlayerInfo *player = &stored_player[Feld[x][y] - EL_SPIELER1];
-	int jx = player->jx, jy = player->jy;
+	struct PlayerInfo *some_player = &stored_player[j];
+	int jx = some_player->jx, jy = some_player->jy;
 
-	/* remove duplicate players */
-	if (StorePlayer[jx][jy] == Feld[x][y])
-	  StorePlayer[jx][jy] = 0;
+	/* 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[x][y] = Feld[x][y];
-	Feld[x][y] = EL_LEERRAUM;
-	player->jx = player->last_jx = x;
-	player->jy = player->last_jy = y;
-	break;
+	  StorePlayer[jx][jy] = player->element_nr;
+	  player->jx = player->last_jx = jx;
+	  player->jy = player->last_jy = jy;
+
+	  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)
+    }
+  }
+
+  if (tape.playing)
+  {
+    /* when playing a tape, eliminate all players who do not participate */
+
+    for (i=0; i<MAX_PLAYERS; i++)
+    {
+      if (stored_player[i].active && !tape.player_participates[i])
+      {
+	struct PlayerInfo *player = &stored_player[i];
+	int jx = player->jx, jy = player->jy;
+
+	player->active = FALSE;
+	StorePlayer[jx][jy] = 0;
+	Feld[jx][jy] = EL_LEERRAUM;
+      }
+    }
+  }
+  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 (stored_player[i].active)
+      {
+	for (j=i+1; j<MAX_PLAYERS; j++)
 	{
-	  Feld[x][y] = EL_AMOEBING;
-	  Store[x][y] = EL_AMOEBE_NASS;
+	  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_LEERRAUM;
+	  }
 	}
-	break;
-      case EL_DYNAMIT:
-	MovDelay[x][y] = 96;
-	break;
-      case EL_BIRNE_AUS:
-	local_player->lights_still_needed++;
-	break;
-      case EL_SOKOBAN_FELD_LEER:
-	local_player->sokobanfields_still_needed++;
-	break;
-      case EL_MAULWURF:
-      case EL_PINGUIN:
-	local_player->friends_still_needed++;
-	break;
-      case EL_SCHWEIN:
-      case EL_DRACHE:
-	MovDir[x][y] = 1<<RND(4);
-	break;
-      default:
-	break;
+      }
     }
   }
 
-  game_emulation = (emulate_bd ? EMU_BOULDERDASH :
-		    emulate_sb ? EMU_SOKOBAN : EMU_NONE);
+  /* when recording the game, store which players take part in the game */
+  if (tape.recording)
+  {
+    for (i=0; i<MAX_PLAYERS; i++)
+      if (stored_player[i].active)
+	tape.player_participates[i] = TRUE;
+  }
+
+  if (options.verbose)
+  {
+    for (i=0; i<MAX_PLAYERS; i++)
+    {
+      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);
+    }
+  }
+
+  game.emulation = (emulate_bd ? EMU_BOULDERDASH :
+		    emulate_sb ? EMU_SOKOBAN :
+		    emulate_sp ? EMU_SUPAPLEX : EMU_NONE);
+
+  if (BorderElement == EL_LEERRAUM)
+  {
+    SBX_Left = 0;
+    SBX_Right = lev_fieldx - SCR_FIELDX;
+    SBY_Upper = 0;
+    SBY_Lower = lev_fieldy - SCR_FIELDY;
+  }
+  else
+  {
+    SBX_Left = -1;
+    SBX_Right = lev_fieldx - SCR_FIELDX + 1;
+    SBY_Upper = -1;
+    SBY_Lower = lev_fieldy - SCR_FIELDY + 1;
+  }
+
+  if (lev_fieldx + (SBX_Left == -1 ? 2 : 0) <= SCR_FIELDX)
+    SBX_Left = SBX_Right = -1 * (SCR_FIELDX - lev_fieldx) / 2;
+
+  if (lev_fieldy + (SBY_Upper == -1 ? 2 : 0) <= SCR_FIELDY)
+    SBY_Upper = SBY_Lower = -1 * (SCR_FIELDY - lev_fieldy) / 2;
 
-  scroll_x = scroll_y = -1;
-  if (local_player->jx >= MIDPOSX-1)
-    scroll_x = (local_player->jx <= lev_fieldx-MIDPOSX ?
+  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 :
-		lev_fieldx - SCR_FIELDX + 1);
-  if (local_player->jy >= MIDPOSY-1)
-    scroll_y = (local_player->jy <= lev_fieldy-MIDPOSY ?
+		SBX_Right);
+  if (local_player->jy >= SBY_Upper + MIDPOSY)
+    scroll_y = (local_player->jy <= SBY_Lower + MIDPOSY ?
 		local_player->jy - MIDPOSY :
-		lev_fieldy - SCR_FIELDY + 1);
+		SBY_Lower);
 
   CloseDoor(DOOR_CLOSE_1);
 
@@ -271,43 +709,67 @@ void InitGame()
   DrawAllPlayers();
   FadeToFront();
 
-  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(local_player->gems_still_needed,3),FS_SMALL,FC_YELLOW);
-  DrawTextExt(pix[PIX_DB_DOOR],gc,
-	      DOOR_GFX_PAGEX1+XX_DYNAMITE,DOOR_GFX_PAGEY1+YY_DYNAMITE,
-	      int2str(local_player->dynamite,3),FS_SMALL,FC_YELLOW);
-  DrawTextExt(pix[PIX_DB_DOOR],gc,
-	      DOOR_GFX_PAGEX1+XX_SCORE,DOOR_GFX_PAGEY1+YY_SCORE,
-	      int2str(local_player->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)
+  /* after drawing the level, corect some elements */
+
+  if (game.timegate_time_left == 0)
+    CloseAllOpenTimegates();
+
+  if (setup.soft_scrolling)
+    XCopyArea(display, fieldbuffer, backbuffer, gc,
+	      FX, FY, SXSIZE, SYSIZE, SX, SY);
+
+  redraw_mask |= REDRAW_FROM_BACKBUFFER;
+
+  /* copy default game door content to main double buffer */
+  XCopyArea(display, pix[PIX_DOOR], drawto, gc,
+	    DOOR_GFX_PAGEX5, DOOR_GFX_PAGEY1, DXSIZE, DYSIZE, DX, DY);
+
+  if (level_nr < 100)
+    DrawText(DX + XX_LEVEL, DY + YY_LEVEL,
+	     int2str(level_nr, 2), FS_SMALL, FC_YELLOW);
+  else
+  {
+    DrawTextExt(drawto, gc, DX + XX_EMERALDS, DY + YY_EMERALDS,
+		int2str(level_nr, 3), FS_SMALL, FC_SPECIAL3);
+    XCopyArea(display, drawto, drawto, gc,
+	      DX + XX_EMERALDS, DY + YY_EMERALDS + 1,
+	      FONT5_XSIZE * 3, FONT5_YSIZE - 1,
+	      DX + XX_LEVEL - 1, DY + YY_LEVEL + 1);
+  }
+
+  DrawText(DX + XX_EMERALDS, DY + YY_EMERALDS,
+	   int2str(local_player->gems_still_needed, 3), FS_SMALL, FC_YELLOW);
+  DrawText(DX + XX_DYNAMITE, DY + YY_DYNAMITE,
+	   int2str(local_player->dynamite, 3), FS_SMALL, FC_YELLOW);
+  DrawText(DX + XX_SCORE, DY + YY_SCORE,
+	   int2str(local_player->score, 5), FS_SMALL, FC_YELLOW);
+  DrawText(DX + XX_TIME, DY + YY_TIME,
+	   int2str(TimeLeft, 3), FS_SMALL, FC_YELLOW);
+
+  UnmapGameButtons();
+  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();
+
+  /* copy actual game door content to door double buffer for OpenDoor() */
+  XCopyArea(display, drawto, pix[PIX_DB_DOOR], gc,
+	    DX, DY, DXSIZE, DYSIZE, DOOR_GFX_PAGEX1, DOOR_GFX_PAGEY1);
+
+  OpenDoor(DOOR_OPEN_ALL);
+
+  if (setup.sound_music)
     PlaySoundLoop(background_loop[level_nr % num_bg_loops]);
 
   XAutoRepeatOff(display);
+
+  if (options.verbose)
+  {
+    for (i=0; i<4; i++)
+      printf("Player %d %sactive.\n",
+	     i + 1, (stored_player[i].active ? "" : "not "));
+  }
 }
 
 void InitMovDir(int x, int y)
@@ -315,77 +777,98 @@ 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 }
+    {  0, +1 },
+    { +1,  0 },
+    {  0, -1 },
+    { -1,  0 }
   };
-  static int direction[2][4] =
+  static int direction[3][4] =
   {
     { MV_RIGHT, MV_UP,   MV_LEFT,  MV_DOWN },
-    { MV_LEFT,  MV_DOWN, MV_RIGHT, MV_UP }
+    { MV_LEFT,  MV_DOWN, MV_RIGHT, MV_UP },
+    { MV_LEFT,  MV_RIGHT, MV_UP, MV_DOWN }
   };
 
   switch(element)
   {
-    case EL_KAEFER_R:
-    case EL_KAEFER_O:
-    case EL_KAEFER_L:
-    case EL_KAEFER_U:
+    case EL_KAEFER_RIGHT:
+    case EL_KAEFER_UP:
+    case EL_KAEFER_LEFT:
+    case EL_KAEFER_DOWN:
       Feld[x][y] = EL_KAEFER;
-      MovDir[x][y] = direction[0][element-EL_KAEFER_R];
+      MovDir[x][y] = direction[0][element - EL_KAEFER_RIGHT];
       break;
-    case EL_FLIEGER_R:
-    case EL_FLIEGER_O:
-    case EL_FLIEGER_L:
-    case EL_FLIEGER_U:
+
+    case EL_FLIEGER_RIGHT:
+    case EL_FLIEGER_UP:
+    case EL_FLIEGER_LEFT:
+    case EL_FLIEGER_DOWN:
       Feld[x][y] = EL_FLIEGER;
-      MovDir[x][y] = direction[0][element-EL_FLIEGER_R];
+      MovDir[x][y] = direction[0][element - EL_FLIEGER_RIGHT];
       break;
-    case EL_BUTTERFLY_R:
-    case EL_BUTTERFLY_O:
-    case EL_BUTTERFLY_L:
-    case EL_BUTTERFLY_U:
+
+    case EL_BUTTERFLY_RIGHT:
+    case EL_BUTTERFLY_UP:
+    case EL_BUTTERFLY_LEFT:
+    case EL_BUTTERFLY_DOWN:
       Feld[x][y] = EL_BUTTERFLY;
-      MovDir[x][y] = direction[0][element-EL_BUTTERFLY_R];
+      MovDir[x][y] = direction[0][element - EL_BUTTERFLY_RIGHT];
       break;
-    case EL_FIREFLY_R:
-    case EL_FIREFLY_O:
-    case EL_FIREFLY_L:
-    case EL_FIREFLY_U:
+
+    case EL_FIREFLY_RIGHT:
+    case EL_FIREFLY_UP:
+    case EL_FIREFLY_LEFT:
+    case EL_FIREFLY_DOWN:
       Feld[x][y] = EL_FIREFLY;
-      MovDir[x][y] = direction[0][element-EL_FIREFLY_R];
+      MovDir[x][y] = direction[0][element - EL_FIREFLY_RIGHT];
       break;
-    case EL_PACMAN_R:
-    case EL_PACMAN_O:
-    case EL_PACMAN_L:
-    case EL_PACMAN_U:
+
+    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_R];
+      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:
-      MovDir[x][y] = 1<<RND(4);
+      MovDir[x][y] = 1 << RND(4);
       if (element != EL_KAEFER &&
 	  element != EL_FLIEGER &&
 	  element != EL_BUTTERFLY &&
 	  element != EL_FIREFLY)
 	break;
 
-      for(i=0;i<4;i++)
+      for (i=0; i<4; i++)
       {
-	int x1,y1;
+	int x1 = x + xy[i][0];
+	int y1 = y + xy[i][1];
 
-	x1 = x+xy[i][0];
-	y1 = y+xy[i][1];
-
-	if (!IN_LEV_FIELD(x1,y1) || !IS_FREE(x1,y1))
+	if (!IN_LEV_FIELD(x1, y1) || !IS_FREE(x1, y1))
 	{
-	  if (element==EL_KAEFER || element==EL_BUTTERFLY)
+	  if (element == EL_KAEFER || element == EL_BUTTERFLY)
 	  {
 	    MovDir[x][y] = direction[0][i];
 	    break;
 	  }
-	  else if (element==EL_FLIEGER || element==EL_FIREFLY)
+	  else if (element == EL_FLIEGER || element == EL_FIREFLY ||
+		   element == EL_SP_SNIKSNAK || element == EL_SP_ELECTRON)
 	  {
 	    MovDir[x][y] = direction[1][i];
 	    break;
@@ -399,13 +882,13 @@ void InitMovDir(int x, int y)
 void InitAmoebaNr(int x, int y)
 {
   int i;
-  int group_nr = AmoebeNachbarNr(x,y);
+  int group_nr = AmoebeNachbarNr(x, y);
 
-  if (group_nr==0)
+  if (group_nr == 0)
   {
-    for(i=1;i<MAX_NUM_AMOEBA;i++)
+    for (i=1; i<MAX_NUM_AMOEBA; i++)
     {
-      if (AmoebaCnt[i]==0)
+      if (AmoebaCnt[i] == 0)
       {
 	group_nr = i;
 	break;
@@ -421,31 +904,57 @@ void InitAmoebaNr(int x, int y)
 void GameWon()
 {
   int hi_pos;
-  int bumplevel = FALSE;
+  boolean raise_level = FALSE;
+
+  if (local_player->MovPos)
+    return;
 
   local_player->LevelSolved = FALSE;
 
   if (TimeLeft)
   {
-    if (sound_loops_on)
+    if (setup.sound_loops)
       PlaySoundExt(SND_SIRR, PSND_MAX_VOLUME, PSND_MAX_RIGHT, PSND_LOOP);
 
     while(TimeLeft > 0)
     {
-      if (!sound_loops_on)
+      if (!setup.sound_loops)
 	PlaySoundStereo(SND_SIRR, PSND_MAX_RIGHT);
-      if (TimeLeft && !(TimeLeft % 10))
+      if (TimeLeft > 0 && !(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);
+      DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FS_SMALL, FC_YELLOW);
       BackToFront();
       Delay(10);
     }
 
-    if (sound_loops_on)
+    if (setup.sound_loops)
+      StopSound(SND_SIRR);
+  }
+  else if (level.time == 0)		/* level without time limit */
+  {
+    if (setup.sound_loops)
+      PlaySoundExt(SND_SIRR, PSND_MAX_VOLUME, PSND_MAX_RIGHT, PSND_LOOP);
+
+    while(TimePlayed < 999)
+    {
+      if (!setup.sound_loops)
+	PlaySoundStereo(SND_SIRR, PSND_MAX_RIGHT);
+      if (TimePlayed < 999 && !(TimePlayed % 10))
+	RaiseScore(level.score[SC_ZEITBONUS]);
+      if (TimePlayed < 900 && !(TimePlayed % 10))
+	TimePlayed += 10;
+      else
+	TimePlayed++;
+      DrawText(DX_TIME, DY_TIME, int2str(TimePlayed, 3), FS_SMALL, FC_YELLOW);
+      BackToFront();
+      Delay(10);
+    }
+
+    if (setup.sound_loops)
       StopSound(SND_SIRR);
   }
 
@@ -463,28 +972,29 @@ void GameWon()
   if (tape.recording)
   {
     TapeStop();
-    SaveLevelTape(tape.level_nr);	/* Ask to save tape */
+    SaveTape(tape.level_nr);		/* Ask to save tape */
   }
 
-  if (level_nr == local_player->handicap &&
-      level_nr < leveldir[leveldir_nr].levels-1)
-  { 
-    local_player->handicap++; 
-    bumplevel = TRUE;
-    SavePlayerInfo(PLAYER_LEVEL);
+  if (level_nr == leveldir_current->handicap_level)
+  {
+    leveldir_current->handicap_level++;
+    SaveLevelSetup_SeriesInfo();
+
+    if (level_nr < leveldir_current->last_level)
+      raise_level = TRUE;
   }
 
-  if ((hi_pos=NewHiScore()) >= 0) 
+  if ((hi_pos = NewHiScore()) >= 0) 
   {
     game_status = HALLOFFAME;
     DrawHallOfFame(hi_pos);
-    if (bumplevel && TAPE_IS_EMPTY(tape))
+    if (raise_level)
       level_nr++;
   }
   else
   {
     game_status = MAINMENU;
-    if (bumplevel && TAPE_IS_EMPTY(tape))
+    if (raise_level)
       level_nr++;
     DrawMainMenu();
   }
@@ -492,68 +1002,70 @@ void GameWon()
   BackToFront();
 }
 
-BOOL NewHiScore()
+int NewHiScore()
 {
-  int k,l;
+  int k, l;
   int position = -1;
 
   LoadScore(level_nr);
 
-  if (!strcmp(local_player->alias_name,EMPTY_ALIAS) ||
-      local_player->score < highscore[MAX_SCORE_ENTRIES-1].Score) 
-    return(-1);
+  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++) 
+  for (k=0; k<MAX_SCORE_ENTRIES; k++) 
   {
     if (local_player->score > highscore[k].Score)
     {
-      /* Spieler kommt in Highscore-Liste */
+      /* player has made it to the hall of fame */
 
-      if (k<MAX_SCORE_ENTRIES-1)
+      if (k < MAX_SCORE_ENTRIES - 1)
       {
-	int m = MAX_SCORE_ENTRIES-1;
+	int m = MAX_SCORE_ENTRIES - 1;
 
 #ifdef ONE_PER_NAME
-	for(l=k;l<MAX_SCORE_ENTRIES;l++)
-	  if (!strcmp(local_player->alias_name,highscore[l].Name))
+	for (l=k; l<MAX_SCORE_ENTRIES; l++)
+	  if (!strcmp(setup.player_name, highscore[l].Name))
 	    m = l;
-	if (m==k)	/* Spieler überschreibt seine alte Position */
+	if (m == k)	/* player's new highscore overwrites his old one */
 	  goto put_into_list;
 #endif
 
-	for(l=m;l>k;l--)
+	for (l=m; l>k; l--)
 	{
-	  strcpy(highscore[l].Name,highscore[l-1].Name);
-	  highscore[l].Score = highscore[l-1].Score;
+	  strcpy(highscore[l].Name, highscore[l - 1].Name);
+	  highscore[l].Score = highscore[l - 1].Score;
 	}
       }
 
 #ifdef ONE_PER_NAME
       put_into_list:
 #endif
-      sprintf(highscore[k].Name,local_player->alias_name);
+      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 (!strcmp(local_player->alias_name,highscore[k].Name))
-      break;	/* Spieler schon mit besserer Punktzahl in der Liste */
+    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) 
+  if (position >= 0) 
     SaveScore(level_nr);
 
-  return(position);
+  return position;
 }
 
 void InitMovingField(int x, int y, int direction)
 {
-  int newx = x + (direction==MV_LEFT ? -1 : direction==MV_RIGHT ? +1 : 0);
-  int newy = y + (direction==MV_UP   ? -1 : direction==MV_DOWN  ? +1 : 0);
+  int newx = x + (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
+  int newy = y + (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
 
   MovDir[x][y] = direction;
   MovDir[newx][newy] = direction;
@@ -564,8 +1076,8 @@ void InitMovingField(int x, int y, int direction)
 void Moving2Blocked(int x, int y, int *goes_to_x, int *goes_to_y)
 {
   int direction = MovDir[x][y];
-  int newx = x + (direction==MV_LEFT ? -1 : direction==MV_RIGHT ? +1 : 0);
-  int newy = y + (direction==MV_UP   ? -1 : direction==MV_DOWN  ? +1 : 0);
+  int newx = x + (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
+  int newy = y + (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
 
   *goes_to_x = newx;
   *goes_to_y = newy;
@@ -576,13 +1088,13 @@ 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)
+  if (direction == MV_LEFT)
     oldx++;
-  else if (direction==MV_RIGHT)
+  else if (direction == MV_RIGHT)
     oldx--;
-  else if (direction==MV_UP)
+  else if (direction == MV_UP)
     oldy++;
-  else if (direction==MV_DOWN)
+  else if (direction == MV_DOWN)
     oldy--;
 
   *comes_from_x = oldx;
@@ -593,15 +1105,38 @@ int MovingOrBlocked2Element(int x, int y)
 {
   int element = Feld[x][y];
 
-  if (element==EL_BLOCKED)
+  if (element == EL_BLOCKED)
   {
-    int oldx,oldy;
+    int oldx, oldy;
 
-    Blocked2Moving(x,y,&oldx,&oldy);
-    return(Feld[oldx][oldy]);
+    Blocked2Moving(x, y, &oldx, &oldy);
+    return Feld[oldx][oldy];
   }
   else
-    return(element);
+    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
+      return EL_BLOCKED;
+  }
+  else
+    return element;
 }
 
 static void RemoveField(int x, int y)
@@ -614,29 +1149,29 @@ static void RemoveField(int x, int y)
 
 void RemoveMovingField(int x, int y)
 {
-  int oldx = x,oldy = y, newx = x,newy = y;
+  int oldx = x, oldy = y, newx = x, newy = y;
 
-  if (Feld[x][y] != EL_BLOCKED && !IS_MOVING(x,y))
+  if (Feld[x][y] != EL_BLOCKED && !IS_MOVING(x, y))
     return;
 
-  if (IS_MOVING(x,y))
+  if (IS_MOVING(x, y))
   {
-    Moving2Blocked(x,y,&newx,&newy);
+    Moving2Blocked(x, y, &newx, &newy);
     if (Feld[newx][newy] != EL_BLOCKED)
       return;
   }
-  else if (Feld[x][y]==EL_BLOCKED)
+  else if (Feld[x][y] == EL_BLOCKED)
   {
-    Blocked2Moving(x,y,&oldx,&oldy);
-    if (!IS_MOVING(oldx,oldy))
+    Blocked2Moving(x, y, &oldx, &oldy);
+    if (!IS_MOVING(oldx, oldy))
       return;
   }
 
-  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))
+  if (Feld[x][y] == EL_BLOCKED &&
+      (Store[oldx][oldy] == EL_MORAST_LEER ||
+       Store[oldx][oldy] == EL_MAGIC_WALL_EMPTY ||
+       Store[oldx][oldy] == EL_MAGIC_WALL_BD_EMPTY ||
+       Store[oldx][oldy] == EL_AMOEBE_NASS))
   {
     Feld[oldx][oldy] = Store[oldx][oldy];
     Store[oldx][oldy] = Store2[oldx][oldy] = 0;
@@ -648,8 +1183,8 @@ void RemoveMovingField(int x, int y)
   MovPos[oldx][oldy] = MovDir[oldx][oldy] = MovDelay[oldx][oldy] = 0;
   MovPos[newx][newy] = MovDir[newx][newy] = MovDelay[newx][newy] = 0;
 
-  DrawLevelField(oldx,oldy);
-  DrawLevelField(newx,newy);
+  DrawLevelField(oldx, oldy);
+  DrawLevelField(newx, newy);
 }
 
 void DrawDynamite(int x, int y)
@@ -658,90 +1193,113 @@ void DrawDynamite(int x, int y)
   int graphic = el2gfx(Feld[x][y]);
   int phase;
 
-  if (!IN_SCR_FIELD(sx,sy) || IS_PLAYER(x,y))
+  if (!IN_SCR_FIELD(sx, sy) || IS_PLAYER(x, y))
     return;
 
   if (Store[x][y])
-    DrawGraphic(sx,sy, el2gfx(Store[x][y]));
+    DrawGraphic(sx, sy, el2gfx(Store[x][y]));
 
-  if (Feld[x][y]==EL_DYNAMIT)
+  if (Feld[x][y] == EL_DYNAMITE_ACTIVE)
   {
-    if ((phase = (96-MovDelay[x][y])/12) > 6)
+    if ((phase = (96 - MovDelay[x][y]) / 12) > 6)
       phase = 6;
   }
   else
   {
-    if ((phase = ((96-MovDelay[x][y])/6) % 8) > 3)
-      phase = 7-phase;
+    if ((phase = ((96 - MovDelay[x][y]) / 6) % 8) > 3)
+      phase = 7 - phase;
   }
 
