+void TestIfGoodThingHitsBadThing(int, int, int);
+void TestIfBadThingHitsGoodThing(int, int, int);
+void TestIfPlayerTouchesBadThing(int, int);
+void TestIfPlayerRunsIntoBadThing(int, int, int);
+void TestIfBadThingTouchesPlayer(int, int);
+void TestIfBadThingRunsIntoPlayer(int, int, int);
+void TestIfFriendTouchesBadThing(int, int);
+void TestIfBadThingTouchesFriend(int, int);
+void TestIfBadThingTouchesOtherBadThing(int, int);
+void KillPlayer(struct PlayerInfo *);
+void BuryPlayer(struct PlayerInfo *);
+void RemovePlayer(struct PlayerInfo *);
+boolean SnapField(struct PlayerInfo *, int, int);
+boolean DropElement(struct PlayerInfo *);
+
+void InitPlayLevelSound();
+void PlayLevelSound_EM(int, int, int, int);