-extern st_level current_level;
-
-/* Function prototypes: */
-class Tile;
-
-Tile* gettile(float x, float y);
-void activate_bad_guys(st_level* plevel);
-int gameloop(const char * subset, int levelnb, int mode);
-void savegame(int slot);
-void loadgame(int slot);
-void slotinfo(char **pinfo, int slot);
-bool issolid(float x, float y);
-bool isbrick(float x, float y);
-bool isice(float x, float y);
-bool isfullbox(float x, float y);
-bool rectcollision(base_type* one, base_type* two);
-void drawshape(float x, float y, unsigned int c, Uint8 alpha = 255);
-unsigned int shape(float x, float y);
-void bumpbrick(float x, float y);