-  if (Store[x][y])
-    DrawGraphicThruMask(sx,sy, graphic + phase);
+  if (game.emulation == EMU_SUPAPLEX)
+    DrawGraphic(sx, sy, GFX_SP_DISK_RED);
+  else if (Store[x][y])
+    DrawGraphicThruMask(sx, sy, graphic + phase);
   else
-    DrawGraphic(sx,sy, graphic + phase);
+    DrawGraphic(sx, sy, graphic + phase);
 }
 
 void CheckDynamite(int x, int y)
 {
-  if (MovDelay[x][y])		/* neues Dynamit / in Wartezustand */
+  if (MovDelay[x][y])		/* dynamite is still waiting to explode */
   {
     MovDelay[x][y]--;
     if (MovDelay[x][y])
     {
       if (!(MovDelay[x][y] % 12))
-	PlaySoundLevel(x,y,SND_ZISCH);
+	PlaySoundLevel(x, y, SND_ZISCH);
 
-      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);
+      if (IS_ACTIVE_BOMB(Feld[x][y]))
+      {
+	int delay = (Feld[x][y] == EL_DYNAMITE_ACTIVE ? 12 : 6);
+
+	if (!(MovDelay[x][y] % delay))
+	  DrawDynamite(x, y);
+      }
 
       return;
     }
   }
 
   StopSound(SND_ZISCH);
-  Bang(x,y);
+  Bang(x, y);
 }
 
 void Explode(int ex, int ey, int phase, int mode)
 {
-  int x,y;
+  int x, y;
   int num_phase = 9, delay = 2;
-  int last_phase = num_phase*delay;
-  int half_phase = (num_phase/2)*delay;
+  int last_phase = num_phase * delay;
+  int half_phase = (num_phase / 2) * delay;
+  int first_phase_after_start = EX_PHASE_START + 1;
 
-  if (phase==0)			/* Feld 'Store' initialisieren */
+  if (phase == EX_PHASE_START)		/* initialize 'Store[][]' field */
   {
     int center_element = Feld[ex][ey];
 
-    if (IS_MOVING(ex,ey) || IS_BLOCKED(ex,ey))
+    if (IS_MOVING(ex, ey) || IS_BLOCKED(ex, ey))
     {
-      center_element = MovingOrBlocked2Element(ex,ey);
-      RemoveMovingField(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+2;y++) for(x=ex-1;x<ex+2;x++)
+    for (y=ey-1; y<=ey+1; y++) for(x=ex-1; x<=ex+1; x++)
     {
-      int element = Feld[x][y];
+      int element;
+
+      if (!IN_LEV_FIELD(x, y) ||
+	  ((mode != EX_NORMAL || center_element == EL_AMOEBA2DIAM) &&
+	   (x != ex || y != ey)))
+	continue;
 
-      if (IS_MOVING(x,y) || IS_BLOCKED(x,y))
+      element = Feld[x][y];
+
+      if (IS_MOVING(x, y) || IS_BLOCKED(x, y))
       {
-	element = MovingOrBlocked2Element(x,y);
-	RemoveMovingField(x,y);
+	element = MovingOrBlocked2Element(x, y);
+	RemoveMovingField(x, y);
       }
 
-      if (!IN_LEV_FIELD(x,y) || IS_MASSIV(element) || element==EL_BURNING)
+      if (IS_MASSIVE(element) || element == EL_BURNING)
 	continue;
 
-      if ((mode!=EX_NORMAL || center_element==EL_AMOEBA2DIAM) &&
-	  (x!=ex || y!=ey))
+      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_LEERRAUM);
+	  Store[x][y] = 0;
+	}
+
 	continue;
+      }
 
-      if (element==EL_EXPLODING)
+      if (element == EL_EXPLODING)
 	element = Store2[x][y];
 
-      if (IS_PLAYER(ex,ey))
+      if (IS_PLAYER(ex, ey) && !PLAYER_PROTECTED(ex, ey))
       {
 	switch(StorePlayer[ex][ey])
 	{
@@ -759,41 +1317,51 @@ void Explode(int ex, int ey, int phase, int mode)
 	    Store[x][y] = EL_EDELSTEIN_GELB;
 	    break;
 	}
+
+	if (game.emulation == EMU_SUPAPLEX)
+	  Store[x][y] = EL_LEERRAUM;
       }
-      else if (center_element==EL_MAULWURF)
+      else if (center_element == EL_MOLE)
 	Store[x][y] = EL_EDELSTEIN_ROT;
-      else if (center_element==EL_PINGUIN)
+      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)
+      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)
+      else if (center_element == EL_SP_ELECTRON)
+	Store[x][y] = EL_SP_INFOTRON;
+      else if (center_element == EL_MAMPFER)
+	Store[x][y] = level.yam_content[game.yam_content_nr][x-ex+1][y-ey+1];
+      else if (center_element == EL_AMOEBA2DIAM)
+	Store[x][y] = level.amoeba_content;
+      else if (element == EL_ERZ_EDEL)
 	Store[x][y] = EL_EDELSTEIN;
-      else if (element==EL_ERZ_DIAM)
+      else if (element == EL_ERZ_DIAM)
 	Store[x][y] = EL_DIAMANT;
-      else if (element==EL_ERZ_EDEL_BD)
+      else if (element == EL_ERZ_EDEL_BD)
 	Store[x][y] = EL_EDELSTEIN_BD;
-      else if (element==EL_ERZ_EDEL_GELB)
+      else if (element == EL_ERZ_EDEL_GELB)
 	Store[x][y] = EL_EDELSTEIN_GELB;
-      else if (element==EL_ERZ_EDEL_ROT)
+      else if (element == EL_ERZ_EDEL_ROT)
 	Store[x][y] = EL_EDELSTEIN_ROT;
-      else if (element==EL_ERZ_EDEL_LILA)
+      else if (element == EL_ERZ_EDEL_LILA)
 	Store[x][y] = EL_EDELSTEIN_LILA;
+      else if (element == EL_WALL_PEARL)
+	Store[x][y] = EL_PEARL;
+      else if (element == EL_WALL_CRYSTAL)
+	Store[x][y] = EL_CRYSTAL;
       else if (!IS_PFORTE(Store[x][y]))
 	Store[x][y] = EL_LEERRAUM;
 
-      if (x!=ex || y!=ey || center_element==EL_AMOEBA2DIAM || mode==EX_BORDER)
+      if (x != ex || y != ey ||
+	  center_element == EL_AMOEBA2DIAM || mode == EX_BORDER)
 	Store2[x][y] = element;
 
       if (AmoebaNr[x][y] &&
-	  (element==EL_AMOEBE_VOLL ||
-	   element==EL_AMOEBE_BD ||
-	   element==EL_AMOEBING))
+	  (element == EL_AMOEBE_VOLL ||
+	   element == EL_AMOEBE_BD ||
+	   element == EL_AMOEBING))
       {
 	AmoebaCnt[AmoebaNr[x][y]]--;
 	AmoebaCnt2[AmoebaNr[x][y]]--;
@@ -806,8 +1374,8 @@ void Explode(int ex, int ey, int phase, int mode)
       Stop[x][y] = TRUE;
     }
 
-    if (center_element==EL_MAMPFER)
-      MampferNr = (MampferNr+1) % 4;
+    if (center_element == EL_MAMPFER)
+      game.yam_content_nr = (game.yam_content_nr + 1) % level.num_yam_contents;
 
     return;
   }
@@ -818,90 +1386,128 @@ void Explode(int ex, int ey, int phase, int mode)
   x = ex;
   y = ey;
 
-  Frame[x][y] = (phase<last_phase ? phase+1 : 0);
+  Frame[x][y] = (phase < last_phase ? phase + 1 : 0);
 
-  if (phase==half_phase)
+  if (phase == first_phase_after_start)
   {
     int element = Store2[x][y];
 
-    if (IS_PLAYER(x,y))
-      KillHero(PLAYERINFO(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 (IS_EXPLOSIVE(element))
     {
       Feld[x][y] = Store2[x][y];
       Store2[x][y] = 0;
-      Bang(x,y);
+      Bang(x, y);
     }
-    else if (element==EL_AMOEBA2DIAM)
-      AmoebeUmwandeln(x,y);
+    else if (element == EL_AMOEBA2DIAM)
+      AmoebeUmwandeln(x, y);
   }
 
-  if (phase==last_phase)
+  if (phase == last_phase)
   {
     int element;
 
     element = Feld[x][y] = Store[x][y];
     Store[x][y] = Store2[x][y] = 0;
     MovDir[x][y] = MovPos[x][y] = MovDelay[x][y] = 0;
+    InitField(x, y, FALSE);
     if (CAN_MOVE(element) || COULD_MOVE(element))
-      InitMovDir(x,y);
-    DrawLevelField(x,y);
+      InitMovDir(x, y);
+    DrawLevelField(x, y);
   }
-  else if (!(phase%delay) && IN_SCR_FIELD(SCREENX(x),SCREENY(y)))
+  else if (!(phase % delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
   {
-    if (phase==delay)
-      ErdreichAnbroeckeln(SCREENX(x),SCREENY(y));
+    int graphic = GFX_EXPLOSION;
+
+    if (game.emulation == EMU_SUPAPLEX)
+      graphic = (Store[x][y] == EL_SP_INFOTRON ?
+		 GFX_SP_EXPLODE_INFOTRON :
+		 GFX_SP_EXPLODE_EMPTY);
+
+    if (phase == delay)
+      ErdreichAnbroeckeln(SCREENX(x), SCREENY(y));
 
-    DrawGraphic(SCREENX(x),SCREENY(y),GFX_EXPLOSION+(phase/delay-1));
+    DrawGraphic(SCREENX(x), SCREENY(y), graphic + (phase / delay - 1));
   }
 }
 
 void DynaExplode(int ex, int ey)
 {
-  int i,j;
-  struct PlayerInfo *player = &stored_player[Store2[ex][ey] - EL_SPIELER1];
+  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 }
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
   };
 
-  Store2[ex][ey] = 0;	/* delete player information */
+  if (IS_ACTIVE_BOMB(Feld[ex][ey]))
+  {
+    player = &stored_player[Feld[ex][ey] - EL_DYNABOMB_ACTIVE_1];
+    dynabomb_size = player->dynabomb_size;
+    dynabomb_xl = player->dynabomb_xl;
+    player->dynabombs_left++;
+  }
 
-  Explode(ex,ey,0,EX_CENTER);
+  Explode(ex, ey, EX_PHASE_START, EX_CENTER);
 
-  for(i=0;i<4;i++)
+  for (i=0; i<4; i++)
   {
-    for(j=1; j<=player->dynabomb_size; j++)
+    for (j=1; j<=dynabomb_size; j++)
     {
-      int x = ex+j*xy[i%4][0];
-      int y = ey+j*xy[i%4][1];
+      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_MASSIV(Feld[x][y]))
+      if (!IN_LEV_FIELD(x, y) || IS_MASSIVE(Feld[x][y]))
 	break;
 
       element = Feld[x][y];
-      Explode(x,y,0,EX_BORDER);
+
+      /* do not restart explosions of fields with active bombs */
+      if (element == EL_EXPLODING && IS_ACTIVE_BOMB(Store2[x][y]))
+	continue;
+
+      Explode(x, y, EX_PHASE_START, EX_BORDER);
 
       if (element != EL_LEERRAUM &&
 	  element != EL_ERDREICH &&
 	  element != EL_EXPLODING &&
-	  !player->dynabomb_xl)
+	  !dynabomb_xl)
 	break;
     }
   }
-
-  player->dynabombs_left++;
 }
 
 void Bang(int x, int y)
 {
   int element = Feld[x][y];
 
-  PlaySoundLevel(x,y,SND_ROAAAR);
+  if (game.emulation == EMU_SUPAPLEX)
+    PlaySoundLevel(x, y, SND_SP_BOOOM);
+  else
+    PlaySoundLevel(x, y, SND_ROAAAR);
+
+#if 0
+  if (IS_PLAYER(x, y))	/* remove objects that might cause smaller explosion */
+    element = EL_LEERRAUM;
+#endif
 
   switch(element)
   {
@@ -913,105 +1519,289 @@ void Bang(int x, int y)
     case EL_MAMPFER2:
     case EL_ROBOT:
     case EL_PACMAN:
+    case EL_MOLE:
       RaiseScoreElement(element);
-      Explode(x,y,0,EX_NORMAL);
+      Explode(x, y, EX_PHASE_START, EX_NORMAL);
       break;
-    case EL_DYNABOMB:
+    case EL_DYNABOMB_ACTIVE_1:
+    case EL_DYNABOMB_ACTIVE_2:
+    case EL_DYNABOMB_ACTIVE_3:
+    case EL_DYNABOMB_ACTIVE_4:
     case EL_DYNABOMB_NR:
     case EL_DYNABOMB_SZ:
     case EL_DYNABOMB_XL:
-      DynaExplode(x,y);
+      DynaExplode(x, y);
       break;
+    case EL_PINGUIN:
     case EL_BIRNE_AUS:
     case EL_BIRNE_EIN:
-      Explode(x,y,0,EX_CENTER);
+      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,0,EX_NORMAL);
+      Explode(x, y, EX_PHASE_START, EX_NORMAL);
       break;
   }
 }
 
-void Blurb(int x, int y)
+void Blurb(int x, int y)
+{
+  int element = Feld[x][y];
+
+  if (element != EL_BLURB_LEFT && element != EL_BLURB_RIGHT)	/* start */
+  {
+    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))))
+    {
+      Feld[x+1][y] = EL_BLURB_RIGHT;
+    }
+  }
+  else								/* go on */
+  {
+    int graphic = (element==EL_BLURB_LEFT ? GFX_BLURB_LEFT : GFX_BLURB_RIGHT);
+
+    if (!MovDelay[x][y])	/* initialize animation counter */
+      MovDelay[x][y] = 9;
+
+    if (MovDelay[x][y])		/* continue animation */
+    {
+      MovDelay[x][y]--;
+      if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+	DrawGraphic(SCREENX(x), SCREENY(y), graphic+4-MovDelay[x][y]/2);
+
+      if (!MovDelay[x][y])
+      {
+	Feld[x][y] = EL_LEERRAUM;
+	DrawLevelField(x, y);
+      }
+    }
+  }
+}
+
+static void ToggleBeltSwitch(int x, int y)
+{
+  static int belt_base_element[4] =
+  {
+    EL_BELT1_SWITCH_LEFT,
+    EL_BELT2_SWITCH_LEFT,
+    EL_BELT3_SWITCH_LEFT,
+    EL_BELT4_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 = getBeltNrFromSwitchElement(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;
+
+  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;
+
+  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 = getBeltNrFromSwitchElement(element);
+
+	if (e_belt_nr == belt_nr)
+	{
+	  Feld[xx][yy] = belt_base_element[belt_nr] + belt_dir_nr;
+	  DrawLevelField(xx, yy);
+	}
+      }
+      else if (belt_dir == MV_NO_MOVING && IS_BELT(element))
+      {
+	int e_belt_nr = getBeltNrFromElement(element);
+
+	if (e_belt_nr == belt_nr)
+	  DrawLevelField(xx, yy);    /* set belt to parking position */
+      }
+    }
+  }
+}
+
+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_1 ||
+	  element == EL_SWITCHGATE_SWITCH_2)
+      {
+	Feld[xx][yy] = EL_SWITCHGATE_SWITCH_1 + game.switchgate_pos;
+	DrawLevelField(xx, yy);
+      }
+      else if (element == EL_SWITCHGATE_OPEN ||
+	       element == EL_SWITCHGATE_OPENING)
+      {
+	Feld[xx][yy] = EL_SWITCHGATE_CLOSING;
+	PlaySoundLevel(xx, yy, SND_OEFFNEN);
+      }
+      else if (element == EL_SWITCHGATE_CLOSED ||
+	       element == EL_SWITCHGATE_CLOSING)
+      {
+	Feld[xx][yy] = EL_SWITCHGATE_OPENING;
+	PlaySoundLevel(xx, yy, SND_OEFFNEN);
+      }
+    }
+  }
+}
+
+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_OFF &&
+	  game.light_time_left > 0)
+      {
+	Feld[x][y] = EL_LIGHT_SWITCH_ON;
+	DrawLevelField(x, y);
+      }
+      else if (element == EL_LIGHT_SWITCH_ON &&
+	       game.light_time_left == 0)
+      {
+	Feld[x][y] = EL_LIGHT_SWITCH_OFF;
+	DrawLevelField(x, y);
+      }
+
+      if (element == EL_INVISIBLE_STEEL ||
+	  element == EL_UNSICHTBAR ||
+	  element == EL_SAND_INVISIBLE)
+	DrawLevelField(x, y);
+    }
+  }
+}
+
+static void ToggleLightSwitch(int x, int y)
+{
+  int element = Feld[x][y];
+
+  game.light_time_left =
+    (element == EL_LIGHT_SWITCH_OFF ?
+     level.time_light * FRAMES_PER_SECOND : 0);
+
+  RedrawAllLightSwitchesAndInvisibleElements();
+}
+
+static void ActivateTimegateSwitch(int x, int y)
 {
-  int element = Feld[x][y];
+  int xx, yy;
 
-  if (element!=EL_BLURB_LEFT && element!=EL_BLURB_RIGHT) /* Anfang */
+  game.timegate_time_left = level.time_timegate * FRAMES_PER_SECOND;
+
+  for (yy=0; yy<lev_fieldy; yy++)
   {
-    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 (xx=0; xx<lev_fieldx; xx++)
     {
-      Feld[x+1][y] = EL_BLURB_RIGHT;
-    }
-  }
-  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;
+      int element = Feld[xx][yy];
 
-    if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
-    {
-      MovDelay[x][y]--;
-      if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x),SCREENY(y)))
-	DrawGraphic(SCREENX(x),SCREENY(y),graphic+4-MovDelay[x][y]/2);
+      if (element == EL_TIMEGATE_CLOSED ||
+	  element == EL_TIMEGATE_CLOSING)
+      {
+	Feld[xx][yy] = EL_TIMEGATE_OPENING;
+	PlaySoundLevel(xx, yy, SND_OEFFNEN);
+      }
 
-      if (!MovDelay[x][y])
+      /*
+      else if (element == EL_TIMEGATE_SWITCH_ON)
       {
-	Feld[x][y] = EL_LEERRAUM;
-	DrawLevelField(x,y);
+	Feld[xx][yy] = EL_TIMEGATE_SWITCH_OFF;
+	DrawLevelField(xx, yy);
       }
+      */
+
     }
   }
+
+  Feld[x][y] = EL_TIMEGATE_SWITCH_ON;
 }
 
 void Impact(int x, int y)
 {
-  BOOL lastline = (y==lev_fieldy-1);
-  BOOL object_hit = FALSE;
+  boolean lastline = (y == lev_fieldy-1);
+  boolean object_hit = FALSE;
   int element = Feld[x][y];
   int smashed = 0;
 
-  /* Element darunter berührt? */
-  if (!lastline)
+  if (!lastline)	/* check if element below was hit */
   {
-    object_hit = (!IS_FREE(x,y+1) && (!IS_MOVING(x,y+1) ||
+    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);
+      smashed = MovingOrBlocked2Element(x, y+1);
   }
 
-  /* Auftreffendes Element fällt in Salzsäure */
-  if (!lastline && smashed==EL_SALZSAEURE)
+  if (!lastline && smashed == EL_SALZSAEURE)	/* element falls into acid */
   {
-    Blurb(x,y);
+    Blurb(x, y);
     return;
   }
 
-  /* Auftreffendes Element ist Bombe */
-  if (element==EL_BOMBE && (lastline || object_hit))
+  if ((element == EL_BOMBE ||
+       element == EL_SP_DISK_ORANGE ||
+       element == EL_DX_SUPABOMB) &&
+      (lastline || object_hit))	/* element is bomb */
+  {
+    Bang(x, y);
+    return;
+  }
+  else if (element == EL_PEARL)
   {
-    Bang(x,y);
+    Feld[x][y] = EL_PEARL_BREAKING;
+    PlaySoundLevel(x, y, SND_KNACK);
     return;
   }
 
-  /* Auftreffendes Element ist Säuretropfen */
-  if (element==EL_TROPFEN && (lastline || object_hit))
+  if (element == EL_TROPFEN && (lastline || object_hit))	/* acid drop */
   {
-    if (object_hit && IS_PLAYER(x,y+1))
-      KillHero(PLAYERINFO(x,y+1));
-    else if (object_hit && (smashed==EL_MAULWURF || smashed==EL_PINGUIN))
-      Bang(x,y+1);
+    if (object_hit && IS_PLAYER(x, y+1))
+      KillHeroUnlessProtected(x, y+1);
+    else if (object_hit && smashed == EL_PINGUIN)
+      Bang(x, y+1);
     else
     {
       Feld[x][y] = EL_AMOEBING;
@@ -1020,71 +1810,112 @@ void Impact(int x, int y)
     return;
   }
 
-  /* Welches Element kriegt was auf die Rübe? */
-  if (!lastline && object_hit)
+  if (!lastline && object_hit)		/* check which object was hit */
   {
     if (CAN_CHANGE(element) && 
-	(smashed==EL_SIEB_LEER || smashed==EL_SIEB2_LEER) && !SiebAktiv)
-      SiebAktiv = level.dauer_sieb * FRAMES_PER_SECOND;
+	(smashed == EL_MAGIC_WALL_OFF || smashed == EL_MAGIC_WALL_BD_OFF))
+    {
+      int x, y;
+      int activated_magic_wall =
+	(smashed == EL_MAGIC_WALL_OFF ? EL_MAGIC_WALL_EMPTY :
+	 EL_MAGIC_WALL_BD_EMPTY);
+
+      /* activate magic wall / mill */
 
-    if (IS_PLAYER(x,y+1))
+      for (y=0; y<lev_fieldy; y++)
+	for (x=0; x<lev_fieldx; x++)
+	  if (Feld[x][y] == smashed)
+	    Feld[x][y] = activated_magic_wall;
+
+      game.magic_wall_time_left = level.time_magic_wall * FRAMES_PER_SECOND;
+      game.magic_wall_active = TRUE;
+    }
+
+    if (IS_PLAYER(x, y+1))
     {
-      KillHero(PLAYERINFO(x,y+1));
+      KillHeroUnlessProtected(x, y+1);
       return;
     }
-    else if (smashed==EL_MAULWURF || smashed==EL_PINGUIN)
+    else if (smashed == EL_PINGUIN)
     {
-      Bang(x,y+1);
+      Bang(x, y+1);
       return;
     }
-    else if (element==EL_EDELSTEIN_BD)
+    else if (element == EL_EDELSTEIN_BD)
     {
       if (IS_ENEMY(smashed) && IS_BD_ELEMENT(smashed))
       {
-	Bang(x,y+1);
+	Bang(x, y+1);
 	return;
       }
     }
-    else if (element==EL_FELSBROCKEN)
+    else if (element == EL_FELSBROCKEN ||
+	     element == EL_SP_ZONK ||
+	     element == EL_BD_ROCK)
     {
-      if (IS_ENEMY(smashed) || smashed==EL_BOMBE || smashed==EL_SONDE ||
-	  smashed==EL_SCHWEIN || smashed==EL_DRACHE)
+      if (IS_ENEMY(smashed) ||
+	  smashed == EL_BOMBE || smashed == EL_SP_DISK_ORANGE ||
+	  smashed == EL_DX_SUPABOMB ||
+	  smashed == EL_SONDE || smashed == EL_SCHWEIN ||
+	  smashed == EL_DRACHE || smashed == EL_MOLE)
       {
-	Bang(x,y+1);
+	Bang(x, y+1);
 	return;
       }
-      else if (!IS_MOVING(x,y+1))
+      else if (!IS_MOVING(x, y+1))
       {
-	if (smashed==EL_BIRNE_AUS || smashed==EL_BIRNE_EIN)
+	if (smashed == EL_BIRNE_AUS || smashed == EL_BIRNE_EIN)
 	{
-	  Bang(x,y+1);
+	  Bang(x, y+1);
 	  return;
 	}
-	else if (smashed==EL_KOKOSNUSS)
+	else if (smashed == EL_KOKOSNUSS)
 	{
 	  Feld[x][y+1] = EL_CRACKINGNUT;
-	  PlaySoundLevel(x,y,SND_KNACK);
+	  PlaySoundLevel(x, y, SND_KNACK);
 	  RaiseScoreElement(EL_KOKOSNUSS);
 	  return;
 	}
-	else if (smashed==EL_DIAMANT)
+	else if (smashed == EL_PEARL)
+	{
+	  Feld[x][y+1] = EL_PEARL_BREAKING;
+	  PlaySoundLevel(x, y, SND_KNACK);
+	  return;
+	}
+	else if (smashed == EL_DIAMANT)
 	{
 	  Feld[x][y+1] = EL_LEERRAUM;
-	  PlaySoundLevel(x,y,SND_QUIRK);
+	  PlaySoundLevel(x, y, SND_QUIRK);
 	  return;
 	}
+	else if (IS_BELT_SWITCH(smashed))
+	{
+	  ToggleBeltSwitch(x, y+1);
+	}
+	else if (smashed == EL_SWITCHGATE_SWITCH_1 ||
+		 smashed == EL_SWITCHGATE_SWITCH_2)
+	{
+	  ToggleSwitchgateSwitch(x, y+1);
+	}
+	else if (smashed == EL_LIGHT_SWITCH_OFF ||
+		 smashed == EL_LIGHT_SWITCH_ON)
+	{
+	  ToggleLightSwitch(x, y+1);
+	}
       }
     }
   }
 
-  /* Geräusch beim Durchqueren des Siebes */
-  if (!lastline && (Feld[x][y+1]==EL_SIEB_LEER || Feld[x][y+1]==EL_SIEB2_LEER))
+  /* play sound of magic wall / mill */
+  if (!lastline &&
+      (Feld[x][y+1] == EL_MAGIC_WALL_EMPTY ||
+       Feld[x][y+1] == EL_MAGIC_WALL_BD_EMPTY))
   {
-    PlaySoundLevel(x,y,SND_QUIRK);
+    PlaySoundLevel(x, y, SND_QUIRK);
     return;
   }
 
-  /* Geräusch beim Auftreffen */
+  /* play sound of object that hits the ground */
   if (lastline || object_hit)
   {
     int sound;
@@ -1097,19 +1928,28 @@ void Impact(int x, int y)
       case EL_EDELSTEIN_ROT:
       case EL_EDELSTEIN_LILA:
       case EL_DIAMANT:
+      case EL_SP_INFOTRON:
         sound = SND_PLING;
 	break;
       case EL_KOKOSNUSS:
 	sound = SND_KLUMPF;
 	break;
       case EL_FELSBROCKEN:
+      case EL_BD_ROCK:
 	sound = SND_KLOPF;
 	break;
+      case EL_SP_ZONK:
+	sound = SND_SP_ZONKDOWN;
+	break;
       case EL_SCHLUESSEL:
       case EL_SCHLUESSEL1:
       case EL_SCHLUESSEL2:
       case EL_SCHLUESSEL3:
       case EL_SCHLUESSEL4:
+      case EL_EM_KEY_1:
+      case EL_EM_KEY_2:
+      case EL_EM_KEY_3:
+      case EL_EM_KEY_4:
 	sound = SND_KINK;
 	break;
       case EL_ZEIT_VOLL:
@@ -1121,8 +1961,8 @@ void Impact(int x, int y)
         break;
     }
 
-    if (sound>=0)
-      PlaySoundLevel(x,y,sound);
+    if (sound >= 0)
+      PlaySoundLevel(x, y, sound);
   }
 }
 
@@ -1130,20 +1970,20 @@ void TurnRound(int x, int y)
 {
   static struct
   {
-    int x,y;
+    int x, y;
   } move_xy[] =
   {
-    { 0,0 },
-    {-1,0 },
-    {+1,0 },
-    { 0,0 },
-    { 0,-1 },
-    { 0,0 }, { 0,0 }, { 0,0 },
-    { 0,+1 }
+    { 0, 0 },
+    {-1, 0 },
+    {+1, 0 },
+    { 0, 0 },
+    { 0, -1 },
+    { 0, 0 }, { 0, 0 }, { 0, 0 },
+    { 0, +1 }
   };
   static struct
   {
-    int left,right,back;
+    int left, right, back;
   } turn[] =
   {
     { 0,	0,		0 },
@@ -1170,48 +2010,51 @@ void TurnRound(int x, int y)
   int right_x = x+right_dx, right_y = y+right_dy;
   int move_x = x+move_dx, move_y = y+move_dy;
 
-  if (element==EL_KAEFER || element==EL_BUTTERFLY)
+  if (element == EL_KAEFER || element == EL_BUTTERFLY)
   {
-    TestIfBadThingHitsOtherBadThing(x,y);
+    TestIfBadThingHitsOtherBadThing(x, y);
 
-    if (IN_LEV_FIELD(right_x,right_y) &&
-	IS_FREE_OR_PLAYER(right_x,right_y))
+    if (IN_LEV_FIELD(right_x, right_y) &&
+	IS_FREE(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))
+    else if (!IN_LEV_FIELD(move_x, move_y) ||
+	     !IS_FREE(move_x, move_y))
       MovDir[x][y] = left_dir;
 
-    if (element==EL_KAEFER && MovDir[x][y] != old_move_dir)
+    if (element == EL_KAEFER && MovDir[x][y] != old_move_dir)
       MovDelay[x][y] = 9;
-    else if (element==EL_BUTTERFLY)	/* && MovDir[x][y]==left_dir) */
+    else if (element == EL_BUTTERFLY)	/* && MovDir[x][y] == left_dir) */
       MovDelay[x][y] = 1;
   }
-  else if (element==EL_FLIEGER || element==EL_FIREFLY)
+  else if (element == EL_FLIEGER || element == EL_FIREFLY ||
+	   element == EL_SP_SNIKSNAK || element == EL_SP_ELECTRON)
   {
-    TestIfBadThingHitsOtherBadThing(x,y);
+    TestIfBadThingHitsOtherBadThing(x, y);
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	IS_FREE_OR_PLAYER(left_x,left_y))
+    if (IN_LEV_FIELD(left_x, left_y) &&
+	IS_FREE(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))
+    else if (!IN_LEV_FIELD(move_x, move_y) ||
+	     !IS_FREE(move_x, move_y))
       MovDir[x][y] = right_dir;
 
-    if (element==EL_FLIEGER && MovDir[x][y] != old_move_dir)
+    if ((element == EL_FLIEGER ||
+	 element == EL_SP_SNIKSNAK || element == EL_SP_ELECTRON)
+	&& MovDir[x][y] != old_move_dir)
       MovDelay[x][y] = 9;
-    else if (element==EL_FIREFLY)	/* && MovDir[x][y]==right_dir) */
+    else if (element == EL_FIREFLY)	/* && MovDir[x][y] == right_dir) */
       MovDelay[x][y] = 1;
   }
-  else if (element==EL_MAMPFER)
+  else if (element == EL_MAMPFER)
   {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE;
+    boolean can_turn_left = FALSE, can_turn_right = FALSE;
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	(IS_FREE_OR_PLAYER(left_x,left_y) ||
+    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) ||
+    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;
 
@@ -1226,16 +2069,16 @@ void TurnRound(int x, int y)
 
     MovDelay[x][y] = 16+16*RND(3);
   }
-  else if (element==EL_MAMPFER2)
+  else if (element == EL_MAMPFER2)
   {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE;
+    boolean can_turn_left = FALSE, can_turn_right = FALSE;
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	(IS_FREE_OR_PLAYER(left_x,left_y) ||
+    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) ||
+    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;
 
@@ -1250,16 +2093,16 @@ void TurnRound(int x, int y)
 
     MovDelay[x][y] = 16+16*RND(3);
   }
-  else if (element==EL_PACMAN)
+  else if (element == EL_PACMAN)
   {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE;
+    boolean can_turn_left = FALSE, can_turn_right = FALSE;
 
-    if (IN_LEV_FIELD(left_x,left_y) &&
-	(IS_FREE_OR_PLAYER(left_x,left_y) ||
+    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) ||
+    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;
 
@@ -1274,40 +2117,40 @@ void TurnRound(int x, int y)
 
     MovDelay[x][y] = 6+RND(40);
   }
-  else if (element==EL_SCHWEIN)
+  else if (element == EL_SCHWEIN)
   {
-    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;
+    boolean can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
+    boolean should_turn_left = FALSE, should_turn_right = FALSE;
+    boolean should_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) || IS_GEM(Feld[left_x][left_y])))
+    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])))
+    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])))
+    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))))
+	 (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))))
+	 (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))))
+	 (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;
 
     if (should_turn_left || should_turn_right || should_move_on)
@@ -1340,23 +2183,23 @@ void TurnRound(int x, int y)
     else
       MovDir[x][y] = back_dir;
 
-    if (!IS_FREE(x+move_xy[MovDir[x][y]].x,y+move_xy[MovDir[x][y]].y) &&
+    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;
 
     MovDelay[x][y] = 0;
   }
-  else if (element==EL_DRACHE)
+  else if (element == EL_DRACHE)
   {
-    BOOL can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
+    boolean 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))
+    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))
+    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))
+    if (IN_LEV_FIELD(move_x, move_y) && IS_FREE(move_x, move_y))
       can_move_on = TRUE;
 
     if (can_move_on && rnd > rnd_value/8)
@@ -1370,13 +2213,56 @@ void TurnRound(int x, int y)
     else
       MovDir[x][y] = back_dir;
 
-    if (!IS_FREE(x+move_xy[MovDir[x][y]].x,y+move_xy[MovDir[x][y]].y))
+    if (!IS_FREE(x+move_xy[MovDir[x][y]].x, y+move_xy[MovDir[x][y]].y))
       MovDir[x][y] = old_move_dir;
 
     MovDelay[x][y] = 0;
   }
-  else if (element==EL_ROBOT || element==EL_SONDE ||
-	   element==EL_MAULWURF || element==EL_PINGUIN)
+  else if (element == EL_MOLE)
+  {
+    boolean can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
+
+    if (IN_LEV_FIELD(move_x, move_y) &&
+	(IS_FREE(move_x, move_y) || IS_AMOEBOID(Feld[move_x][move_y]) ||
+	 Feld[move_x][move_y] == EL_DEAMOEBING))
+      can_move_on = TRUE;
+
+    if (!can_move_on)
+    {
+      if (IN_LEV_FIELD(left_x, left_y) &&
+	  (IS_FREE(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(right_x, right_y) || IS_AMOEBOID(Feld[right_x][right_y])))
+	can_turn_right = TRUE;
+
+      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_MOVING)
+  {
+    if (!IN_LEV_FIELD(move_x, move_y) || !IS_FREE(move_x, move_y) ||
+	(IN_LEV_FIELD(x, y+1) && IS_FREE(x, y+1)))
+    {
+      Feld[x][y] = EL_SPRING;
+      MovDir[x][y] = MV_NO_MOVING;
+    }
+    MovDelay[x][y] = 0;
+  }
+  else if (element == EL_ROBOT || element == EL_SONDE || element == EL_PINGUIN)
   {
     int attr_x = -1, attr_y = -1;
 
@@ -1389,12 +2275,12 @@ void TurnRound(int x, int y)
     {
       int i;
 
-      for(i=0; i<MAX_PLAYERS; i++)
+      for (i=0; i<MAX_PLAYERS; i++)
       {
 	struct PlayerInfo *player = &stored_player[i];
 	int jx = player->jx, jy = player->jy;
 
-	if (!player->active || player->gone)
+	if (!player->active)
 	  continue;
 
 	if (attr_x == -1 || ABS(jx-x)+ABS(jy-y) < ABS(attr_x-x)+ABS(attr_y-y))
@@ -1405,29 +2291,29 @@ void TurnRound(int x, int y)
       }
     }
 
-    if (element==EL_ROBOT && ZX>=0 && ZY>=0)
+    if (element == EL_ROBOT && ZX>=0 && ZY>=0)
     {
       attr_x = ZX;
       attr_y = ZY;
     }
 
-    if (element==EL_MAULWURF || element==EL_PINGUIN)
+    if (element == EL_PINGUIN)
     {
       int i;
       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++)
       {
     	int ex = x + xy[i%4][0];
     	int ey = y + xy[i%4][1];
 
-    	if (IN_LEV_FIELD(ex,ey) && Feld[ex][ey] == EL_AUSGANG_AUF)
+    	if (IN_LEV_FIELD(ex, ey) && Feld[ex][ey] == EL_AUSGANG_AUF)
 	{
 	  attr_x = ex;
  	  attr_y = ey;
@@ -1446,15 +2332,15 @@ void TurnRound(int x, int y)
     else if (attr_y>y)
       MovDir[x][y] |= (AllPlayersGone ? MV_UP : MV_DOWN);
 
-    if (element==EL_ROBOT)
+    if (element == EL_ROBOT)
     {
       int newx, newy;
 
       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);
+      Moving2Blocked(x, y, &newx, &newy);
 
-      if (IN_LEV_FIELD(newx,newy) && IS_FREE_OR_PLAYER(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;
@@ -1467,29 +2353,29 @@ void TurnRound(int x, int y)
 
       if ((MovDir[x][y]&(MV_LEFT|MV_RIGHT)) && (MovDir[x][y]&(MV_UP|MV_DOWN)))
       {
-	BOOL first_horiz = RND(2);
+	boolean first_horiz = RND(2);
 	int new_move_dir = MovDir[x][y];
 
 	MovDir[x][y] =
 	  new_move_dir & (first_horiz ? (MV_LEFT|MV_RIGHT) : (MV_UP|MV_DOWN));
-	Moving2Blocked(x,y,&newx,&newy);
+	Moving2Blocked(x, y, &newx, &newy);
 
-	if (IN_LEV_FIELD(newx,newy) &&
-	    (IS_FREE(newx,newy) ||
+	if (IN_LEV_FIELD(newx, newy) &&
+	    (IS_FREE(newx, newy) ||
 	     Feld[newx][newy] == EL_SALZSAEURE ||
-	     ((element == EL_MAULWURF || element==EL_PINGUIN) &&
+	     (element == EL_PINGUIN &&
 	      (Feld[newx][newy] == EL_AUSGANG_AUF ||
 	       IS_MAMPF3(Feld[newx][newy])))))
 	  return;
 
 	MovDir[x][y] =
 	  new_move_dir & (!first_horiz ? (MV_LEFT|MV_RIGHT) : (MV_UP|MV_DOWN));
-	Moving2Blocked(x,y,&newx,&newy);
+	Moving2Blocked(x, y, &newx, &newy);
 
-	if (IN_LEV_FIELD(newx,newy) &&
-	    (IS_FREE(newx,newy) ||
+	if (IN_LEV_FIELD(newx, newy) &&
+	    (IS_FREE(newx, newy) ||
 	     Feld[newx][newy] == EL_SALZSAEURE ||
-	     ((element == EL_MAULWURF || element==EL_PINGUIN) &&
+	     (element == EL_PINGUIN &&
 	      (Feld[newx][newy] == EL_AUSGANG_AUF ||
 	       IS_MAMPF3(Feld[newx][newy])))))
 	  return;
@@ -1501,26 +2387,25 @@ void TurnRound(int x, int y)
   }
 }
 
-static BOOL JustBeingPushed(int x, int y)
+static boolean JustBeingPushed(int x, int y)
 {
   int i;
 
-  for(i=0; i<MAX_PLAYERS; i++)
+  for (i=0; i<MAX_PLAYERS; i++)
   {
     struct PlayerInfo *player = &stored_player[i];
 
-    if (player->active && !player->gone &&
-	player->Pushing && player->MovPos)
+    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 TRUE;
     }
   }
 
-  return(FALSE);
+  return FALSE;
 }
 
 void StartMoving(int x, int y)
@@ -1532,19 +2417,19 @@ void StartMoving(int x, int y)
 
   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))
+    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_MORAST_VOLL)
+    if (element == EL_MORAST_VOLL)
     {
-      if (IS_FREE(x,y+1))
+      if (IS_FREE(x, y+1))
       {
-	InitMovingField(x,y,MV_DOWN);
+	InitMovingField(x, y, MV_DOWN);
 	Feld[x][y] = EL_FELSBROCKEN;
 	Store[x][y] = EL_MORAST_LEER;
       }
-      else if (Feld[x][y+1]==EL_MORAST_LEER)
+      else if (Feld[x][y+1] == EL_MORAST_LEER)
       {
 	if (!MovDelay[x][y])
 	  MovDelay[x][y] = TILEY + 1;
@@ -1560,20 +2445,21 @@ void StartMoving(int x, int y)
 	Feld[x][y+1] = EL_MORAST_VOLL;
       }
     }
-    else if (element==EL_FELSBROCKEN && Feld[x][y+1]==EL_MORAST_LEER)
+    else if ((element == EL_FELSBROCKEN || element == EL_BD_ROCK) &&
+	     Feld[x][y+1] == EL_MORAST_LEER)
     {
-      InitMovingField(x,y,MV_DOWN);
+      InitMovingField(x, y, MV_DOWN);
       Store[x][y] = EL_MORAST_VOLL;
     }
-    else if (element==EL_SIEB_VOLL)
+    else if (element == EL_MAGIC_WALL_FULL)
     {
-      if (IS_FREE(x,y+1))
+      if (IS_FREE(x, y+1))
       {
-	InitMovingField(x,y,MV_DOWN);
+	InitMovingField(x, y, MV_DOWN);
 	Feld[x][y] = EL_CHANGED(Store2[x][y]);
-	Store[x][y] = EL_SIEB_LEER;
+	Store[x][y] = EL_MAGIC_WALL_EMPTY;
       }
-      else if (Feld[x][y+1]==EL_SIEB_LEER)
+      else if (Feld[x][y+1] == EL_MAGIC_WALL_EMPTY)
       {
 	if (!MovDelay[x][y])
 	  MovDelay[x][y] = TILEY/4 + 1;
@@ -1585,21 +2471,21 @@ void StartMoving(int x, int y)
 	    return;
 	}
 
-	Feld[x][y] = EL_SIEB_LEER;
-	Feld[x][y+1] = EL_SIEB_VOLL;
+	Feld[x][y] = EL_MAGIC_WALL_EMPTY;
+	Feld[x][y+1] = EL_MAGIC_WALL_FULL;
 	Store2[x][y+1] = EL_CHANGED(Store2[x][y]);
 	Store2[x][y] = 0;
       }
     }
-    else if (element==EL_SIEB2_VOLL)
+    else if (element == EL_MAGIC_WALL_BD_FULL)
     {
-      if (IS_FREE(x,y+1))
+      if (IS_FREE(x, y+1))
       {
-	InitMovingField(x,y,MV_DOWN);
+	InitMovingField(x, y, MV_DOWN);
 	Feld[x][y] = EL_CHANGED2(Store2[x][y]);
-	Store[x][y] = EL_SIEB2_LEER;
+	Store[x][y] = EL_MAGIC_WALL_BD_EMPTY;
       }
-      else if (Feld[x][y+1]==EL_SIEB2_LEER)
+      else if (Feld[x][y+1] == EL_MAGIC_WALL_BD_EMPTY)
       {
 	if (!MovDelay[x][y])
 	  MovDelay[x][y] = TILEY/4 + 1;
@@ -1611,95 +2497,125 @@ void StartMoving(int x, int y)
 	    return;
 	}
 
-	Feld[x][y] = EL_SIEB2_LEER;
-	Feld[x][y+1] = EL_SIEB2_VOLL;
+	Feld[x][y] = EL_MAGIC_WALL_BD_EMPTY;
+	Feld[x][y+1] = EL_MAGIC_WALL_BD_FULL;
 	Store2[x][y+1] = EL_CHANGED2(Store2[x][y]);
 	Store2[x][y] = 0;
       }
     }
-    else if (SiebAktiv && CAN_CHANGE(element) &&
-	     (Feld[x][y+1]==EL_SIEB_LEER || Feld[x][y+1]==EL_SIEB2_LEER))
+    else if (CAN_CHANGE(element) &&
+	     (Feld[x][y+1] == EL_MAGIC_WALL_EMPTY ||
+	      Feld[x][y+1] == EL_MAGIC_WALL_BD_EMPTY))
     {
-      InitMovingField(x,y,MV_DOWN);
+      InitMovingField(x, y, MV_DOWN);
       Store[x][y] =
-	(Feld[x][y+1]==EL_SIEB_LEER ? EL_SIEB_VOLL : EL_SIEB2_VOLL);
+	(Feld[x][y+1] == EL_MAGIC_WALL_EMPTY ? EL_MAGIC_WALL_FULL :
+	 EL_MAGIC_WALL_BD_FULL);
       Store2[x][y+1] = element;
     }
-    else if (CAN_SMASH(element) && Feld[x][y+1]==EL_SALZSAEURE)
+    else if (CAN_SMASH(element) && Feld[x][y+1] == EL_SALZSAEURE)
     {
-      Blurb(x,y);
-      InitMovingField(x,y,MV_DOWN);
+      Blurb(x, y);
+      InitMovingField(x, y, MV_DOWN);
       Store[x][y] = EL_SALZSAEURE;
     }
-    else if (CAN_SMASH(element) && Feld[x][y+1]==EL_BLOCKED && JustHit[x][y])
+    else if (CAN_SMASH(element) && Feld[x][y+1] == EL_BLOCKED &&
+	     JustStopped[x][y])
     {
-      Impact(x,y);
+      Impact(x, y);
     }
-    else if (IS_FREE(x,y+1))
+    else if (IS_FREE(x, y+1))
     {
-      InitMovingField(x,y,MV_DOWN);
+      InitMovingField(x, y, MV_DOWN);
     }
-    else if (element==EL_TROPFEN)
+    else if (element == EL_TROPFEN)
     {
       Feld[x][y] = EL_AMOEBING;
       Store[x][y] = EL_AMOEBE_NASS;
     }
+#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
     {
-      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));
+      boolean left  = (x>0 && IS_FREE(x-1, y) &&
+		       (IS_FREE(x-1, y+1) || Feld[x-1][y+1] == EL_SALZSAEURE));
+      boolean right = (x<lev_fieldx-1 && IS_FREE(x+1, y) &&
+		       (IS_FREE(x+1, y+1) || Feld[x+1][y+1] == EL_SALZSAEURE));
 
       if (left || right)
       {
-	if (left && right && game_emulation != EMU_BOULDERDASH)
+	if (left && right &&
+	    (game.emulation != EMU_BOULDERDASH &&
+	     element != EL_BD_ROCK && element != EL_EDELSTEIN_BD))
 	  left = !(right = RND(2));
 
-	InitMovingField(x,y,left ? MV_LEFT : MV_RIGHT);
+	InitMovingField(x, y, left ? MV_LEFT : MV_RIGHT);
       }
     }
+    else if (IS_BELT(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 = getBeltNrFromElement(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);
+    }
   }
   else if (CAN_MOVE(element))
   {
-    int newx,newy;
+    int newx, newy;
 
-    if (element == EL_SONDE && JustBeingPushed(x,y))
+    if ((element == EL_SONDE || element == EL_BALLOON ||
+	 element == EL_SPRING_MOVING)
+	&& JustBeingPushed(x, y))
       return;
 
-    if (!MovDelay[x][y])	/* neuer Schritt / noch nicht gewartet */
+    if (!MovDelay[x][y])	/* start new movement phase */
     {
-      /* Alle Figuren, die nach jeden Schritt die Richtung wechseln können.
-       * (MAMPFER, MAMPFER2 und PACMAN laufen bis zur nächsten Wand.)
-       */
+      /* all objects that can change their move direction after each step */
+      /* (MAMPFER, MAMPFER2 and PACMAN go straight until they hit a wall  */
 
       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);
+	TurnRound(x, y);
+	if (MovDelay[x][y] && (element == EL_KAEFER ||
+			       element == EL_FLIEGER ||
+			       element == EL_SP_SNIKSNAK ||
+			       element == EL_SP_ELECTRON ||
+			       element == EL_MOLE))
+	  DrawLevelField(x, y);
       }
     }
 
-    if (MovDelay[x][y])		/* neuer Schritt / in Wartezustand */
+    if (MovDelay[x][y])		/* wait some time before next movement */
     {
       MovDelay[x][y]--;
 
-      if (element==EL_ROBOT || element==EL_MAMPFER || element==EL_MAMPFER2)
+      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(SCREENX(x),SCREENY(y)))
-	  DrawGraphic(SCREENX(x),SCREENY(y), el2gfx(element)+phase);
+	if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+	  DrawGraphic(SCREENX(x), SCREENY(y), el2gfx(element)+phase);
 
-	if ((element==EL_MAMPFER || element==EL_MAMPFER2)
-	    && MovDelay[x][y]%4==3)
-	  PlaySoundLevel(x,y,SND_NJAM);
+	if ((element == EL_MAMPFER || element == EL_MAMPFER2)
+	    && MovDelay[x][y]%4 == 3)
+	  PlaySoundLevel(x, y, SND_NJAM);
       }
-      else if (element==EL_DRACHE)
+      else if (element == EL_SP_ELECTRON)
+	DrawGraphicAnimation(x, y, GFX2_SP_ELECTRON, 8, 2, ANIM_NORMAL);
+      else if (element == EL_DRACHE)
       {
 	int i;
 	int dir = MovDir[x][y];
@@ -1711,33 +2627,33 @@ void StartMoving(int x, int y)
 		       dir == MV_DOWN	? GFX_FLAMMEN_DOWN : GFX_LEERRAUM);
 	int phase = FrameCounter % 2;
 
-	for(i=1;i<=3;i++)
+	for (i=1; i<=3; i++)
 	{
 	  int xx = x + i*dx, yy = y + i*dy;
 	  int sx = SCREENX(xx), sy = SCREENY(yy);
 
-	  if (!IN_LEV_FIELD(xx,yy) ||
-	      IS_SOLID(Feld[xx][yy]) || Feld[xx][yy]==EL_EXPLODING)
+	  if (!IN_LEV_FIELD(xx, yy) ||
+	      IS_SOLID(Feld[xx][yy]) || Feld[xx][yy] == EL_EXPLODING)
 	    break;
 
 	  if (MovDelay[x][y])
 	  {
-	    int flamed = MovingOrBlocked2Element(xx,yy);
+	    int flamed = MovingOrBlocked2Element(xx, yy);
 
 	    if (IS_ENEMY(flamed) || IS_EXPLOSIVE(flamed))
-	      Bang(xx,yy);
+	      Bang(xx, yy);
 	    else
-	      RemoveMovingField(xx,yy);
+	      RemoveMovingField(xx, yy);
 
 	    Feld[xx][yy] = EL_BURNING;
-	    if (IN_SCR_FIELD(sx,sy))
-	      DrawGraphic(sx,sy, graphic + phase*3 + i-1);
+	    if (IN_SCR_FIELD(sx, sy))
+	      DrawGraphic(sx, sy, graphic + phase*3 + i-1);
 	  }
 	  else
 	  {
 	    if (Feld[xx][yy] == EL_BURNING)
 	      Feld[xx][yy] = EL_LEERRAUM;
-	    DrawLevelField(xx,yy);
+	    DrawLevelField(xx, yy);
 	  }
 	}
       }
@@ -1746,45 +2662,52 @@ void StartMoving(int x, int y)
 	return;
     }
 
-    if (element==EL_KAEFER || element==EL_BUTTERFLY)
+    if (element == EL_KAEFER || element == EL_BUTTERFLY)
     {
-      PlaySoundLevel(x,y,SND_KLAPPER);
+      PlaySoundLevel(x, y, SND_KLAPPER);
     }
-    else if (element==EL_FLIEGER || element==EL_FIREFLY)
+    else if (element == EL_FLIEGER || element == EL_FIREFLY)
     {
-      PlaySoundLevel(x,y,SND_ROEHR);
+      PlaySoundLevel(x, y, SND_ROEHR);
     }
 
-    /* neuer Schritt / Wartezustand beendet */
+    /* now make next step */
 
-    Moving2Blocked(x,y,&newx,&newy);	/* wohin soll's gehen? */
+    Moving2Blocked(x, y, &newx, &newy);	/* get next screen position */
 
-    if (IS_ENEMY(element) && IS_PLAYER(newx,newy))
+    if (IS_ENEMY(element) && IS_PLAYER(newx, newy) &&
+	!PLAYER_PROTECTED(newx, newy))
     {
-      /* Spieler erwischt */
+
+#if 1
+      TestIfBadThingHitsHero(x, y);
+      return;
+#else
+      /* enemy got the player */
       MovDir[x][y] = 0;
-      KillHero(PLAYERINFO(newx,newy));
+      KillHero(PLAYERINFO(newx, newy));
       return;
+#endif
+
     }
-    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)
+    else if ((element == EL_PINGUIN || element == EL_ROBOT ||
+	      element == EL_SONDE || element == EL_BALLOON) &&
+	     IN_LEV_FIELD(newx, newy) &&
+	     MovDir[x][y] == MV_DOWN && Feld[newx][newy] == EL_SALZSAEURE)
     {
-      Blurb(x,y);
+      Blurb(x, y);
       Store[x][y] = EL_SALZSAEURE;
     }
-    else if ((element == EL_MAULWURF || element == EL_PINGUIN) &&
-	     IN_LEV_FIELD(newx,newy))
+    else if (element == EL_PINGUIN && IN_LEV_FIELD(newx, newy))
     {
       if (Feld[newx][newy] == EL_AUSGANG_AUF)
       {
 	Feld[x][y] = EL_LEERRAUM;
-	DrawLevelField(x,y);
+	DrawLevelField(x, y);
 
-	PlaySoundLevel(newx,newy,SND_BUING);
-	if (IN_SCR_FIELD(SCREENX(newx),SCREENY(newy)))
-	  DrawGraphicThruMask(SCREENX(newx),SCREENY(newy),el2gfx(element));
+	PlaySoundLevel(newx, newy, SND_BUING);
+	if (IN_SCR_FIELD(SCREENX(newx), SCREENY(newy)))
+	  DrawGraphicThruMask(SCREENX(newx), SCREENY(newy), el2gfx(element));
 
 	local_player->friends_still_needed--;
 	if (!local_player->friends_still_needed &&
@@ -1795,209 +2718,274 @@ void StartMoving(int x, int y)
       }
       else if (IS_MAMPF3(Feld[newx][newy]))
       {
-	if (DigField(local_player, newx,newy, 0,0, DF_DIG) == MF_MOVING)
-	  DrawLevelField(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))
+      else if (!IS_FREE(newx, newy))
       {
-	if (IS_PLAYER(x,y))
-	  DrawPlayerField(x,y);
+	if (IS_PLAYER(x, y))
+	  DrawPlayerField(x, y);
 	else
-	  DrawLevelField(x,y);
+	  DrawLevelField(x, y);
 	return;
       }
     }
-    else if (element == EL_SCHWEIN && IN_LEV_FIELD(newx,newy))
+    else if (element == EL_SCHWEIN && IN_LEV_FIELD(newx, newy))
     {
       if (IS_GEM(Feld[newx][newy]))
       {
-	if (IS_MOVING(newx,newy))
-	  RemoveMovingField(newx,newy);
+	if (IS_MOVING(newx, newy))
+	  RemoveMovingField(newx, newy);
 	else
 	{
 	  Feld[newx][newy] = EL_LEERRAUM;
-	  DrawLevelField(newx,newy);
+	  DrawLevelField(newx, newy);
 	}
       }
-      else if (!IS_FREE(newx,newy))
+      else if (!IS_FREE(newx, newy))
       {
-	if (IS_PLAYER(x,y))
-	  DrawPlayerField(x,y);
+	if (IS_PLAYER(x, y))
+	  DrawPlayerField(x, y);
 	else
-	  DrawLevelField(x,y);
+	  DrawLevelField(x, y);
 	return;
       }
     }
-    else if (element==EL_DRACHE && IN_LEV_FIELD(newx,newy))
+    else if (element == EL_DRACHE && IN_LEV_FIELD(newx, newy))
     {
-      if (!IS_FREE(newx,newy))
+      if (!IS_FREE(newx, newy))
       {
-	if (IS_PLAYER(x,y))
-	  DrawPlayerField(x,y);
+	if (IS_PLAYER(x, y))
+	  DrawPlayerField(x, y);
 	else
-	  DrawLevelField(x,y);
+	  DrawLevelField(x, y);
 	return;
       }
       else
       {
-	BOOL wanna_flame = !RND(10);
+	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_BETON);
-	int element2 = (IN_LEV_FIELD(newx2,newy2) ?
-			MovingOrBlocked2Element(newx2,newy2) : EL_BETON);
+	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(x,y);
+	  if (IS_PLAYER(x, y))
+	    DrawPlayerField(x, y);
 	  else
-	    DrawLevelField(x,y);
+	    DrawLevelField(x, y);
 
 	  MovDelay[x][y] = 50;
 	  Feld[newx][newy] = EL_BURNING;
-	  if (IN_LEV_FIELD(newx1,newy1) && Feld[newx1][newy1] == EL_LEERRAUM)
+	  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)
+	  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)
+    else if (element == EL_MAMPFER && IN_LEV_FIELD(newx, newy) &&
+	     Feld[newx][newy] == EL_DIAMANT)
     {
-      if (IS_MOVING(newx,newy))
-	RemoveMovingField(newx,newy);
+      if (IS_MOVING(newx, newy))
+	RemoveMovingField(newx, newy);
       else
       {
 	Feld[newx][newy] = EL_LEERRAUM;
-	DrawLevelField(newx,newy);
+	DrawLevelField(newx, newy);
       }
     }
-    else if (element==EL_MAMPFER2 && IN_LEV_FIELD(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)
+	if (Feld[newx][newy] == EL_AMOEBE_VOLL ||
+	    Feld[newx][newy] == EL_AMOEBE_BD)
 	  AmoebaCnt[AmoebaNr[newx][newy]]--;
       }
 
-      if (IS_MOVING(newx,newy))
-	RemoveMovingField(newx,newy);
+      if (IS_MOVING(newx, newy))
+	RemoveMovingField(newx, newy);
       else
       {
 	Feld[newx][newy] = EL_LEERRAUM;
-	DrawLevelField(newx,newy);
+	DrawLevelField(newx, newy);
       }
     }
-    else if (element==EL_PACMAN && IN_LEV_FIELD(newx,newy) &&
-	     IS_AMOEBOID(Feld[newx][newy]))
+    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_AMOEBE_VOLL || Feld[newx][newy]==EL_AMOEBE_BD)
+	if (Feld[newx][newy] == EL_AMOEBE_VOLL ||
+	    Feld[newx][newy] == EL_AMOEBE_BD)
 	  AmoebaCnt[AmoebaNr[newx][newy]]--;
       }
 
-      Feld[newx][newy] = EL_LEERRAUM;
-      DrawLevelField(newx,newy);
+      if (element == EL_MOLE)
+      {
+	Feld[newx][newy] = EL_DEAMOEBING;
+	MovDelay[newx][newy] = 0;	/* start amoeba shrinking delay */
+	return;				/* wait for shrinking amoeba */
+      }
+      else	/* element == EL_PACMAN */
+      {
+	Feld[newx][newy] = EL_LEERRAUM;
+	DrawLevelField(newx, newy);
+      }
+    }
+    else if (element == EL_MOLE && IN_LEV_FIELD(newx, newy) &&
+	     (Feld[newx][newy] == EL_DEAMOEBING ||
+	      (Feld[newx][newy] == EL_LEERRAUM && Stop[newx][newy])))
+    {
+      /* wait for shrinking amoeba to completely disappear */
+      return;
     }
-    else if (!IN_LEV_FIELD(newx,newy) || !IS_FREE(newx,newy))
-    {					/* gegen Wand gelaufen */
-      TurnRound(x,y);
+    else if (!IN_LEV_FIELD(newx, newy) || !IS_FREE(newx, newy))
+    {
+      /* object was running against a wall */
+
+      TurnRound(x, y);
 
-      if (element == EL_KAEFER || element == EL_FLIEGER)
-	DrawLevelField(x,y);
+      if (element == EL_KAEFER || element == EL_FLIEGER ||
+	  element == EL_SP_SNIKSNAK || element == EL_MOLE)
+	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)
-	DrawGraphicAnimation(x,y, GFX_SONDE_START, 8, 2, ANIM_NORMAL);
+	DrawGraphicAnimation(x, y, el2gfx(element), 2, 4, ANIM_NORMAL);
+      else if (element == EL_SONDE)
+	DrawGraphicAnimation(x, y, GFX_SONDE_START, 8, 2, ANIM_NORMAL);
+      else if (element == EL_SP_ELECTRON)
+	DrawGraphicAnimation(x, y, GFX2_SP_ELECTRON, 8, 2, ANIM_NORMAL);
+
+      if (DONT_TOUCH(element))
+	TestIfBadThingHitsHero(x, y);
 
       return;
     }
 
-    if (element==EL_ROBOT && IN_SCR_FIELD(x,y))
-      PlaySoundLevel(x,y,SND_SCHLURF);
+    if (element == EL_ROBOT && IN_SCR_FIELD(x, y))
+      PlaySoundLevel(x, y, SND_SCHLURF);
 
-    InitMovingField(x,y,MovDir[x][y]);
+    InitMovingField(x, y, MovDir[x][y]);
   }
 
   if (MovDir[x][y])
-    ContinueMoving(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 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;
+  int step = (horiz_move ? dx : dy) * TILEX / 8;
+
+  if (element == EL_TROPFEN)
+    step /= 2;
+  else if (Store[x][y] == EL_MORAST_VOLL || Store[x][y] == EL_MORAST_LEER)
+    step /= 4;
+  else if (CAN_FALL(element) && horiz_move &&
+	   y < lev_fieldy-1 && IS_BELT(Feld[x][y+1]))
+    step /= 2;
+  else if (element == EL_SPRING_MOVING)
+    step*=2;
 
-  if (CAN_FALL(element) && horiz_move)
+#if OLD_GAME_BEHAVIOUR
+  else if (CAN_FALL(element) && horiz_move && !IS_SP_ELEMENT(element))
     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;
+#endif
 
   MovPos[x][y] += step;
 
-  if (ABS(MovPos[x][y])>=TILEX)		/* Zielfeld erreicht */
+  if (ABS(MovPos[x][y])>=TILEX)		/* object reached its destination */
   {
     Feld[x][y] = EL_LEERRAUM;
     Feld[newx][newy] = element;
 
-    if (Store[x][y]==EL_MORAST_VOLL)
+    if (element == EL_MOLE)
+    {
+      int i;
+      static int xy[4][2] =
+      {
+	{ 0, -1 },
+	{ -1, 0 },
+	{ +1, 0 },
+	{ 0, +1 }
+      };
+
+      Feld[x][y] = EL_ERDREICH;
+      DrawLevelField(x, y);
+
+      for(i=0; i<4; i++)
+      {
+	int xx, yy;
+
+	xx = x + xy[i][0];
+	yy = y + xy[i][1];
+
+	if (IN_LEV_FIELD(xx, yy) && Feld[xx][yy] == EL_ERDREICH)
+	  DrawLevelField(xx, yy);	/* for "ErdreichAnbroeckeln()" */
+      }
+    }
+
+    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)
+    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)
+    else if (Store[x][y] == EL_MAGIC_WALL_FULL)
     {
       Store[x][y] = 0;
-      element = Feld[newx][newy] = (SiebAktiv ? EL_SIEB_VOLL : EL_SIEB_TOT);
+      element = Feld[newx][newy] =
+	(game.magic_wall_active ? EL_MAGIC_WALL_FULL : EL_MAGIC_WALL_DEAD);
     }
-    else if (Store[x][y]==EL_SIEB_LEER)
+    else if (Store[x][y] == EL_MAGIC_WALL_EMPTY)
     {
       Store[x][y] = Store2[x][y] = 0;
-      Feld[x][y] = (SiebAktiv ? EL_SIEB_LEER : EL_SIEB_TOT);
+      Feld[x][y] = (game.magic_wall_active ? EL_MAGIC_WALL_EMPTY :
+		    EL_MAGIC_WALL_DEAD);
     }
-    else if (Store[x][y]==EL_SIEB2_VOLL)
+    else if (Store[x][y] == EL_MAGIC_WALL_BD_FULL)
     {
       Store[x][y] = 0;
-      element = Feld[newx][newy] = (SiebAktiv ? EL_SIEB2_VOLL : EL_SIEB2_TOT);
+      element = Feld[newx][newy] =
+	(game.magic_wall_active ? EL_MAGIC_WALL_BD_FULL :
+	 EL_MAGIC_WALL_BD_DEAD);
     }
-    else if (Store[x][y]==EL_SIEB2_LEER)
+    else if (Store[x][y] == EL_MAGIC_WALL_BD_EMPTY)
     {
       Store[x][y] = Store2[x][y] = 0;
-      Feld[x][y] = (SiebAktiv ? EL_SIEB2_LEER : EL_SIEB2_TOT);
+      Feld[x][y] = (game.magic_wall_active ? EL_MAGIC_WALL_BD_EMPTY :
+		    EL_MAGIC_WALL_BD_DEAD);
     }
-    else if (Store[x][y]==EL_SALZSAEURE)
+    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)
+    else if (Store[x][y] == EL_AMOEBE_NASS)
     {
       Store[x][y] = 0;
       Feld[x][y] = EL_AMOEBE_NASS;
@@ -2009,27 +2997,27 @@ void ContinueMoving(int x, int y)
     if (!CAN_MOVE(element))
       MovDir[newx][newy] = 0;
 
-    DrawLevelField(x,y);
-    DrawLevelField(newx,newy);
+    DrawLevelField(x, y);
+    DrawLevelField(newx, newy);
 
     Stop[newx][newy] = TRUE;
-    JustHit[x][newy] = 3;
+    JustStopped[newx][newy] = 3;
 
-    if (DONT_TOUCH(element))	/* Käfer oder Flieger */
+    if (DONT_TOUCH(element))	/* object may be nasty to player or others */
     {
-      TestIfBadThingHitsHero(newx,newy);
-      TestIfBadThingHitsFriend(newx,newy);
-      TestIfBadThingHitsOtherBadThing(newx,newy);
+      TestIfBadThingHitsHero(newx, newy);
+      TestIfBadThingHitsFriend(newx, newy);
+      TestIfBadThingHitsOtherBadThing(newx, newy);
     }
     else if (element == EL_PINGUIN)
-      TestIfFriendHitsBadThing(newx,newy);
+      TestIfFriendHitsBadThing(newx, newy);
 
-    if (CAN_SMASH(element) && direction==MV_DOWN &&
-	(newy==lev_fieldy-1 || !IS_FREE(x,newy+1)))
-      Impact(x,newy);
+    if (CAN_SMASH(element) && direction == MV_DOWN &&
+	(newy == lev_fieldy-1 || !IS_FREE(x, newy+1)))
+      Impact(x, newy);
   }
-  else				/* noch in Bewegung */
-    DrawLevelField(x,y);
+  else				/* still moving on */
+    DrawLevelField(x, y);
 }
 
 int AmoebeNachbarNr(int ax, int ay)
@@ -2039,160 +3027,230 @@ int AmoebeNachbarNr(int ax, int ay)
   int group_nr = 0;
   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++)
   {
-    int x = ax+xy[i%4][0];
-    int y = ay+xy[i%4][1];
+    int x = ax + xy[i][0];
+    int y = ay + xy[i][1];
 
-    if (!IN_LEV_FIELD(x,y))
+    if (!IN_LEV_FIELD(x, y))
       continue;
 
-    if (Feld[x][y]==element && AmoebaNr[x][y]>0)
+    if (Feld[x][y] == element && AmoebaNr[x][y] > 0)
       group_nr = AmoebaNr[x][y];
   }
 
-  return(group_nr);
+  return group_nr;
 }
 
 void AmoebenVereinigen(int ax, int ay)
 {
-  int i,x,y,xx,yy;
+  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 }
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
   };
 
-  if (!new_group_nr)
+  if (new_group_nr == 0)
     return;
 
-  for(i=0;i<4;i++)
+  for (i=0; i<4; i++)
   {
-    x = ax+xy[i%4][0];
-    y = ay+xy[i%4][1];
+    x = ax + xy[i][0];
+    y = ay + xy[i][1];
 
-    if (!IN_LEV_FIELD(x,y))
+    if (!IN_LEV_FIELD(x, y))
       continue;
 
-    if ((Feld[x][y]==EL_AMOEBE_VOLL ||
-	 Feld[x][y]==EL_AMOEBE_BD ||
-	 Feld[x][y]==EL_AMOEBE_TOT) &&
+    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];
 
+      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;
+      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;
-  int group_nr = AmoebaNr[ax][ay];
-  static int xy[4][2] =
-  {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
-  };
+  int i, x, y;
 
-  if (Feld[ax][ay]==EL_AMOEBE_TOT)
+  if (Feld[ax][ay] == EL_AMOEBE_TOT)
   {
-    for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
+    int group_nr = AmoebaNr[ax][ay];
+
+#ifdef DEBUG
+    if (group_nr == 0)
     {
-      if (Feld[x][y]==EL_AMOEBE_TOT && AmoebaNr[x][y]==group_nr)
+      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++)
       {
-	AmoebaNr[x][y] = 0;
-	Feld[x][y] = EL_AMOEBA2DIAM;
+	if (Feld[x][y] == EL_AMOEBE_TOT && AmoebaNr[x][y] == group_nr)
+	{
+	  AmoebaNr[x][y] = 0;
+	  Feld[x][y] = EL_AMOEBA2DIAM;
+	}
       }
     }
-    Bang(ax,ay);
+    Bang(ax, ay);
   }
   else
   {
-    for(i=0;i<4;i++)
+    static int xy[4][2] =
     {
-      x = ax+xy[i%4][0];
-      y = ay+xy[i%4][1];
+      { 0, -1 },
+      { -1, 0 },
+      { +1, 0 },
+      { 0, +1 }
+    };
 
-      if (!IN_LEV_FIELD(x,y))
+    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_AMOEBA2DIAM)
-	Bang(x,y);
+      if (Feld[x][y] == EL_AMOEBA2DIAM)
+	Bang(x, y);
     }
   }
 }
 
-void AmoebeUmwandeln2(int ax, int ay, int new_element)
+void AmoebeUmwandelnBD(int ax, int ay, int new_element)
 {
-  int x,y;
+  int x, y;
   int group_nr = AmoebaNr[ax][ay];
-  BOOL done = FALSE;
+  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++)
+  for (y=0; y<lev_fieldy; y++)
   {
-    if (AmoebaNr[x][y]==group_nr &&
-	(Feld[x][y]==EL_AMOEBE_TOT ||
-	 Feld[x][y]==EL_AMOEBE_BD ||
-	 Feld[x][y]==EL_AMOEBING))
+    for (x=0; x<lev_fieldx; x++)
     {
-      AmoebaNr[x][y] = 0;
-      Feld[x][y] = new_element;
-      DrawLevelField(x,y);
-      done = TRUE;
+      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;
+	InitField(x, y, FALSE);
+	DrawLevelField(x, y);
+	done = TRUE;
+      }
     }
   }
 
   if (done)
-    PlaySoundLevel(ax,ay,new_element==EL_FELSBROCKEN ? SND_KLOPF : SND_PLING);
+    PlaySoundLevel(ax, ay,
+		   (new_element == EL_BD_ROCK ? SND_KLOPF : SND_PLING));
 }
 
 void AmoebeWaechst(int x, int y)
 {
-  static long sound_delay = 0;
-  static int sound_delay_value = 0;
+  static unsigned long sound_delay = 0;
+  static unsigned long sound_delay_value = 0;
 
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
+  if (!MovDelay[x][y])		/* start new growing cycle */
   {
     MovDelay[x][y] = 7;
 
     if (DelayReached(&sound_delay, sound_delay_value))
     {
-      PlaySoundLevel(x,y,SND_AMOEBE);
+      PlaySoundLevel(x, y, SND_AMOEBE);
       sound_delay_value = 30;
     }
   }
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  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)))
-      DrawGraphic(SCREENX(x),SCREENY(y),GFX_AMOEBING+3-MovDelay[x][y]/2);
+    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_AMOEBING + 3 - MovDelay[x][y]/2);
 
     if (!MovDelay[x][y])
     {
       Feld[x][y] = Store[x][y];
       Store[x][y] = 0;
-      DrawLevelField(x,y);
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void AmoebeSchrumpft(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))
+    {
+      PlaySoundLevel(x, y, SND_BLURB);
+      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)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_AMOEBING + MovDelay[x][y]/2);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_LEERRAUM;
+      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;
     }
   }
 }
@@ -2204,187 +3262,201 @@ void AmoebeAbleger(int ax, int ay)
   int newax = ax, neway = ay;
   static int xy[4][2] =
   {
-    { 0,-1 },
-    { -1,0 },
-    { +1,0 },
-    { 0,+1 }
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
   };
 
-  if (!level.tempo_amoebe)
+  if (!level.amoeba_speed)
   {
     Feld[ax][ay] = EL_AMOEBE_TOT;
-    DrawLevelField(ax,ay);
+    DrawLevelField(ax, ay);
     return;
   }
 
-  if (!MovDelay[ax][ay])	/* neue Amoebe / noch nicht gewartet */
-    MovDelay[ax][ay] = RND(FRAMES_PER_SECOND * 25/(1+level.tempo_amoebe));
+  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])		/* neue Amoebe / in Wartezustand */
+  if (MovDelay[ax][ay])		/* wait some time before making new amoeba */
   {
     MovDelay[ax][ay]--;
     if (MovDelay[ax][ay])
       return;
   }
 
-  if (element==EL_AMOEBE_NASS)	/* tropfende Amöbe */
+  if (element == EL_AMOEBE_NASS)	/* object is an acid / amoeba drop */
   {
     int start = RND(4);
-    int x = ax+xy[start][0];
-    int y = ay+xy[start][1];
+    int x = ax + xy[start][0];
+    int y = ay + xy[start][1];
 
-    if (!IN_LEV_FIELD(x,y))
+    if (!IN_LEV_FIELD(x, y))
       return;
 
-    if (IS_FREE(x,y) ||
-	Feld[x][y]==EL_ERDREICH || Feld[x][y]==EL_MORAST_LEER)
+    if (IS_FREE(x, y) ||
+	Feld[x][y] == EL_ERDREICH || Feld[x][y] == EL_MORAST_LEER)
     {
       newax = x;
       neway = y;
     }
 
-    if (newax==ax && neway==ay)
+    if (newax == ax && neway == ay)
       return;
   }
-  else				/* normale oder "gefüllte" Amöbe */
+  else				/* normal or "filled" (BD style) amoeba */
   {
     int start = RND(4);
-    BOOL waiting_for_player = FALSE;
+    boolean waiting_for_player = FALSE;
 
-    for(i=0;i<4;i++)
+    for (i=0; i<4; i++)
     {
-      int j = (start+i)%4;
-      int x = ax+xy[j][0];
-      int y = ay+xy[j][1];
+      int j = (start + i) % 4;
+      int x = ax + xy[j][0];
+      int y = ay + xy[j][1];
 
-      if (!IN_LEV_FIELD(x,y))
+      if (!IN_LEV_FIELD(x, y))
 	continue;
 
-      if (IS_FREE(x,y) ||
-	  Feld[x][y]==EL_ERDREICH || Feld[x][y]==EL_MORAST_LEER)
+      if (IS_FREE(x, y) ||
+	  Feld[x][y] == EL_ERDREICH || Feld[x][y] == EL_MORAST_LEER)
       {
 	newax = x;
 	neway = y;
 	break;
       }
-      else if (IS_PLAYER(x,y))
+      else if (IS_PLAYER(x, y))
 	waiting_for_player = TRUE;
     }
 
-    if (newax==ax && neway==ay)
+    if (newax == ax && neway == ay)		/* amoeba cannot grow */
     {
-      if (i==4 && !waiting_for_player)
+      if (i == 4 && (!waiting_for_player || game.emulation == EMU_BOULDERDASH))
       {
 	Feld[ax][ay] = EL_AMOEBE_TOT;
-	DrawLevelField(ax,ay);
+	DrawLevelField(ax, ay);
 	AmoebaCnt[AmoebaNr[ax][ay]]--;
 
-	if (AmoebaCnt[AmoebaNr[ax][ay]]<=0)	/* Amöbe vollständig tot */
+	if (AmoebaCnt[AmoebaNr[ax][ay]] <= 0)	/* amoeba is completely dead */
 	{
-	  if (element==EL_AMOEBE_VOLL)
-	    AmoebeUmwandeln(ax,ay);
-	  else if (element==EL_AMOEBE_BD)
-	    AmoebeUmwandeln2(ax,ay,level.amoebe_inhalt);
+	  if (element == EL_AMOEBE_VOLL)
+	    AmoebeUmwandeln(ax, ay);
+	  else if (element == EL_AMOEBE_BD)
+	    AmoebeUmwandelnBD(ax, ay, level.amoeba_content);
 	}
       }
       return;
     }
-    else if (element==EL_AMOEBE_VOLL || element==EL_AMOEBE_BD)
+    else if (element == EL_AMOEBE_VOLL || element == EL_AMOEBE_BD)
     {
+      /* 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]++;
-      AmoebenVereinigen(newax,neway);
 
-      if (AmoebaCnt2[new_group_nr] >= 200 && element==EL_AMOEBE_BD)
+      /* if amoeba touches other amoeba(s) after growing, unify them */
+      AmoebenVereinigen(newax, neway);
+
+      if (element == EL_AMOEBE_BD && AmoebaCnt2[new_group_nr] >= 200)
       {
-	AmoebeUmwandeln2(newax,neway,EL_FELSBROCKEN);
+	AmoebeUmwandelnBD(newax, neway, EL_BD_ROCK);
 	return;
       }
     }
   }
 
-  if (element!=EL_AMOEBE_NASS || neway<ay || !IS_FREE(newax,neway) ||
-      (neway==lev_fieldy-1 && newax!=ax))
+  if (element != EL_AMOEBE_NASS || neway < ay || !IS_FREE(newax, neway) ||
+      (neway == lev_fieldy - 1 && newax != ax))
   {
     Feld[newax][neway] = EL_AMOEBING;
     Store[newax][neway] = element;
   }
-  else if (neway==ay)
+  else if (neway == ay)
     Feld[newax][neway] = EL_TROPFEN;
   else
   {
-    InitMovingField(ax,ay,MV_DOWN);
+    InitMovingField(ax, ay, MV_DOWN);
     Feld[ax][ay] = EL_TROPFEN;
     Store[ax][ay] = EL_AMOEBE_NASS;
-    ContinueMoving(ax,ay);
+    ContinueMoving(ax, ay);
     return;
   }
 
-  DrawLevelField(newax,neway);
+  DrawLevelField(newax, neway);
 }
 
 void Life(int ax, int ay)
 {
-  int x1,y1,x2,y2;
-  static int life[4] = { 2,3,3,3 };	/* "Life"-Parameter */
+  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];
 
   if (Stop[ax][ay])
     return;
 
-  if (!MovDelay[ax][ay])	/* neue Phase / noch nicht gewartet */
+  if (!MovDelay[ax][ay])	/* start new "game of life" cycle */
     MovDelay[ax][ay] = life_time;
 
-  if (MovDelay[ax][ay])		/* neue Phase / in Wartezustand */
+  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++)
+  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))
+    if (!IN_LEV_FIELD(xx, yy))
       continue;
 
-    for(y2=-1;y2<2;y2++) for(x2=-1;x2<2;x2++)
+    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))
+      if (!IN_LEV_FIELD(x, y) || (x == xx && y == yy))
 	continue;
 
-      if (((Feld[x][y]==element || (element==EL_LIFE && IS_PLAYER(x,y))) &&
+      if (((Feld[x][y] == element ||
+	    (element == EL_LIFE && IS_PLAYER(x, y))) &&
 	   !Stop[x][y]) ||
-	  (IS_FREE(x,y) && Stop[x][y]))
+	  (IS_FREE(x, y) && Stop[x][y]))
 	nachbarn++;
     }
 
-    if (xx==ax && yy==ay)		/* mittleres Feld mit Amoebe */
+    if (xx == ax && yy == ay)		/* field in the middle */
     {
       if (nachbarn<life[0] || nachbarn>life[1])
       {
 	Feld[xx][yy] = EL_LEERRAUM;
 	if (!Stop[xx][yy])
-	  DrawLevelField(xx,yy);
+	  DrawLevelField(xx, yy);
 	Stop[xx][yy] = TRUE;
       }
     }
-    else if (IS_FREE(xx,yy) || Feld[xx][yy]==EL_ERDREICH)
-    {					/* Randfeld ohne Amoebe */
+    else if (IS_FREE(xx, yy) || Feld[xx][yy] == EL_ERDREICH)
+    {					/* free border field */
       if (nachbarn>=life[2] && nachbarn<=life[3])
       {
 	Feld[xx][yy] = element;
-	MovDelay[xx][yy] = (element==EL_LIFE ? 0 : life_time-1);
+	MovDelay[xx][yy] = (element == EL_LIFE ? 0 : life_time-1);
 	if (!Stop[xx][yy])
-	  DrawLevelField(xx,yy);
+	  DrawLevelField(xx, yy);
 	Stop[xx][yy] = TRUE;
       }
     }
@@ -2393,34 +3465,59 @@ void Life(int ax, int ay)
 
 void Ablenk(int x, int y)
 {
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
-    MovDelay[x][y] = level.dauer_ablenk * FRAMES_PER_SECOND;
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = level.time_wheel * FRAMES_PER_SECOND;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  if (MovDelay[x][y])		/* wait some time before next frame */
   {
     MovDelay[x][y]--;
     if (MovDelay[x][y])
     {
-      if (IN_SCR_FIELD(SCREENX(x),SCREENY(y)))
-	DrawGraphic(SCREENX(x),SCREENY(y),GFX_ABLENK+MovDelay[x][y]%4);
+      if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+	DrawGraphic(SCREENX(x), SCREENY(y), GFX_ABLENK+MovDelay[x][y]%4);
       if (!(MovDelay[x][y]%4))
-	PlaySoundLevel(x,y,SND_MIEP);
+	PlaySoundLevel(x, y, SND_MIEP);
       return;
     }
   }
 
   Feld[x][y] = EL_ABLENK_AUS;
-  DrawLevelField(x,y);
-  if (ZX==x && ZY==y)
+  DrawLevelField(x, y);
+  if (ZX == x && ZY == y)
+    ZX = ZY = -1;
+}
+
+void TimegateWheel(int x, int y)
+{
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = level.time_wheel * FRAMES_PER_SECOND;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    MovDelay[x][y]--;
+    if (MovDelay[x][y])
+    {
+      if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+	DrawGraphic(SCREENX(x), SCREENY(y),
+		    GFX_TIMEGATE_SWITCH + MovDelay[x][y]%4);
+      if (!(MovDelay[x][y]%4))
+	PlaySoundLevel(x, y, SND_MIEP);
+      return;
+    }
+  }
+
+  Feld[x][y] = EL_TIMEGATE_SWITCH_OFF;
+  DrawLevelField(x, y);
+  if (ZX == x && ZY == y)
     ZX = ZY = -1;
 }
 
 void Birne(int x, int y)
 {
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
+  if (!MovDelay[x][y])		/* next animation frame */
     MovDelay[x][y] = 800;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  if (MovDelay[x][y])		/* wait some time before next frame */
   {
     MovDelay[x][y]--;
     if (MovDelay[x][y])
@@ -2431,7 +3528,7 @@ void Birne(int x, int y)
 	  Feld[x][y]=EL_ABLENK_EIN;
 	else
 	  Feld[x][y]=EL_ABLENK_AUS;
-	DrawLevelField(x,y);
+	DrawLevelField(x, y);
 	Feld[x][y]=EL_ABLENK_EIN;
       }
       return;
@@ -2439,43 +3536,64 @@ void Birne(int x, int y)
   }
 
   Feld[x][y]=EL_ABLENK_AUS;
-  DrawLevelField(x,y);
-  if (ZX==x && ZY==y)
+  DrawLevelField(x, y);
+  if (ZX == x && ZY == y)
     ZX=ZY=-1;
 }
 
 void Blubber(int x, int y)
 {
-  if (y > 0 && IS_MOVING(x,y-1) && MovDir[x][y-1] == MV_DOWN)
-    DrawLevelField(x,y-1);
+  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);
+    DrawGraphicAnimation(x, y, GFX_GEBLUBBER, 4, 10, ANIM_NORMAL);
 }
 
 void NussKnacken(int x, int y)
 {
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
+  if (!MovDelay[x][y])		/* next animation frame */
     MovDelay[x][y] = 7;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  if (MovDelay[x][y])		/* wait some time before next frame */
   {
     MovDelay[x][y]--;
-    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x),SCREENY(y)))
-      DrawGraphic(SCREENX(x),SCREENY(y),GFX_CRACKINGNUT+3-MovDelay[x][y]/2);
+    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y),
+		  GFX_CRACKINGNUT + 3 - MovDelay[x][y]/2);
 
     if (!MovDelay[x][y])
     {
       Feld[x][y] = EL_EDELSTEIN;
-      DrawLevelField(x,y);
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void BreakingPearl(int x, int y)
+{
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 9;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    MovDelay[x][y]--;
+    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y),
+		  GFX_PEARL_BREAKING + 4 - MovDelay[x][y]/2);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_LEERRAUM;
+      DrawLevelField(x, y);
     }
   }
 }
 
 void SiebAktivieren(int x, int y, int typ)
 {
-  if (!(SiebAktiv % 4) && IN_SCR_FIELD(SCREENX(x),SCREENY(y)))
-    DrawGraphic(SCREENX(x),SCREENY(y),
-		(typ==1 ? GFX_SIEB_VOLL : GFX_SIEB2_VOLL)+3-(SiebAktiv%16)/4);
+  int graphic = (typ == 1 ? GFX_MAGIC_WALL_FULL : GFX_MAGIC_WALL_BD_FULL) + 3;
+
+  DrawGraphicAnimation(x, y, graphic, 4, 4, ANIM_REVERSE);
 }
 
 void AusgangstuerPruefen(int x, int y)
@@ -2498,51 +3616,166 @@ void AusgangstuerOeffnen(int x, int y)
 {
   int delay = 6;
 
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
+  if (!MovDelay[x][y])		/* next animation frame */
     MovDelay[x][y] = 5*delay;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  if (MovDelay[x][y])		/* wait some time before next frame */
   {
     int tuer;
 
     MovDelay[x][y]--;
-    tuer = MovDelay[x][y]/delay;
-    if (!(MovDelay[x][y]%delay) && IN_SCR_FIELD(SCREENX(x),SCREENY(y)))
-      DrawGraphic(SCREENX(x),SCREENY(y),GFX_AUSGANG_AUF-tuer);
+    tuer = MovDelay[x][y]/delay;
+    if (!(MovDelay[x][y]%delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_AUSGANG_AUF-tuer);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_AUSGANG_AUF;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void AusgangstuerBlinken(int x, int y)
+{
+  DrawGraphicAnimation(x, y, GFX_AUSGANG_AUF, 4, 4, ANIM_OSCILLATE);
+}
+
+void OpenSwitchgate(int x, int y)
+{
+  int delay = 6;
+
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 5 * delay;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    int phase;
+
+    MovDelay[x][y]--;
+    phase = MovDelay[x][y] / delay;
+    if (!(MovDelay[x][y] % delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_SWITCHGATE_OPEN - phase);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_SWITCHGATE_OPEN;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void CloseSwitchgate(int x, int y)
+{
+  int delay = 6;
+
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 5 * delay;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    int phase;
+
+    MovDelay[x][y]--;
+    phase = MovDelay[x][y] / delay;
+    if (!(MovDelay[x][y] % delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_SWITCHGATE_CLOSED + phase);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_SWITCHGATE_CLOSED;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void OpenTimegate(int x, int y)
+{
+  int delay = 6;
+
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 5 * delay;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    int phase;
+
+    MovDelay[x][y]--;
+    phase = MovDelay[x][y] / delay;
+    if (!(MovDelay[x][y] % delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_TIMEGATE_OPEN - phase);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_TIMEGATE_OPEN;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void CloseTimegate(int x, int y)
+{
+  int delay = 6;
+
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 5 * delay;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    int phase;
+
+    MovDelay[x][y]--;
+    phase = MovDelay[x][y] / delay;
+    if (!(MovDelay[x][y] % delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_TIMEGATE_CLOSED + phase);
 
     if (!MovDelay[x][y])
     {
-      Feld[x][y] = EL_AUSGANG_AUF;
-      DrawLevelField(x,y);
+      Feld[x][y] = EL_TIMEGATE_CLOSED;
+      DrawLevelField(x, y);
     }
   }
 }
 
-void AusgangstuerBlinken(int x, int y)
+static void CloseAllOpenTimegates()
 {
-  DrawGraphicAnimation(x,y, GFX_AUSGANG_AUF, 4, 4, ANIM_OSCILLATE);
+  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_TIMEGATE_OPEN || element == EL_TIMEGATE_OPENING)
+      {
+	Feld[x][y] = EL_TIMEGATE_CLOSING;
+	PlaySoundLevel(x, y, SND_OEFFNEN);
+      }
+    }
+  }
 }
 
 void EdelsteinFunkeln(int x, int y)
 {
-  if (!IN_SCR_FIELD(SCREENX(x),SCREENY(y)) || IS_MOVING(x,y))
+  if (!IN_SCR_FIELD(SCREENX(x), SCREENY(y)) || IS_MOVING(x, y))
     return;
 
   if (Feld[x][y] == EL_EDELSTEIN_BD)
-    DrawGraphicAnimation(x,y, GFX_EDELSTEIN_BD, 4, 4, ANIM_REVERSE);
+    DrawGraphicAnimation(x, y, GFX_EDELSTEIN_BD, 4, 4, ANIM_REVERSE);
   else
   {
-    if (!MovDelay[x][y])	/* neue Phase / noch nicht gewartet */
+    if (!MovDelay[x][y])	/* next animation frame */
       MovDelay[x][y] = 11 * !SimpleRND(500);
 
-    if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+    if (MovDelay[x][y])		/* wait some time before next frame */
     {
       MovDelay[x][y]--;
 
-      if (direct_draw_on && MovDelay[x][y])
+      if (setup.direct_draw && MovDelay[x][y])
 	SetDrawtoField(DRAW_BUFFERED);
 
-      DrawGraphic(SCREENX(x),SCREENY(y), el2gfx(Feld[x][y]));
+      DrawGraphic(SCREENX(x), SCREENY(y), el2gfx(Feld[x][y]));
 
       if (MovDelay[x][y])
       {
@@ -2551,17 +3784,17 @@ void EdelsteinFunkeln(int x, int y)
 	if (phase > 2)
 	  phase = 4-phase;
 
-	DrawGraphicThruMask(SCREENX(x),SCREENY(y), GFX_FUNKELN_WEISS + phase);
+	DrawGraphicThruMask(SCREENX(x), SCREENY(y), GFX_FUNKELN_WEISS + phase);
 
-	if (direct_draw_on)
+	if (setup.direct_draw)
 	{
-	  int dest_x,dest_y;
+	  int dest_x, dest_y;
 
 	  dest_x = FX + SCREENX(x)*TILEX;
 	  dest_y = FY + SCREENY(y)*TILEY;
 
-	  XCopyArea(display,drawto_field,window,gc,
-		    dest_x,dest_y, TILEX,TILEY, dest_x,dest_y);
+	  XCopyArea(display, drawto_field, window, gc,
+		    dest_x, dest_y, TILEX, TILEY, dest_x, dest_y);
 	  SetDrawtoField(DRAW_DIRECT);
 	}
       }
@@ -2573,105 +3806,159 @@ void MauerWaechst(int x, int y)
 {
   int delay = 6;
 
-  if (!MovDelay[x][y])		/* neue Phase / noch nicht gewartet */
+  if (!MovDelay[x][y])		/* next animation frame */
     MovDelay[x][y] = 3*delay;
 
-  if (MovDelay[x][y])		/* neue Phase / in Wartezustand */
+  if (MovDelay[x][y])		/* wait some time before next frame */
   {
     int phase;
 
     MovDelay[x][y]--;
     phase = 2-MovDelay[x][y]/delay;
-    if (!(MovDelay[x][y]%delay) && IN_SCR_FIELD(SCREENX(x),SCREENY(y)))
-      DrawGraphic(SCREENX(x),SCREENY(y),
-		  (Store[x][y]==MV_LEFT ? GFX_MAUER_L1 : GFX_MAUER_R1)+phase);
+    if (!(MovDelay[x][y]%delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y),
+		  (MovDir[x][y] == MV_LEFT  ? GFX_MAUER_LEFT  :
+		   MovDir[x][y] == MV_RIGHT ? GFX_MAUER_RIGHT :
+		   MovDir[x][y] == MV_UP    ? GFX_MAUER_UP    :
+		                              GFX_MAUER_DOWN  ) + phase);
 
     if (!MovDelay[x][y])
     {
-      if (Store[x][y]==MV_LEFT)
+      if (MovDir[x][y] == MV_LEFT)
+      {
+	if (IN_LEV_FIELD(x-1, y) && IS_MAUER(Feld[x-1][y]))
+	  DrawLevelField(x-1, y);
+      }
+      else if (MovDir[x][y] == MV_RIGHT)
+      {
+	if (IN_LEV_FIELD(x+1, y) && IS_MAUER(Feld[x+1][y]))
+	  DrawLevelField(x+1, y);
+      }
+      else if (MovDir[x][y] == MV_UP)
       {
-	if (IN_LEV_FIELD(x-1,y) && IS_MAUER(Feld[x-1][y]))
-	  DrawLevelField(x-1,y);
+	if (IN_LEV_FIELD(x, y-1) && IS_MAUER(Feld[x][y-1]))
+	  DrawLevelField(x, y-1);
       }
       else
       {
-	if (IN_LEV_FIELD(x+1,y) && IS_MAUER(Feld[x+1][y]))
-	  DrawLevelField(x+1,y);
+	if (IN_LEV_FIELD(x, y+1) && IS_MAUER(Feld[x][y+1]))
+	  DrawLevelField(x, y+1);
       }
 
-      Feld[x][y] = EL_MAUER_LEBT;
+      Feld[x][y] = Store[x][y];
       Store[x][y] = 0;
-      DrawLevelField(x,y);
+      MovDir[x][y] = MV_NO_MOVING;
+      DrawLevelField(x, y);
     }
   }
 }
 
 void MauerAbleger(int ax, int ay)
 {
-  BOOL links_frei = FALSE, rechts_frei = FALSE;
-  BOOL links_massiv = FALSE, rechts_massiv = FALSE;
+  int element = Feld[ax][ay];
+  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;
 
-  if (!MovDelay[ax][ay])	/* neue Mauer / noch nicht gewartet */
+  if (!MovDelay[ax][ay])	/* start building new wall */
     MovDelay[ax][ay] = 6;
 
-  if (MovDelay[ax][ay])		/* neue Mauer / in Wartezustand */
+  if (MovDelay[ax][ay])		/* wait some time before building new wall */
   {
     MovDelay[ax][ay]--;
     if (MovDelay[ax][ay])
       return;
   }
 
-  if (IN_LEV_FIELD(ax-1,ay) && IS_FREE(ax-1,ay))
+  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))
+  if (IN_LEV_FIELD(ax+1, ay) && IS_FREE(ax+1, ay))
     rechts_frei = TRUE;
 
-  if (links_frei)
+  if (element == EL_MAUER_Y || element == EL_MAUER_XY)
   {
-    Feld[ax-1][ay] = EL_MAUERND;
-    Store[ax-1][ay] = MV_LEFT;
-    if (IN_SCR_FIELD(SCREENX(ax-1),SCREENY(ay)))
-      DrawGraphic(SCREENX(ax-1),SCREENY(ay),GFX_MAUER_L1);
+    if (oben_frei)
+    {
+      Feld[ax][ay-1] = EL_MAUERND;
+      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), GFX_MAUER_UP);
+    }
+    if (unten_frei)
+    {
+      Feld[ax][ay+1] = EL_MAUERND;
+      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), GFX_MAUER_DOWN);
+    }
   }
-  if (rechts_frei)
+
+  if (element == EL_MAUER_X || element == EL_MAUER_XY ||
+      element == EL_MAUER_LEBT)
   {
-    Feld[ax+1][ay] = EL_MAUERND;
-    Store[ax+1][ay] = MV_RIGHT;
-    if (IN_SCR_FIELD(SCREENX(ax+1),SCREENY(ay)))
-      DrawGraphic(SCREENX(ax+1),SCREENY(ay),GFX_MAUER_R1);
+    if (links_frei)
+    {
+      Feld[ax-1][ay] = EL_MAUERND;
+      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), GFX_MAUER_LEFT);
+    }
+    if (rechts_frei)
+    {
+      Feld[ax+1][ay] = EL_MAUERND;
+      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), GFX_MAUER_RIGHT);
+    }
   }
 
-  if (links_frei || rechts_frei)
-    DrawLevelField(ax,ay);
+  if (element == EL_MAUER_LEBT && (links_frei || rechts_frei))
+    DrawLevelField(ax, ay);
 
-  if (!IN_LEV_FIELD(ax-1,ay) || IS_MAUER(Feld[ax-1][ay]))
+  if (!IN_LEV_FIELD(ax, ay-1) || IS_MAUER(Feld[ax][ay-1]))
+    oben_massiv = TRUE;
+  if (!IN_LEV_FIELD(ax, ay+1) || IS_MAUER(Feld[ax][ay+1]))
+    unten_massiv = TRUE;
+  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]))
+  if (!IN_LEV_FIELD(ax+1, ay) || IS_MAUER(Feld[ax+1][ay]))
     rechts_massiv = TRUE;
 
-  if (links_massiv && rechts_massiv)
+  if (((oben_massiv && unten_massiv) ||
+       element == EL_MAUER_X || element == EL_MAUER_LEBT) &&
+      ((links_massiv && rechts_massiv) ||
+       element == EL_MAUER_Y))
     Feld[ax][ay] = EL_MAUERWERK;
 }
 
 void CheckForDragon(int x, int y)
 {
-  int i,j;
-  BOOL dragon_found = FALSE;
+  int i, j;
+  boolean dragon_found = FALSE;
   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++)
+    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) &&
+      if (IN_LEV_FIELD(xx, yy) &&
 	  (Feld[xx][yy] == EL_BURNING || Feld[xx][yy] == EL_DRACHE))
       {
 	if (Feld[xx][yy] == EL_DRACHE)
@@ -2684,16 +3971,16 @@ void CheckForDragon(int x, int y)
 
   if (!dragon_found)
   {
-    for(i=0;i<4;i++)
+    for (i=0; i<4; i++)
     {
-      for(j=0;j<3;j++)
+      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)
+  	if (IN_LEV_FIELD(xx, yy) && Feld[xx][yy] == EL_BURNING)
   	{
 	  Feld[xx][yy] = EL_LEERRAUM;
-	  DrawLevelField(xx,yy);
+	  DrawLevelField(xx, yy);
   	}
   	else
   	  break;
@@ -2702,9 +3989,144 @@ void CheckForDragon(int x, int y)
   }
 }
 
-void PlayerActions(struct PlayerInfo *player, int player_action)
+static void CheckBuggyBase(int x, int y)
+{
+  int element = Feld[x][y];
+
+  if (element == EL_SP_BUG)
+  {
+    if (!MovDelay[x][y])	/* wait some time before activating base */
+      MovDelay[x][y] = 2 * FRAMES_PER_SECOND + RND(5 * FRAMES_PER_SECOND);
+
+    if (MovDelay[x][y])
+    {
+      MovDelay[x][y]--;
+      if (MovDelay[x][y] < 5 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+	DrawGraphic(SCREENX(x), SCREENY(y), GFX_SP_BUG_WARNING);
+      if (MovDelay[x][y])
+	return;
+
+      Feld[x][y] = EL_SP_BUG_ACTIVE;
+    }
+  }
+  else if (element == EL_SP_BUG_ACTIVE)
+  {
+    if (!MovDelay[x][y])	/* start activating buggy base */
+      MovDelay[x][y] = 1 * FRAMES_PER_SECOND + RND(1 * FRAMES_PER_SECOND);
+
+    if (MovDelay[x][y])
+    {
+      MovDelay[x][y]--;
+      if (MovDelay[x][y])
+      {
+	int i;
+	static int xy[4][2] =
+	{
+	  { 0, -1 },
+	  { -1, 0 },
+	  { +1, 0 },
+	  { 0, +1 }
+	};
+
+	if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+	  DrawGraphic(SCREENX(x),SCREENY(y), GFX_SP_BUG_ACTIVE + SimpleRND(4));
+
+	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_BUG);
+	    break;
+	  }
+	}
+
+	return;
+      }
+
+      Feld[x][y] = EL_SP_BUG;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+static void CheckTrap(int x, int y)
+{
+  int element = Feld[x][y];
+
+  if (element == EL_TRAP_INACTIVE)
+  {
+    if (!MovDelay[x][y])	/* wait some time before activating trap */
+      MovDelay[x][y] = 2 * FRAMES_PER_SECOND + RND(5 * FRAMES_PER_SECOND);
+
+    if (MovDelay[x][y])
+    {
+      MovDelay[x][y]--;
+      if (MovDelay[x][y])
+	return;
+
+      Feld[x][y] = EL_TRAP_ACTIVE;
+    }
+  }
+  else if (element == EL_TRAP_ACTIVE)
+  {
+    int delay = 4;
+    int num_frames = 8;
+
+    if (!MovDelay[x][y])	/* start activating trap */
+      MovDelay[x][y] = num_frames * delay;
+
+    if (MovDelay[x][y])
+    {
+      MovDelay[x][y]--;
+
+      if (MovDelay[x][y])
+      {
+	if (!(MovDelay[x][y] % delay))
+	{
+	  int phase = MovDelay[x][y]/delay;
+
+	  if (phase >= num_frames/2)
+	    phase = num_frames - phase;
+
+	  if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+	  {
+	    DrawGraphic(SCREENX(x),SCREENY(y), GFX_TRAP_INACTIVE + phase - 1);
+	    ErdreichAnbroeckeln(SCREENX(x), SCREENY(y));
+	  }
+	}
+
+	return;
+      }
+
+      Feld[x][y] = EL_TRAP_INACTIVE;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+static void DrawBeltAnimation(int x, int y, int element)
+{
+  int belt_nr = getBeltNrFromElement(element);
+  int belt_dir = game.belt_dir[belt_nr];
+
+  if (belt_dir != MV_NO_MOVING)
+  {
+    int delay = 2;
+    int mode = (belt_dir == MV_LEFT ? ANIM_NORMAL : ANIM_REVERSE);
+    int graphic = el2gfx(element) + (belt_dir == MV_LEFT ? 0 : 7);
+
+    DrawGraphicAnimation(x, y, graphic, 8, delay, mode);
+  }
+}
+
+static void PlayerActions(struct PlayerInfo *player, byte player_action)
 {
-  BOOL moved = FALSE, snapped = FALSE, bombed = FALSE;
+  static byte stored_player_action[MAX_PLAYERS];
+  static int num_stored_actions = 0;
+  static boolean save_tape_entry = FALSE;
+  boolean moved = FALSE, snapped = FALSE, bombed = FALSE;
   int jx = player->jx, jy = player->jy;
   int left	= player_action & JOY_LEFT;
   int right	= player_action & JOY_RIGHT;
@@ -2715,52 +4137,71 @@ void PlayerActions(struct PlayerInfo *player, int player_action)
   int dx	= (left ? -1	: right ? 1	: 0);
   int dy	= (up   ? -1	: down  ? 1	: 0);
 
-  if (!player->active || player->gone)
+  stored_player_action[player->index_nr] = 0;
+  num_stored_actions++;
+
+  if (!player->active || tape.pausing)
     return;
 
   if (player_action)
   {
+    save_tape_entry = TRUE;
     player->frame_reset_delay = 0;
 
     if (button1)
-      snapped = SnapField(player, dx,dy);
+      snapped = SnapField(player, dx, dy);
     else
     {
       if (button2)
 	bombed = PlaceBomb(player);
-      moved = MoveFigure(player, dx,dy);
+      moved = MoveFigure(player, dx, dy);
     }
 
     if (tape.recording && (moved || snapped || bombed))
     {
       if (bombed && !moved)
 	player_action &= JOY_BUTTON;
-      TapeRecordAction(player_action);
+
+      stored_player_action[player->index_nr] = player_action;
     }
     else if (tape.playing && snapped)
-      SnapField(player, 0,0);			/* stop snapping */
+      SnapField(player, 0, 0);			/* stop snapping */
   }
   else
   {
-    DigField(player, 0,0, 0,0, DF_NO_PUSH);
-    SnapField(player, 0,0);
-    if (++player->frame_reset_delay > MoveSpeed)
+    /* no actions for this player (no input at player's configured device) */
+
+    DigField(player, 0, 0, 0, 0, DF_NO_PUSH);
+    SnapField(player, 0, 0);
+    CheckGravityMovement(player);
+
+    if (++player->frame_reset_delay > player->move_delay_value)
       player->Frame = 0;
   }
 
+  if (tape.recording && num_stored_actions >= MAX_PLAYERS && save_tape_entry)
+  {
+    TapeRecordAction(stored_player_action);
+    num_stored_actions = 0;
+    save_tape_entry = FALSE;
+  }
+
   if (tape.playing && !tape.pausing && !player_action &&
       tape.counter < tape.length)
   {
-    int next_joy = tape.pos[tape.counter].joystickdata & (JOY_LEFT|JOY_RIGHT);
+    int next_joy =
+      tape.pos[tape.counter].action[player->index_nr] & (JOY_LEFT|JOY_RIGHT);
 
-    if (next_joy == JOY_LEFT || next_joy == JOY_RIGHT)
+    if ((next_joy == JOY_LEFT || next_joy == JOY_RIGHT) &&
+	(player->MovDir != JOY_UP && player->MovDir != JOY_DOWN))
     {
       int dx = (next_joy == JOY_LEFT ? -1 : +1);
 
-      if (IN_LEV_FIELD(jx+dx,jy) && IS_PUSHABLE(Feld[jx+dx][jy]))
+      if (IN_LEV_FIELD(jx+dx, jy) && IS_PUSHABLE(Feld[jx+dx][jy]))
       {
 	int el = Feld[jx+dx][jy];
-	int push_delay = (IS_SB_ELEMENT(el) || el==EL_SONDE ? 2 : 10);
+	int push_delay = (IS_SB_ELEMENT(el) || el == EL_SONDE ? 2 :
+			  (el == EL_BALLOON || el == EL_SPRING) ? 0 : 10);
 
 	if (tape.delay_played + push_delay >= tape.pos[tape.counter].delay)
 	{
@@ -2773,133 +4214,239 @@ void PlayerActions(struct PlayerInfo *player, int player_action)
   }
 }
 
-void GameActions(int player_action)
+void GameActions()
 {
-  static long action_delay = 0;
-  long action_delay_value;
+  static unsigned long action_delay = 0;
+  unsigned long action_delay_value;
   int sieb_x = 0, sieb_y = 0;
-  int i, x,y, element;
+  int i, x, y, element;
+  byte *recorded_player_action;
+  byte summarized_player_action = 0;
 
   if (game_status != PLAYING)
     return;
 
-#ifdef DEBUG
   action_delay_value =
-    (tape.playing && tape.fast_forward ? FFWD_FRAME_DELAY : GameFrameDelay);
-#else
-  action_delay_value =
-    (tape.playing && tape.fast_forward ? FFWD_FRAME_DELAY : GAME_FRAME_DELAY);
-#endif
+    (tape.playing && tape.fast_forward ? FfwdFrameDelay : GameFrameDelay);
+
+  /* ---------- main game synchronization point ---------- */
 
-  /* main game synchronization point */
   WaitUntilDelayReached(&action_delay, action_delay_value);
 
-  for(i=0; i<MAX_PLAYERS; i++)
+  if (network_playing && !network_player_action_received)
   {
-    /* TEST TEST TEST */
+    /*
+#ifdef DEBUG
+    printf("DEBUG: try to get network player actions in time\n");
+#endif
+    */
 
-    if (i != TestPlayer)
-      continue;
+#ifndef MSDOS
+    /* last chance to get network player actions without main loop delay */
+    HandleNetworking();
+#endif
+
+    if (game_status != PLAYING)
+      return;
+
+    if (!network_player_action_received)
+    {
+      /*
+#ifdef DEBUG
+      printf("DEBUG: failed to get network player actions in time\n");
+#endif
+      */
+      return;
+    }
+  }
+
+  if (tape.pausing)
+    return;
+
+  if (tape.playing)
+    TapePlayDelay();
+  else if (tape.recording)
+    TapeRecordDelay();
 
-    /* TEST TEST TEST */
+  recorded_player_action = (tape.playing ? TapePlayAction() : NULL);
 
-    PlayerActions(&stored_player[i], player_action);
+  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;
+  }
+
+#ifndef MSDOS
+  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 (tape.pausing || (tape.playing && !TapePlayDelay()))
-    return;
-  else if (tape.recording)
-    TapeRecordDelay();
+
+
+#ifdef DEBUG
+#if 0
+  if (TimeFrames == 0 && local_player->active)
+  {
+    extern unsigned int last_RND();
+
+    printf("DEBUG: %03d last RND was %d \t [state checksum is %d]\n",
+	   TimePlayed, last_RND(), getStateCheckSum(TimePlayed));
+  }
+#endif
+#endif
+
+#ifdef DEBUG
+#if 0
+  if (GameFrameDelay >= 500)
+    printf("FrameCounter == %d\n", FrameCounter);
+#endif
+#endif
+
+
 
   FrameCounter++;
   TimeFrames++;
 
-  for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
+  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]--;
+    if (JustStopped[x][y] > 0)
+      JustStopped[x][y]--;
 
 #if DEBUG
-    if (IS_BLOCKED(x,y))
+    if (IS_BLOCKED(x, y))
     {
-      int oldx,oldy;
+      int oldx, oldy;
 
-      Blocked2Moving(x,y,&oldx,&oldy);
-      if (!IS_MOVING(oldx,oldy))
+      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(): (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
   }
 
-  for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
+  for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
   {
     element = Feld[x][y];
 
     if (IS_INACTIVE(element))
       continue;
 
-    if (!IS_MOVING(x,y) && (CAN_FALL(element) || CAN_MOVE(element)))
+    if (!IS_MOVING(x, y) && (CAN_FALL(element) || CAN_MOVE(element)))
     {
-      StartMoving(x,y);
+      StartMoving(x, y);
 
       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);
+	EdelsteinFunkeln(x, y);
+    }
+    else if (IS_MOVING(x, y))
+      ContinueMoving(x, y);
+    else if (IS_ACTIVE_BOMB(element))
+      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 (element == EL_DEAMOEBING)
+      AmoebeSchrumpft(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);
-
-    if (SiebAktiv)
-    {
-      BOOL sieb = FALSE;
+      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_TIMEGATE_SWITCH_ON)
+      TimegateWheel(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_PEARL_BREAKING)
+      BreakingPearl(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 ||
+	     element == EL_MAUER_X ||
+	     element == EL_MAUER_Y ||
+	     element == EL_MAUER_XY)
+      MauerAbleger(x, y);
+    else if (element == EL_BURNING)
+      CheckForDragon(x, y);
+    else if (element == EL_SP_BUG || element == EL_SP_BUG_ACTIVE)
+      CheckBuggyBase(x, y);
+    else if (element == EL_TRAP_INACTIVE || element == EL_TRAP_ACTIVE)
+      CheckTrap(x, y);
+    else if (element == EL_SP_TERMINAL)
+      DrawGraphicAnimation(x, y, GFX2_SP_TERMINAL, 7, 12, ANIM_NORMAL);
+    else if (element == EL_SP_TERMINAL_ACTIVE)
+      DrawGraphicAnimation(x, y, GFX2_SP_TERMINAL_ACTIVE, 7, 4, ANIM_NORMAL);
+    else if (IS_BELT(element))
+      DrawBeltAnimation(x, y, element);
+    else if (element == EL_SWITCHGATE_OPENING)
+      OpenSwitchgate(x, y);
+    else if (element == EL_SWITCHGATE_CLOSING)
+      CloseSwitchgate(x, y);
+    else if (element == EL_TIMEGATE_OPENING)
+      OpenTimegate(x, y);
+    else if (element == EL_TIMEGATE_CLOSING)
+      CloseTimegate(x, y);
+    else if (element == EL_EXTRA_TIME)
+      DrawGraphicAnimation(x, y, GFX_EXTRA_TIME, 6, 4, ANIM_NORMAL);
+    else if (element == EL_SHIELD_PASSIVE)
+      DrawGraphicAnimation(x, y, GFX_SHIELD_PASSIVE, 6, 4, ANIM_NORMAL);
+    else if (element == EL_SHIELD_ACTIVE)
+      DrawGraphicAnimation(x, y, GFX_SHIELD_ACTIVE, 6, 4, ANIM_NORMAL);
+
+    if (game.magic_wall_active)
+    {
+      boolean sieb = FALSE;
       int jx = local_player->jx, jy = local_player->jy;
 
-      if (element==EL_SIEB_LEER || element==EL_SIEB_VOLL ||
-	  Store[x][y]==EL_SIEB_LEER)
+      if (element == EL_MAGIC_WALL_EMPTY || element == EL_MAGIC_WALL_FULL ||
+	  Store[x][y] == EL_MAGIC_WALL_EMPTY)
       {
 	SiebAktivieren(x, y, 1);
 	sieb = TRUE;
       }
-      else if (element==EL_SIEB2_LEER || element==EL_SIEB2_VOLL ||
-	       Store[x][y]==EL_SIEB2_LEER)
+      else if (element == EL_MAGIC_WALL_BD_EMPTY ||
+	       element == EL_MAGIC_WALL_BD_FULL ||
+	       Store[x][y] == EL_MAGIC_WALL_BD_EMPTY)
       {
 	SiebAktivieren(x, y, 2);
 	sieb = TRUE;
@@ -2914,62 +4461,118 @@ void GameActions(int player_action)
     }
   }
 
-  if (SiebAktiv)
+  if (game.magic_wall_active)
   {
-    if (!(SiebAktiv%4))
-      PlaySoundLevel(sieb_x,sieb_y,SND_MIEP);
-    SiebAktiv--;
-    if (!SiebAktiv)
+    if (!(game.magic_wall_time_left % 4))
+      PlaySoundLevel(sieb_x, sieb_y, SND_MIEP);
+
+    if (game.magic_wall_time_left > 0)
     {
-      for(y=0;y<lev_fieldy;y++) for(x=0;x<lev_fieldx;x++)
+      game.magic_wall_time_left--;
+      if (!game.magic_wall_time_left)
       {
-	element = Feld[x][y];
-	if (element==EL_SIEB_LEER || element==EL_SIEB_VOLL)
+	for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
 	{
-	  Feld[x][y] = EL_SIEB_TOT;
-	  DrawLevelField(x,y);
+	  element = Feld[x][y];
+
+	  if (element == EL_MAGIC_WALL_EMPTY || element == EL_MAGIC_WALL_FULL)
+	  {
+	    Feld[x][y] = EL_MAGIC_WALL_DEAD;
+	    DrawLevelField(x, y);
+	  }
+	  else if (element == EL_MAGIC_WALL_BD_EMPTY ||
+		   element == EL_MAGIC_WALL_BD_FULL)
+	  {
+	    Feld[x][y] = EL_MAGIC_WALL_BD_DEAD;
+	    DrawLevelField(x, y);
+	  }
 	}
-	else if (element==EL_SIEB2_LEER || element==EL_SIEB2_VOLL)
+
+	game.magic_wall_active = FALSE;
+      }
+    }
+  }
+
+  if (game.light_time_left > 0)
+  {
+    game.light_time_left--;
+
+    if (game.light_time_left == 0)
+    {
+      for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
+      {
+	element = Feld[x][y];
+
+	if (element == EL_LIGHT_SWITCH_ON)
 	{
-	  Feld[x][y] = EL_SIEB2_TOT;
-	  DrawLevelField(x,y);
+	  Feld[x][y] = EL_LIGHT_SWITCH_OFF;
+	  DrawLevelField(x, y);
 	}
+	else if (element == EL_INVISIBLE_STEEL ||
+		 element == EL_UNSICHTBAR ||
+		 element == EL_SAND_INVISIBLE)
+	  DrawLevelField(x, y);
       }
     }
   }
 
-  if (TimeLeft>0 && TimeFrames>=(1000/GameFrameDelay) && !tape.pausing)
+  if (game.timegate_time_left > 0)
+  {
+    game.timegate_time_left--;
+
+    if (game.timegate_time_left == 0)
+      CloseAllOpenTimegates();
+  }
+
+  if (TimeFrames >= (1000 / GameFrameDelay))
   {
     TimeFrames = 0;
-    TimeLeft--;
+    TimePlayed++;
+
+    for (i=0; i<MAX_PLAYERS; i++)
+    {
+      if (SHIELD_ON(&stored_player[i]))
+      {
+	stored_player[i].shield_passive_time_left--;
+
+	if (stored_player[i].shield_active_time_left > 0)
+	  stored_player[i].shield_active_time_left--;
+      }
+    }
 
     if (tape.recording || tape.playing)
-      DrawVideoDisplay(VIDEO_STATE_TIME_ON,level.time-TimeLeft);
+      DrawVideoDisplay(VIDEO_STATE_TIME_ON, TimePlayed);
+
+    if (TimeLeft > 0)
+    {
+      TimeLeft--;
 
-    if (TimeLeft<=10)
-      PlaySoundStereo(SND_GONG,PSND_MAX_RIGHT);
+      if (TimeLeft <= 10 && setup.time_limit)
+	PlaySoundStereo(SND_GONG, PSND_MAX_RIGHT);
 
-    DrawText(DX_TIME,DY_TIME,int2str(TimeLeft,3),FS_SMALL,FC_YELLOW);
+      DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FS_SMALL, FC_YELLOW);
 
-    if (!TimeLeft)
-      for(i=0; i<MAX_PLAYERS; i++)
-	KillHero(&stored_player[i]);
+      if (!TimeLeft && setup.time_limit)
+	for (i=0; i<MAX_PLAYERS; i++)
+	  KillHero(&stored_player[i]);
+    }
+    else if (level.time == 0)		/* level without time limit */
+      DrawText(DX_TIME, DY_TIME, int2str(TimePlayed, 3), FS_SMALL, FC_YELLOW);
   }
 
   DrawAllPlayers();
 }
 
-static BOOL AllPlayersInSight(struct PlayerInfo *player, int x, int y)
+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;
 
-  for(i=0; i<MAX_PLAYERS; i++)
+  for (i=0; i<MAX_PLAYERS; i++)
   {
     int jx = stored_player[i].jx, jy = stored_player[i].jy;
 
-    if (!stored_player[i].active || stored_player[i].gone ||
-	&stored_player[i] == player)
+    if (!stored_player[i].active || &stored_player[i] == player)
       continue;
 
     min_x = MIN(min_x, jx);
@@ -2978,157 +4581,209 @@ static BOOL AllPlayersInSight(struct PlayerInfo *player, int x, int y)
     max_y = MAX(max_y, jy);
   }
 
-  return(max_x - min_x < SCR_FIELDX && max_y - min_y < SCR_FIELDY);
+  return (max_x - min_x < SCR_FIELDX && max_y - min_y < SCR_FIELDY);
 }
 
-static BOOL AllPlayersInVisibleScreen()
+static boolean AllPlayersInVisibleScreen()
 {
   int i;
 
-  for(i=0; i<MAX_PLAYERS; i++)
+  for (i=0; i<MAX_PLAYERS; i++)
   {
     int jx = stored_player[i].jx, jy = stored_player[i].jy;
 
-    if (!stored_player[i].active || stored_player[i].gone)
+    if (!stored_player[i].active)
       continue;
 
     if (!IN_VIS_FIELD(SCREENX(jx), SCREENY(jy)))
-      return(FALSE);
+      return FALSE;
   }
 
-  return(TRUE);
+  return TRUE;
 }
 
 void ScrollLevel(int dx, int dy)
 {
-  int softscroll_offset = (soft_scrolling_on ? TILEX : 0);
-  int x,y;
-
-  /*
-  ScreenGfxPos = local_player->GfxPos;
-  */
+  int softscroll_offset = (setup.soft_scrolling ? TILEX : 0);
+  int x, y;
 
-  XCopyArea(display,drawto_field,drawto_field,gc,
-	    FX + TILEX*(dx==-1) - softscroll_offset,
-	    FY + TILEY*(dy==-1) - softscroll_offset,
+  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);
+	    FX + TILEX*(dx == 1) - softscroll_offset,
+	    FY + TILEY*(dy == 1) - softscroll_offset);
 
   if (dx)
   {
-    x = (dx==1 ? BX1 : BX2);
-    for(y=BY1; y<=BY2; y++)
-      DrawScreenField(x,y);
+    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);
+    y = (dy == 1 ? BY1 : BY2);
+    for (x=BX1; x<=BX2; x++)
+      DrawScreenField(x, y);
   }
 
   redraw_mask |= REDRAW_FIELD;
 }
 
-BOOL MoveFigureOneStep(struct PlayerInfo *player,
-		       int dx, int dy, int real_dx, int real_dy)
+static void CheckGravityMovement(struct PlayerInfo *player)
+{
+  if (level.gravity && !player->programmed_action)
+  {
+    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_ERDREICH));
+
+    if (field_under_player_is_free && !player_is_moving_to_valid_field)
+      player->programmed_action = MV_DOWN;
+  }
+}
+
+boolean MoveFigureOneStep(struct PlayerInfo *player,
+			  int dx, int dy, int real_dx, int real_dy)
 {
   int jx = player->jx, jy = player->jy;
   int new_jx = jx+dx, new_jy = jy+dy;
   int element;
   int can_move;
 
-  if (player->gone || (!dx && !dy))
-    return(MF_NO_ACTION);
+  if (!player->active || (!dx && !dy))
+    return MF_NO_ACTION;
 
   player->MovDir = (dx < 0 ? MV_LEFT :
 		    dx > 0 ? MV_RIGHT :
 		    dy < 0 ? MV_UP :
 		    dy > 0 ? MV_DOWN :	MV_NO_MOVING);
 
-  if (!IN_LEV_FIELD(new_jx,new_jy))
-    return(MF_NO_ACTION);
+  if (!IN_LEV_FIELD(new_jx, new_jy))
+    return MF_NO_ACTION;
 
-  if (!networking && !AllPlayersInSight(player, new_jx,new_jy))
-    return(MF_NO_ACTION);
+  if (!options.network && !AllPlayersInSight(player, new_jx, new_jy))
+    return MF_NO_ACTION;
 
-  element = MovingOrBlocked2Element(new_jx,new_jy);
+#if 0
+  element = MovingOrBlocked2Element(new_jx, new_jy);
+#else
+  element = MovingOrBlocked2ElementIfNotLeaving(new_jx, new_jy);
+#endif
 
   if (DONT_GO_TO(element))
   {
-    if (element==EL_SALZSAEURE && dx==0 && dy==1)
+    if (element == EL_SALZSAEURE && dx == 0 && dy == 1)
     {
-      Blurb(jx,jy);
+      Blurb(jx, jy);
       Feld[jx][jy] = EL_SPIELFIGUR;
-      InitMovingField(jx,jy,MV_DOWN);
+      InitMovingField(jx, jy, MV_DOWN);
       Store[jx][jy] = EL_SALZSAEURE;
-      ContinueMoving(jx,jy);
+      ContinueMoving(jx, jy);
       BuryHero(player);
     }
     else
-      KillHero(player);
+      TestIfBadThingHitsHero(new_jx, new_jy);
 
-    return(MF_MOVING);
+    return MF_MOVING;
   }
 
-  can_move = DigField(player, new_jx,new_jy, real_dx,real_dy, DF_DIG);
+  can_move = DigField(player, new_jx, new_jy, real_dx, real_dy, DF_DIG);
   if (can_move != MF_MOVING)
-    return(can_move);
+    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] = EL_SPIELER1 + player->nr;
+  StorePlayer[jx][jy] = player->element_nr;
 
-  player->MovPos = (dx > 0 || dy > 0 ? -1 : 1) * 7*TILEX/8;
+  player->MovPos =
+    (dx > 0 || dy > 0 ? -1 : 1) * (TILEX - TILEX / player->move_delay_value);
 
   ScrollFigure(player, SCROLL_INIT);
 
-  return(MF_MOVING);
+  return MF_MOVING;
 }
 
-BOOL MoveFigure(struct PlayerInfo *player, int dx, int dy)
+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 (player->gone || (!dx && !dy))
-    return(FALSE);
+  if (!player->active || (!dx && !dy))
+    return FALSE;
+
+  if (!FrameReached(&player->move_delay, player->move_delay_value) &&
+      !tape.playing)
+    return FALSE;
+
+  /* remove the last programmed player action */
+  player->programmed_action = 0;
+
+  if (player->MovPos)
+  {
+    /* should only happen if pre-1.2 tape recordings are played */
+    /* this is only for backward compatibility */
+
+    int original_move_delay_value = player->move_delay_value;
+
+#if DEBUG
+    printf("THIS SHOULD ONLY HAPPEN WITH PRE-1.2 LEVEL TAPES.\n");
+#endif
+
+    /* scroll remaining steps with finest movement resolution */
+    player->move_delay_value = MOVE_DELAY_NORMAL_SPEED;
+
+    while (player->MovPos)
+    {
+      ScrollFigure(player, SCROLL_GO_ON);
+      ScrollScreen(NULL, SCROLL_GO_ON);
+      FrameCounter++;
+      DrawAllPlayers();
+      BackToFront();
+    }
 
-  if (!FrameReached(&player->move_delay,MoveSpeed) && !tape.playing)
-    return(FALSE);
+    player->move_delay_value = original_move_delay_value;
+  }
 
   if (player->last_move_dir & (MV_LEFT | MV_RIGHT))
   {
-    if (!(moved |= MoveFigureOneStep(player, 0,dy, dx,dy)))
-      moved |= MoveFigureOneStep(player, dx,0, dx,dy);
+    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);
+    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 && player == local_player)
-  */
-
-  if (moved & MF_MOVING && !ScreenMovPos)
+  if (moved & MF_MOVING && !ScreenMovPos &&
+      (player == local_player || !options.network))
   {
     int old_scroll_x = scroll_x, old_scroll_y = scroll_y;
-    int offset = (scroll_delay_on ? 3 : 0);
+    int offset = (setup.scroll_delay ? 3 : 0);
 
-    if (!IN_VIS_FIELD(SCREENX(jx),SCREENY(jy)))
+    if (!IN_VIS_FIELD(SCREENX(jx), SCREENY(jy)))
     {
       /* actual player has left the screen -- scroll in that direction */
       if (jx != old_jx)		/* player has moved horizontally */
@@ -3140,9 +4795,13 @@ BOOL MoveFigure(struct PlayerInfo *player, int dx, int dy)
     {
       if (jx != old_jx)		/* player has moved horizontally */
       {
-	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 ((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);
+
+	/* 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);
@@ -3154,9 +4813,13 @@ BOOL MoveFigure(struct PlayerInfo *player, int dx, int dy)
       }
       else			/* player has moved vertically */
       {
-	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 ((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);
@@ -3168,41 +4831,18 @@ BOOL MoveFigure(struct PlayerInfo *player, int dx, int dy)
       }
     }
 
-#if 0
-    if (player == local_player)
-    {
-      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);
-
-      /* don't scroll more than one field at a time */
-      scroll_x = old_scroll_x + SIGN(scroll_x - old_scroll_x);
-      scroll_y = old_scroll_y + SIGN(scroll_y - old_scroll_y);
-    }
-#endif
-
     if (scroll_x != old_scroll_x || scroll_y != old_scroll_y)
-    {
-      if (networking || AllPlayersInVisibleScreen())
-      {
-	ScrollScreen(player, SCROLL_INIT);
-
-	/*
-	ScreenMovDir = player->MovDir;
-	ScreenMovPos = player->MovPos;
-	ScreenGfxPos = ScrollStepSize * (ScreenMovPos / ScrollStepSize);
-	*/
-
-	ScrollLevel(old_scroll_x - scroll_x, old_scroll_y - scroll_y);
-      }
-      else
+    {
+      if (!options.network && !AllPlayersInVisibleScreen())
       {
 	scroll_x = old_scroll_x;
 	scroll_y = old_scroll_y;
       }
+      else
+      {
+	ScrollScreen(player, SCROLL_INIT);
+	ScrollLevel(old_scroll_x - scroll_x, old_scroll_y - scroll_y);
+      }
     }
   }
 
@@ -3218,37 +4858,38 @@ BOOL MoveFigure(struct PlayerInfo *player, int dx, int dy)
     else if (old_jx == jx && old_jy != jy)
       player->MovDir = (old_jy < jy ? MV_DOWN : MV_UP);
 
-    DrawLevelField(jx,jy);	/* für "ErdreichAnbroeckeln()" */
+    DrawLevelField(jx, jy);	/* for "ErdreichAnbroeckeln()" */
 
     player->last_move_dir = player->MovDir;
   }
   else
+  {
+    CheckGravityMovement(player);
+
     player->last_move_dir = MV_NO_MOVING;
+  }
 
-  TestIfHeroHitsBadThing(jx,jy);
+  TestIfHeroHitsBadThing(jx, jy);
 
-  if (player->gone)
+  if (!player->active)
     RemoveHero(player);
 
-  return(moved);
+  return moved;
 }
 
 void ScrollFigure(struct PlayerInfo *player, int mode)
 {
   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 (!player->active || player->gone || !player->MovPos)
+  if (!player->active || !player->MovPos)
     return;
 
   if (mode == SCROLL_INIT)
   {
     player->actual_frame_counter = FrameCounter;
-    player->GfxPos = ScrollStepSize * (player->MovPos / ScrollStepSize);
-
-    /*
-    ScreenGfxPos = local_player->GfxPos;
-    */
+    player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
     if (Feld[last_jx][last_jy] == EL_LEERRAUM)
       Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
@@ -3256,35 +4897,32 @@ void ScrollFigure(struct PlayerInfo *player, int mode)
     DrawPlayer(player);
     return;
   }
-  else if (!FrameReached(&player->actual_frame_counter,1))
+  else if (!FrameReached(&player->actual_frame_counter, 1))
     return;
 
-  player->MovPos += (player->MovPos > 0 ? -1 : 1) * TILEX/8;
-  player->GfxPos = ScrollStepSize * (player->MovPos / ScrollStepSize);
-
-  /*
-  if (ScreenMovPos)
-  {
-    ScreenMovPos += (ScreenMovPos > 0 ? -1 : 1) * TILEX/8;
-    ScreenGfxPos = ScrollStepSize * (ScreenMovPos / ScrollStepSize);
-  }
-  */
-
-  /*
-  if (ScreenGfxPos && ScreenGfxPos != local_player->GfxPos)
-  {
-    ScreenGfxPos = local_player->GfxPos;
-    redraw_mask |= REDRAW_FIELD;
-  }
-  */
+  player->MovPos += (player->MovPos > 0 ? -1 : 1) * move_stepsize;
+  player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
   if (Feld[last_jx][last_jy] == EL_PLAYER_IS_LEAVING)
     Feld[last_jx][last_jy] = EL_LEERRAUM;
 
+  /* before DrawPlayer() to draw correct player graphic for this case */
+  if (player->MovPos == 0)
+    CheckGravityMovement(player);
+
   DrawPlayer(player);
 
-  if (!player->MovPos)
+  if (player->MovPos == 0)
   {
+    if (IS_QUICK_GATE(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;
+    }
+
     player->last_jx = jx;
     player->last_jy = jy;
 
@@ -3300,28 +4938,25 @@ void ScrollFigure(struct PlayerInfo *player, int mode)
 
 void ScrollScreen(struct PlayerInfo *player, int mode)
 {
-  static long screen_frame_counter = 0;
+  static unsigned long screen_frame_counter = 0;
 
   if (mode == SCROLL_INIT)
   {
+    /* 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))
+  else if (!FrameReached(&screen_frame_counter, 1))
     return;
 
   if (ScreenMovPos)
   {
-    /*
-    printf("ScreenMovDir = %d, ", ScreenMovDir);
-    printf("ScreenMovPos = %d, ", ScreenMovPos);
-    printf("ScreenGfxPos = %d\n", ScreenGfxPos);
-    */
-
-    ScreenMovPos += (ScreenMovPos > 0 ? -1 : 1) * TILEX/8;
+    ScreenMovPos += (ScreenMovPos > 0 ? -1 : 1) * ScrollStepSize;
     ScreenGfxPos = ScrollStepSize * (ScreenMovPos / ScrollStepSize);
     redraw_mask |= REDRAW_FIELD;
   }
@@ -3334,10 +4969,10 @@ 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 }
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
   };
   static int harmless[4] =
   {
@@ -3347,16 +4982,20 @@ void TestIfGoodThingHitsBadThing(int goodx, int goody)
     MV_DOWN
   };
 
-  for(i=0; i<4; i++)
+  for (i=0; i<4; i++)
   {
-    int x,y, element;
+    int x, y, element;
 
     x = goodx + xy[i][0];
     y = goody + xy[i][1];
-    if (!IN_LEV_FIELD(x,y))
+    if (!IN_LEV_FIELD(x, y))
       continue;
 
+#if 0
     element = Feld[x][y];
+#else
+    element = MovingOrBlocked2ElementIfNotLeaving(x, y);
+#endif
 
     if (DONT_TOUCH(element))
     {
@@ -3371,10 +5010,17 @@ void TestIfGoodThingHitsBadThing(int goodx, int goody)
 
   if (killx != goodx || killy != goody)
   {
-    if (IS_PLAYER(goodx,goody))
-      KillHero(PLAYERINFO(goodx,goody));
+    if (IS_PLAYER(goodx, goody))
+    {
+      struct PlayerInfo *player = PLAYERINFO(goodx, goody);
+
+      if (player->shield_active_time_left > 0)
+	Bang(killx, killy);
+      else if (!PLAYER_PROTECTED(goodx, goody))
+	KillHero(player);
+    }
     else
-      Bang(goodx,goody);
+      Bang(goodx, goody);
   }
 }
 
@@ -3383,10 +5029,10 @@ 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 }
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
   };
   static int harmless[4] =
   {
@@ -3396,18 +5042,21 @@ void TestIfBadThingHitsGoodThing(int badx, int bady)
     MV_DOWN
   };
 
-  for(i=0; i<4; i++)
+  if (Feld[badx][bady] == EL_EXPLODING)	/* skip just exploding bad things */
+    return;
+
+  for (i=0; i<4; i++)
   {
-    int x,y, element;
+    int x, y, element;
 
     x = badx + xy[i][0];
     y = bady + xy[i][1];
-    if (!IN_LEV_FIELD(x,y))
+    if (!IN_LEV_FIELD(x, y))
       continue;
 
     element = Feld[x][y];
 
-    if (IS_PLAYER(x,y))
+    if (IS_PLAYER(x, y))
     {
       killx = x;
       killy = y;
@@ -3415,7 +5064,7 @@ void TestIfBadThingHitsGoodThing(int badx, int bady)
     }
     else if (element == EL_PINGUIN)
     {
-      if (MovDir[x][y] == harmless[i] && IS_MOVING(x,y))
+      if (MovDir[x][y] == harmless[i] && IS_MOVING(x, y))
 	continue;
 
       killx = x;
@@ -3426,35 +5075,38 @@ void TestIfBadThingHitsGoodThing(int badx, int bady)
 
   if (killx != badx || killy != bady)
   {
-    if (IS_PLAYER(killx,killy))
-      KillHero(PLAYERINFO(killx,killy));
+    if (IS_PLAYER(killx, killy))
+    {
+      struct PlayerInfo *player = PLAYERINFO(killx, killy);
+
+      if (player->shield_active_time_left > 0)
+	Bang(badx, bady);
+      else if (!PLAYER_PROTECTED(killx, killy))
+	KillHero(player);
+    }
     else
-      Bang(killx,killy);
+      Bang(killx, killy);
   }
 }
 
 void TestIfHeroHitsBadThing(int x, int y)
 {
-  TestIfGoodThingHitsBadThing(x,y);
+  TestIfGoodThingHitsBadThing(x, y);
 }
 
 void TestIfBadThingHitsHero(int x, int y)
 {
-  /*
-  TestIfGoodThingHitsBadThing(JX,JY);
-  */
-
-  TestIfBadThingHitsGoodThing(x,y);
+  TestIfBadThingHitsGoodThing(x, y);
 }
 
 void TestIfFriendHitsBadThing(int x, int y)
 {
-  TestIfGoodThingHitsBadThing(x,y);
+  TestIfGoodThingHitsBadThing(x, y);
 }
 
 void TestIfBadThingHitsFriend(int x, int y)
 {
-  TestIfBadThingHitsGoodThing(x,y);
+  TestIfBadThingHitsGoodThing(x, y);
 }
 
 void TestIfBadThingHitsOtherBadThing(int badx, int bady)
@@ -3462,19 +5114,19 @@ 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 }
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
   };
 
-  for(i=0; i<4; i++)
+  for (i=0; i<4; i++)
   {
-    int x,y, element;
+    int x, y, element;
 
     x=badx + xy[i][0];
     y=bady + xy[i][1];
-    if (!IN_LEV_FIELD(x,y))
+    if (!IN_LEV_FIELD(x, y))
       continue;
 
     element = Feld[x][y];
@@ -3488,32 +5140,42 @@ void TestIfBadThingHitsOtherBadThing(int badx, int bady)
   }
 
   if (killx != badx || killy != bady)
-    Bang(badx,bady);
+    Bang(badx, bady);
 }
 
 void KillHero(struct PlayerInfo *player)
 {
   int jx = player->jx, jy = player->jy;
 
-  if (player->gone)
+  if (!player->active)
     return;
 
   if (IS_PFORTE(Feld[jx][jy]))
     Feld[jx][jy] = EL_LEERRAUM;
 
-  Bang(jx,jy);
+  /* deactivate shield (else Bang()/Explode() would not work right) */
+  player->shield_passive_time_left = 0;
+  player->shield_active_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->gone)
+  if (!player->active)
     return;
 
-  PlaySoundLevel(jx,jy, SND_AUTSCH);
-  PlaySoundLevel(jx,jy, SND_LACHEN);
+  PlaySoundLevel(jx, jy, SND_AUTSCH);
+  PlaySoundLevel(jx, jy, SND_LACHEN);
 
   player->GameOver = TRUE;
   RemoveHero(player);
@@ -3524,11 +5186,13 @@ void RemoveHero(struct PlayerInfo *player)
   int jx = player->jx, jy = player->jy;
   int i, found = FALSE;
 
-  player->gone = TRUE;
+  player->present = FALSE;
+  player->active = FALSE;
+
   StorePlayer[jx][jy] = 0;
 
-  for(i=0; i<MAX_PLAYERS; i++)
-    if (stored_player[i].active && !stored_player[i].gone)
+  for (i=0; i<MAX_PLAYERS; i++)
+    if (stored_player[i].active)
       found = TRUE;
 
   if (!found)
@@ -3543,6 +5207,10 @@ int DigField(struct PlayerInfo *player,
 {
   int jx = player->jx, jy = player->jy;
   int dx = x - jx, dy = y - jy;
+  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 (!player->MovPos)
@@ -3550,22 +5218,63 @@ int DigField(struct PlayerInfo *player,
 
   if (mode == DF_NO_PUSH)
   {
+    player->Switching = FALSE;
     player->push_delay = 0;
-    return(MF_NO_ACTION);
+    return MF_NO_ACTION;
   }
 
-  if (IS_MOVING(x,y) || IS_PLAYER(x,y))
-    return(MF_NO_ACTION);
+  if (IS_MOVING(x, y) || IS_PLAYER(x, y))
+    return MF_NO_ACTION;
+
+  if (IS_TUBE(Feld[jx][jy]))
+  {
+    int i = 0;
+    int tube_leave_directions[][2] =
+    {
+      { EL_TUBE_CROSS,		MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
+      { EL_TUBE_VERTICAL,	                     MV_UP | MV_DOWN },
+      { EL_TUBE_HORIZONTAL,	MV_LEFT | MV_RIGHT                   },
+      { EL_TUBE_VERT_LEFT,	MV_LEFT |            MV_UP | MV_DOWN },
+      { EL_TUBE_VERT_RIGHT,	          MV_RIGHT | MV_UP | MV_DOWN },
+      { EL_TUBE_HORIZ_UP,	MV_LEFT | MV_RIGHT | MV_UP           },
+      { EL_TUBE_HORIZ_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] != Feld[jx][jy])
+    {
+      i++;
+      if (tube_leave_directions[i][0] == -1)	/* should not happen */
+	break;
+    }
+
+    if (!(tube_leave_directions[i][1] & move_direction))
+      return MF_NO_ACTION;	/* tube has no opening in this direction */
+  }
 
   element = Feld[x][y];
 
-  switch(element)
+  switch (element)
   {
     case EL_LEERRAUM:
+      PlaySoundLevel(x, y, SND_EMPTY);
       break;
 
     case EL_ERDREICH:
+    case EL_SAND_INVISIBLE:
+    case EL_TRAP_INACTIVE:
+      Feld[x][y] = EL_LEERRAUM;
+      PlaySoundLevel(x, y, SND_SCHLURF);
+      break;
+
+    case EL_SP_BASE:
+    case EL_SP_BUG:
       Feld[x][y] = EL_LEERRAUM;
+      PlaySoundLevel(x, y, SND_SP_BASE);
       break;
 
     case EL_EDELSTEIN:
@@ -3574,47 +5283,93 @@ int DigField(struct PlayerInfo *player,
     case EL_EDELSTEIN_ROT:
     case EL_EDELSTEIN_LILA:
     case EL_DIAMANT:
-      RemoveField(x,y);
-      local_player->gems_still_needed -= (element == EL_DIAMANT ? 3 : 1);
+    case EL_SP_INFOTRON:
+    case EL_PEARL:
+    case EL_CRYSTAL:
+      RemoveField(x, y);
+      local_player->gems_still_needed -= (element == EL_DIAMANT ? 3 :
+					  element == EL_PEARL ? 5 :
+					  element == EL_CRYSTAL ? 8 : 1);
       if (local_player->gems_still_needed < 0)
 	local_player->gems_still_needed = 0;
       RaiseScoreElement(element);
       DrawText(DX_EMERALDS, DY_EMERALDS,
 	       int2str(local_player->gems_still_needed, 3),
 	       FS_SMALL, FC_YELLOW);
+      if (element == EL_SP_INFOTRON)
+	PlaySoundLevel(x, y, SND_SP_INFOTRON);
+      else
+	PlaySoundLevel(x, y, SND_PONG);
+      break;
+
+    case EL_SPEED_PILL:
+      RemoveField(x, y);
+      player->move_delay_value = MOVE_DELAY_HIGH_SPEED;
+      PlaySoundLevel(x, y, SND_PONG);
+      break;
+
+    case EL_ENVELOPE:
+      Feld[x][y] = EL_LEERRAUM;
+      PlaySoundLevel(x, y, SND_PONG);
+      break;
+
+    case EL_EXTRA_TIME:
+      RemoveField(x, y);
+      if (level.time > 0)
+      {
+	TimeLeft += 10;
+	DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FS_SMALL, FC_YELLOW);
+      }
+      PlaySoundStereo(SND_GONG, PSND_MAX_RIGHT);
+      break;
+
+    case EL_SHIELD_PASSIVE:
+      RemoveField(x, y);
+      player->shield_passive_time_left += 10;
       PlaySoundLevel(x, y, SND_PONG);
       break;
 
-    case EL_DYNAMIT_AUS:
-      RemoveField(x,y);
+    case EL_SHIELD_ACTIVE:
+      RemoveField(x, y);
+      player->shield_passive_time_left += 10;
+      player->shield_active_time_left += 10;
+      PlaySoundLevel(x, y, SND_PONG);
+      break;
+
+    case EL_DYNAMITE_INACTIVE:
+    case EL_SP_DISK_RED:
+      RemoveField(x, y);
       player->dynamite++;
-      RaiseScoreElement(EL_DYNAMIT);
+      RaiseScoreElement(EL_DYNAMITE_INACTIVE);
       DrawText(DX_DYNAMITE, DY_DYNAMITE,
 	       int2str(local_player->dynamite, 3),
 	       FS_SMALL, FC_YELLOW);
-      PlaySoundLevel(x,y,SND_PONG);
+      if (element == EL_SP_DISK_RED)
+	PlaySoundLevel(x, y, SND_SP_INFOTRON);
+      else
+	PlaySoundLevel(x, y, SND_PONG);
       break;
 
     case EL_DYNABOMB_NR:
-      RemoveField(x,y);
+      RemoveField(x, y);
       player->dynabomb_count++;
       player->dynabombs_left++;
-      RaiseScoreElement(EL_DYNAMIT);
-      PlaySoundLevel(x,y,SND_PONG);
+      RaiseScoreElement(EL_DYNAMITE_INACTIVE);
+      PlaySoundLevel(x, y, SND_PONG);
       break;
 
     case EL_DYNABOMB_SZ:
-      RemoveField(x,y);
+      RemoveField(x, y);
       player->dynabomb_size++;
-      RaiseScoreElement(EL_DYNAMIT);
-      PlaySoundLevel(x,y,SND_PONG);
+      RaiseScoreElement(EL_DYNAMITE_INACTIVE);
+      PlaySoundLevel(x, y, SND_PONG);
       break;
 
     case EL_DYNABOMB_XL:
-      RemoveField(x,y);
+      RemoveField(x, y);
       player->dynabomb_xl = TRUE;
-      RaiseScoreElement(EL_DYNAMIT);
-      PlaySoundLevel(x,y,SND_PONG);
+      RaiseScoreElement(EL_DYNAMITE_INACTIVE);
+      PlaySoundLevel(x, y, SND_PONG);
       break;
 
     case EL_SCHLUESSEL1:
@@ -3622,18 +5377,38 @@ int DigField(struct PlayerInfo *player,
     case EL_SCHLUESSEL3:
     case EL_SCHLUESSEL4:
     {
-      int key_nr = element-EL_SCHLUESSEL1;
+      int key_nr = element - EL_SCHLUESSEL1;
+
+      RemoveField(x, y);
+      player->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;
+    }
+
+    case EL_EM_KEY_1:
+    case EL_EM_KEY_2:
+    case EL_EM_KEY_3:
+    case EL_EM_KEY_4:
+    {
+      int key_nr = element - EL_EM_KEY_1;
 
-      RemoveField(x,y);
+      RemoveField(x, y);
       player->key[key_nr] = TRUE;
       RaiseScoreElement(EL_SCHLUESSEL);
-      DrawMiniGraphicExt(drawto,gc,
-			 DX_KEYS+key_nr*MINI_TILEX,DY_KEYS,
+      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,
+      DrawMiniGraphicExt(window, gc,
+			 DX_KEYS+key_nr*MINI_TILEX, DY_KEYS,
 			 GFX_SCHLUESSEL1+key_nr);
-      PlaySoundLevel(x,y,SND_PONG);
+      PlaySoundLevel(x, y, SND_PONG);
       break;
     }
 
@@ -3641,101 +5416,326 @@ int DigField(struct PlayerInfo *player,
       Feld[x][y] = EL_ABLENK_EIN;
       ZX = x;
       ZY = y;
-      DrawLevelField(x,y);
-      return(MF_ACTION);
+      DrawLevelField(x, y);
+      return MF_ACTION;
+      break;
+
+    case EL_SP_TERMINAL:
+      {
+	int xx, yy;
+
+	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;
+	  }
+	}
+
+	return MF_ACTION;
+      }
+      break;
+
+    case EL_BELT1_SWITCH_LEFT:
+    case EL_BELT1_SWITCH_MIDDLE:
+    case EL_BELT1_SWITCH_RIGHT:
+    case EL_BELT2_SWITCH_LEFT:
+    case EL_BELT2_SWITCH_MIDDLE:
+    case EL_BELT2_SWITCH_RIGHT:
+    case EL_BELT3_SWITCH_LEFT:
+    case EL_BELT3_SWITCH_MIDDLE:
+    case EL_BELT3_SWITCH_RIGHT:
+    case EL_BELT4_SWITCH_LEFT:
+    case EL_BELT4_SWITCH_MIDDLE:
+    case EL_BELT4_SWITCH_RIGHT:
+      if (!player->Switching)
+      {
+	player->Switching = TRUE;
+	ToggleBeltSwitch(x, y);
+      }
+      return MF_ACTION;
+      break;
+
+    case EL_SWITCHGATE_SWITCH_1:
+    case EL_SWITCHGATE_SWITCH_2:
+      if (!player->Switching)
+      {
+	player->Switching = TRUE;
+	ToggleSwitchgateSwitch(x, y);
+      }
+      return MF_ACTION;
+      break;
+
+    case EL_LIGHT_SWITCH_OFF:
+    case EL_LIGHT_SWITCH_ON:
+      if (!player->Switching)
+      {
+	player->Switching = TRUE;
+	ToggleLightSwitch(x, y);
+      }
+      return MF_ACTION;
+      break;
+
+    case EL_TIMEGATE_SWITCH_OFF:
+      ActivateTimegateSwitch(x, y);
+
+      return MF_ACTION;
+      break;
+
+    case EL_BALLOON_SEND_LEFT:
+    case EL_BALLOON_SEND_RIGHT:
+    case EL_BALLOON_SEND_UP:
+    case EL_BALLOON_SEND_DOWN:
+    case EL_BALLOON_SEND_ANY:
+      if (element == EL_BALLOON_SEND_ANY)
+	game.balloon_dir = move_direction;
+      else
+	game.balloon_dir = (element == EL_BALLOON_SEND_LEFT  ? MV_LEFT :
+			    element == EL_BALLOON_SEND_RIGHT ? MV_RIGHT :
+			    element == EL_BALLOON_SEND_UP    ? MV_UP :
+			    element == EL_BALLOON_SEND_DOWN  ? MV_DOWN :
+			    MV_NO_MOVING);
+
+      return MF_ACTION;
+      break;
+
+    case EL_SP_EXIT:
+      if (local_player->gems_still_needed > 0)
+	return MF_NO_ACTION;
+
+      player->LevelSolved = player->GameOver = TRUE;
+      PlaySoundStereo(SND_SP_EXIT, PSND_MAX_RIGHT);
       break;
 
     case EL_FELSBROCKEN:
+    case EL_BD_ROCK:
     case EL_BOMBE:
+    case EL_DX_SUPABOMB:
     case EL_KOKOSNUSS:
     case EL_ZEIT_LEER:
-      if (dy || mode==DF_SNAP)
-	return(MF_NO_ACTION);
+    case EL_SP_ZONK:
+    case EL_SP_DISK_ORANGE:
+    case EL_SPRING:
+      if (dy || mode == DF_SNAP)
+	return MF_NO_ACTION;
 
       player->Pushing = TRUE;
 
-      if (!IN_LEV_FIELD(x+dx,y+dy) || !IS_FREE(x+dx,y+dy))
-	return(MF_NO_ACTION);
+      if (!IN_LEV_FIELD(x+dx, y+dy) || !IS_FREE(x+dx, y+dy))
+	return MF_NO_ACTION;
 
       if (real_dy)
       {
-	if (IN_LEV_FIELD(jx,jy+real_dy) && !IS_SOLID(Feld[jx][jy+real_dy]))
-	  return(MF_NO_ACTION);
+	if (IN_LEV_FIELD(jx, jy+real_dy) && !IS_SOLID(Feld[jx][jy+real_dy]))
+	  return MF_NO_ACTION;
       }
 
       if (player->push_delay == 0)
 	player->push_delay = FrameCounter;
       if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-	  !tape.playing)
-	return(MF_NO_ACTION);
+	  !tape.playing && element != EL_SPRING)
+	return MF_NO_ACTION;
 
-      RemoveField(x,y);
+      RemoveField(x, y);
       Feld[x+dx][y+dy] = element;
 
-      player->push_delay_value = 2+RND(8);
+      if (element == EL_SPRING)
+      {
+	Feld[x+dx][y+dy] = EL_SPRING_MOVING;
+	MovDir[x+dx][y+dy] = move_direction;
+      }
+
+      player->push_delay_value = (element == EL_SPRING ? 0 : 2 + RND(8));
 
-      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);
+      DrawLevelField(x+dx, y+dy);
+      if (element == EL_FELSBROCKEN || element == EL_BD_ROCK)
+	PlaySoundLevel(x+dx, y+dy, SND_PUSCH);
+      else if (element == EL_KOKOSNUSS)
+	PlaySoundLevel(x+dx, y+dy, SND_KNURK);
+      else if (IS_SP_ELEMENT(element))
+	PlaySoundLevel(x+dx, y+dy, SND_SP_ZONKPUSH);
       else
-	PlaySoundLevel(x+dx,y+dy,SND_KLOPF);
+	PlaySoundLevel(x+dx, y+dy, SND_PUSCH);	/* better than "SND_KLOPF" */
       break;
 
     case EL_PFORTE1:
     case EL_PFORTE2:
     case EL_PFORTE3:
     case EL_PFORTE4:
-      if (!player->key[element-EL_PFORTE1])
-	return(MF_NO_ACTION);
+      if (!player->key[element - EL_PFORTE1])
+	return MF_NO_ACTION;
       break;
 
     case EL_PFORTE1X:
     case EL_PFORTE2X:
     case EL_PFORTE3X:
     case EL_PFORTE4X:
-      if (!player->key[element-EL_PFORTE1X])
-	return(MF_NO_ACTION);
+      if (!player->key[element - EL_PFORTE1X])
+	return MF_NO_ACTION;
+      break;
+
+    case EL_EM_GATE_1:
+    case EL_EM_GATE_2:
+    case EL_EM_GATE_3:
+    case EL_EM_GATE_4:
+      if (!player->key[element - EL_EM_GATE_1])
+	return MF_NO_ACTION;
+      if (!IN_LEV_FIELD(x + dx, y + dy) || !IS_FREE(x + dx, y + dy))
+	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_GATE);
+
+      break;
+
+    case EL_EM_GATE_1X:
+    case EL_EM_GATE_2X:
+    case EL_EM_GATE_3X:
+    case EL_EM_GATE_4X:
+      if (!player->key[element - EL_EM_GATE_1X])
+	return MF_NO_ACTION;
+      if (!IN_LEV_FIELD(x + dx, y + dy) || !IS_FREE(x + dx, y + dy))
+	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_GATE);
+
+      break;
+
+    case EL_SWITCHGATE_OPEN:
+    case EL_TIMEGATE_OPEN:
+      if (!IN_LEV_FIELD(x + dx, y + dy) || !IS_FREE(x + dx, y + dy))
+	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_GATE);
+
+      break;
+
+    case EL_SP_PORT1_LEFT:
+    case EL_SP_PORT2_LEFT:
+    case EL_SP_PORT1_RIGHT:
+    case EL_SP_PORT2_RIGHT:
+    case EL_SP_PORT1_UP:
+    case EL_SP_PORT2_UP:
+    case EL_SP_PORT1_DOWN:
+    case EL_SP_PORT2_DOWN:
+    case EL_SP_PORT_X:
+    case EL_SP_PORT_Y:
+    case EL_SP_PORT_XY:
+      if ((dx == -1 &&
+	   element != EL_SP_PORT1_LEFT &&
+	   element != EL_SP_PORT2_LEFT &&
+	   element != EL_SP_PORT_X &&
+	   element != EL_SP_PORT_XY) ||
+	  (dx == +1 &&
+	   element != EL_SP_PORT1_RIGHT &&
+	   element != EL_SP_PORT2_RIGHT &&
+	   element != EL_SP_PORT_X &&
+	   element != EL_SP_PORT_XY) ||
+	  (dy == -1 &&
+	   element != EL_SP_PORT1_UP &&
+	   element != EL_SP_PORT2_UP &&
+	   element != EL_SP_PORT_Y &&
+	   element != EL_SP_PORT_XY) ||
+	  (dy == +1 &&
+	   element != EL_SP_PORT1_DOWN &&
+	   element != EL_SP_PORT2_DOWN &&
+	   element != EL_SP_PORT_Y &&
+	   element != EL_SP_PORT_XY) ||
+	  !IN_LEV_FIELD(x + dx, y + dy) ||
+	  !IS_FREE(x + dx, y + dy))
+	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_GATE);
+      break;
+
+    case EL_TUBE_CROSS:
+    case EL_TUBE_VERTICAL:
+    case EL_TUBE_HORIZONTAL:
+    case EL_TUBE_VERT_LEFT:
+    case EL_TUBE_VERT_RIGHT:
+    case EL_TUBE_HORIZ_UP:
+    case EL_TUBE_HORIZ_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_CROSS,	MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
+	  { EL_TUBE_VERTICAL,	                     MV_UP | MV_DOWN },
+	  { EL_TUBE_HORIZONTAL,	MV_LEFT | MV_RIGHT                   },
+	  { EL_TUBE_VERT_LEFT,	          MV_RIGHT | MV_UP | MV_DOWN },
+	  { EL_TUBE_VERT_RIGHT,	MV_LEFT            | MV_UP | MV_DOWN },
+	  { EL_TUBE_HORIZ_UP,	MV_LEFT | MV_RIGHT |         MV_DOWN },
+	  { EL_TUBE_HORIZ_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 (!(tube_enter_directions[i][1] & move_direction))
+	  return MF_NO_ACTION;	/* tube has no opening in this direction */
+      }
       break;
 
     case EL_AUSGANG_ZU:
     case EL_AUSGANG_ACT:
-      /* Tür ist (noch) nicht offen! */
-      return(MF_NO_ACTION);
+      /* door is not (yet) open */
+      return MF_NO_ACTION;
       break;
 
     case EL_AUSGANG_AUF:
-      if (mode==DF_SNAP)
-	return(MF_NO_ACTION);
-
-      PlaySoundLevel(x,y,SND_BUING);
+      if (mode == DF_SNAP)
+	return MF_NO_ACTION;
 
-      /*
-      player->gone = TRUE;
-      PlaySoundLevel(x,y,SND_BUING);
-
-      if (!local_player->friends_still_needed)
-	player->LevelSolved = player->GameOver = TRUE;
-      */
+      PlaySoundLevel(x, y, SND_BUING);
 
       break;
 
     case EL_BIRNE_AUS:
       Feld[x][y] = EL_BIRNE_EIN;
       local_player->lights_still_needed--;
-      DrawLevelField(x,y);
-      PlaySoundLevel(x,y,SND_DENG);
-      return(MF_ACTION);
+      DrawLevelField(x, y);
+      PlaySoundLevel(x, y, SND_DENG);
+      return MF_ACTION;
       break;
 
     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);
+      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;
 
     case EL_SOKOBAN_FELD_LEER:
@@ -3744,33 +5744,35 @@ int DigField(struct PlayerInfo *player,
     case EL_SOKOBAN_FELD_VOLL:
     case EL_SOKOBAN_OBJEKT:
     case EL_SONDE:
-      if (mode==DF_SNAP)
-	return(MF_NO_ACTION);
+    case EL_SP_DISK_YELLOW:
+    case EL_BALLOON:
+      if (mode == DF_SNAP)
+	return MF_NO_ACTION;
 
       player->Pushing = TRUE;
 
-      if (!IN_LEV_FIELD(x+dx,y+dy)
-	  || (!IS_FREE(x+dx,y+dy)
+      if (!IN_LEV_FIELD(x+dx, y+dy)
+	  || (!IS_FREE(x+dx, y+dy)
 	      && (Feld[x+dx][y+dy] != EL_SOKOBAN_FELD_LEER
 		  || !IS_SB_ELEMENT(element))))
-	return(MF_NO_ACTION);
+	return MF_NO_ACTION;
 
       if (dx && real_dy)
       {
-	if (IN_LEV_FIELD(jx,jy+real_dy) && !IS_SOLID(Feld[jx][jy+real_dy]))
-	  return(MF_NO_ACTION);
+	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);
+	if (IN_LEV_FIELD(jx+real_dx, jy) && !IS_SOLID(Feld[jx+real_dx][jy]))
+	  return MF_NO_ACTION;
       }
 
       if (player->push_delay == 0)
 	player->push_delay = FrameCounter;
       if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-	  !tape.playing)
-	return(MF_NO_ACTION);
+	  !tape.playing && element != EL_BALLOON)
+	return MF_NO_ACTION;
 
       if (IS_SB_ELEMENT(element))
       {
@@ -3780,127 +5782,134 @@ int DigField(struct PlayerInfo *player,
 	  local_player->sokobanfields_still_needed++;
 	}
 	else
-	  RemoveField(x,y);
+	  RemoveField(x, y);
 
 	if (Feld[x+dx][y+dy] == EL_SOKOBAN_FELD_LEER)
 	{
 	  Feld[x+dx][y+dy] = EL_SOKOBAN_FELD_VOLL;
 	  local_player->sokobanfields_still_needed--;
 	  if (element == EL_SOKOBAN_OBJEKT)
-	    PlaySoundLevel(x,y,SND_DENG);
+	    PlaySoundLevel(x, y, SND_DENG);
 	}
 	else
 	  Feld[x+dx][y+dy] = EL_SOKOBAN_OBJEKT;
       }
       else
       {
-	RemoveField(x,y);
+	RemoveField(x, y);
 	Feld[x+dx][y+dy] = element;
       }
 
-      player->push_delay_value = 2;
+      player->push_delay_value = (element == EL_BALLOON ? 0 : 2);
 
-      DrawLevelField(x,y);
-      DrawLevelField(x+dx,y+dy);
-      PlaySoundLevel(x+dx,y+dy,SND_PUSCH);
+      DrawLevelField(x, y);
+      DrawLevelField(x+dx, y+dy);
+      if (element == EL_BALLOON)
+	PlaySoundLevel(x+dx, y+dy, SND_SCHLURF);
+      else
+	PlaySoundLevel(x+dx, y+dy, SND_PUSCH);
 
       if (IS_SB_ELEMENT(element) &&
 	  local_player->sokobanfields_still_needed == 0 &&
-	  game_emulation == EMU_SOKOBAN)
+	  game.emulation == EMU_SOKOBAN)
       {
 	player->LevelSolved = player->GameOver = TRUE;
-	PlaySoundLevel(x,y,SND_BUING);
+	PlaySoundLevel(x, y, SND_BUING);
       }
 
       break;
 
-    case EL_MAULWURF:
     case EL_PINGUIN:
     case EL_SCHWEIN:
     case EL_DRACHE:
       break;
 
     default:
-      return(MF_NO_ACTION);
-      break;
+      return MF_NO_ACTION;
   }
 
   player->push_delay = 0;
 
-  return(MF_MOVING);
+  return MF_MOVING;
 }
 
-BOOL SnapField(struct PlayerInfo *player, int dx, int dy)
+boolean SnapField(struct PlayerInfo *player, int dx, int dy)
 {
   int jx = player->jx, jy = player->jy;
   int x = jx + dx, y = jy + dy;
 
-  if (player->gone || !IN_LEV_FIELD(x,y))
-    return(FALSE);
+  if (!player->active || !IN_LEV_FIELD(x, y))
+    return FALSE;
 
   if (dx && dy)
-    return(FALSE);
+    return FALSE;
 
   if (!dx && !dy)
   {
     player->snapped = FALSE;
-    return(FALSE);
+    return FALSE;
   }
 
   if (player->snapped)
-    return(FALSE);
+    return FALSE;
 
   player->MovDir = (dx < 0 ? MV_LEFT :
 		    dx > 0 ? MV_RIGHT :
 		    dy < 0 ? MV_UP :
 		    dy > 0 ? MV_DOWN :	MV_NO_MOVING);
 
-  if (!DigField(player, x,y, 0,0, DF_SNAP))
-    return(FALSE);
+  if (!DigField(player, x, y, 0, 0, DF_SNAP))
+    return FALSE;
 
   player->snapped = TRUE;
-  DrawLevelField(x,y);
+  DrawLevelField(x, y);
   BackToFront();
 
-  return(TRUE);
+  return TRUE;
 }
 
-BOOL PlaceBomb(struct PlayerInfo *player)
+boolean PlaceBomb(struct PlayerInfo *player)
 {
   int jx = player->jx, jy = player->jy;
   int element;
 
-  if (player->gone || player->MovPos)
-    return(FALSE);
+  if (!player->active || player->MovPos)
+    return FALSE;
 
   element = Feld[jx][jy];
 
-  if ((player->dynamite==0 && player->dynabombs_left==0) ||
-      element==EL_DYNAMIT || element==EL_DYNABOMB || element==EL_EXPLODING)
-    return(FALSE);
+  if ((player->dynamite == 0 && player->dynabombs_left == 0) ||
+      IS_ACTIVE_BOMB(element) || element == EL_EXPLODING)
+    return FALSE;
 
   if (element != EL_LEERRAUM)
     Store[jx][jy] = element;
 
   if (player->dynamite)
   {
-    Feld[jx][jy] = EL_DYNAMIT;
+    Feld[jx][jy] = EL_DYNAMITE_ACTIVE;
     MovDelay[jx][jy] = 96;
     player->dynamite--;
     DrawText(DX_DYNAMITE, DY_DYNAMITE, int2str(local_player->dynamite, 3),
 	     FS_SMALL, FC_YELLOW);
-    DrawGraphicThruMask(SCREENX(jx),SCREENY(jy),GFX_DYNAMIT);
+    if (IN_SCR_FIELD(SCREENX(jx), SCREENY(jy)))
+    {
+      if (game.emulation == EMU_SUPAPLEX)
+	DrawGraphic(SCREENX(jx), SCREENY(jy), GFX_SP_DISK_RED);
+      else
+	DrawGraphicThruMask(SCREENX(jx), SCREENY(jy), GFX_DYNAMIT);
+    }
   }
   else
   {
-    Feld[jx][jy] = EL_DYNABOMB;
-    Store2[jx][jy] = EL_SPIELER1 + player->nr;	/* for DynaExplode() */
+    Feld[jx][jy] = EL_DYNABOMB_ACTIVE_1 + (player->element_nr - EL_SPIELER1);
     MovDelay[jx][jy] = 96;
     player->dynabombs_left--;
-    DrawGraphicThruMask(SCREENX(jx),SCREENY(jy),GFX_DYNABOMB);
+    if (IN_SCR_FIELD(SCREENX(jx), SCREENY(jy)))
+      DrawGraphicThruMask(SCREENX(jx), SCREENY(jy), GFX_DYNABOMB);
   }
 
-  return(TRUE);
+  return TRUE;
 }
 
 void PlaySoundLevel(int x, int y, int sound_nr)
@@ -3909,30 +5918,33 @@ void PlaySoundLevel(int x, int y, int sound_nr)
   int volume, stereo;
   int silence_distance = 8;
 
-  if ((!sound_simple_on && !IS_LOOP_SOUND(sound_nr)) ||
-      (!sound_loops_on && IS_LOOP_SOUND(sound_nr)))
+  if ((!setup.sound_simple && !IS_LOOP_SOUND(sound_nr)) ||
+      (!setup.sound_loops && IS_LOOP_SOUND(sound_nr)))
     return;
 
-  if (!IN_LEV_FIELD(x,y) ||
+  if (!IN_LEV_FIELD(x, y) ||
       sx < -silence_distance || sx >= SCR_FIELDX+silence_distance ||
       sy < -silence_distance || sy >= SCR_FIELDY+silence_distance)
     return;
 
   volume = PSND_MAX_VOLUME;
+
 #ifndef MSDOS
-  stereo = (sx-SCR_FIELDX/2)*12;
+  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;
+  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
 
-  if (!IN_SCR_FIELD(sx,sy))
+  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;
+    int dx = ABS(sx - SCR_FIELDX/2) - SCR_FIELDX/2;
+    int dy = ABS(sy - SCR_FIELDY/2) - SCR_FIELDY/2;
 
-    volume -= volume*(dx > dy ? dx : dy)/silence_distance;
+    volume -= volume * (dx > dy ? dx : dy) / silence_distance;
   }
 
   PlaySoundExt(sound_nr, volume, stereo, PSND_NO_LOOP);
@@ -3980,7 +5992,7 @@ void RaiseScoreElement(int element)
     case EL_KOKOSNUSS:
       RaiseScore(level.score[SC_KOKOSNUSS]);
       break;
-    case EL_DYNAMIT:
+    case EL_DYNAMITE_INACTIVE:
       RaiseScore(level.score[SC_DYNAMIT]);
       break;
     case EL_SCHLUESSEL:
@@ -3990,3 +6002,238 @@ void RaiseScoreElement(int element)
       break;
   }
 }
+
+/* ---------- new game button stuff ---------------------------------------- */
+
+/* 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)
+
+#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)
+
+static struct
+{
+  int x, y;
+  int gadget_id;
+  char *infotext;
+} gamebutton_info[NUM_GAME_BUTTONS] =
+{
+  {
+    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"
+  },
+  {
+    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"
+  }
+};
+
+void CreateGameButtons()
+{
+  int i;
+
+  for (i=0; i<NUM_GAME_BUTTONS; i++)
+  {
+    Pixmap gd_pixmap = pix[PIX_DOOR];
+    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;
+    }
+
+    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_pixmap, gd_x1, gd_y1,
+		      GDI_DESIGN_PRESSED, gd_pixmap, gd_x2, gd_y1,
+		      GDI_ALT_DESIGN_UNPRESSED, gd_pixmap, gd_x1, gd_y2,
+		      GDI_ALT_DESIGN_PRESSED, gd_pixmap, 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;
+  }
+}
+
+static void MapGameButtons()
+{
+  int i;
+
+  for (i=0; i<NUM_GAME_BUTTONS; i++)
+    MapGadget(game_gadget[i]);
+}
+
+void UnmapGameButtons()
+{
+  int i;
+
+  for (i=0; i<NUM_GAME_BUTTONS; i++)
+    UnmapGadget(game_gadget[i]);
+}
+
+static void HandleGameButtons(struct GadgetInfo *gi)
+{
+  int id = gi->custom_id;
+
+  if (game_status != PLAYING)
+    return;
+
+  switch (id)
+  {
+    case GAME_CTRL_ID_STOP:
+      if (AllPlayersGone)
+      {
+	CloseDoor(DOOR_CLOSE_1);
+	game_status = MAINMENU;
+	DrawMainMenu();
+	break;
+      }
+
+      if (level_editor_test_game ||
+	  Request("Do you really want to quit the game ?",
+		  REQ_ASK | REQ_STAY_CLOSED))
+      { 
+#ifndef MSDOS
+	if (options.network)
+	  SendToServer_StopPlaying();
+	else
+#endif
+	{
+	  game_status = MAINMENU;
+	  DrawMainMenu();
+	}
+      }
+      else
+	OpenDoor(DOOR_OPEN_1 | DOOR_COPY_BACK);
+      break;
+
+    case GAME_CTRL_ID_PAUSE:
+      if (options.network)
+      {
+#ifndef MSDOS
+	if (tape.pausing)
+	  SendToServer_ContinuePlaying();
+	else
+	  SendToServer_PausePlaying();
+#endif
+      }
+      else
+	TapeTogglePause();
+      break;
+
+    case GAME_CTRL_ID_PLAY:
+      if (tape.pausing)
+      {
+#ifndef MSDOS
+	if (options.network)
+	  SendToServer_ContinuePlaying();
+	else
+#endif
+	{
+	  tape.pausing = FALSE;
+	  DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
+	}
+      }
+      break;
+
+    case SOUND_CTRL_ID_MUSIC:
+      if (setup.sound_music)
+      { 
+	setup.sound_music = FALSE;
+	FadeSound(background_loop[level_nr % num_bg_loops]);
+      }
+      else if (sound_loops_allowed)
+      { 
+	setup.sound = setup.sound_music = TRUE;
+	PlaySoundLoop(background_loop[level_nr % num_bg_loops]);
+      }
+      break;
+
+    case SOUND_CTRL_ID_LOOPS:
+      if (setup.sound_loops)
+	setup.sound_loops = FALSE;
+      else if (sound_loops_allowed)
+	setup.sound = setup.sound_loops = TRUE;
+      break;
+
+    case SOUND_CTRL_ID_SIMPLE:
+      if (setup.sound_simple)
+	setup.sound_simple = FALSE;
+      else if (sound_status==SOUND_AVAILABLE)
+	setup.sound = setup.sound_simple = TRUE;
+      break;
+
+    default:
+      break;
+  }
+}