class TileManager;
class MouseCursor;
-extern Surface* img_super_bkgd;
-extern Surface* tux_life;
-
extern SpriteManager* sprite_manager;
extern TileManager* tile_manager;
-extern Menu* contrib_menu;
-extern Menu* contrib_subset_menu;
extern Menu* main_menu;
extern Menu* game_menu;
-extern Menu* options_menu;
-extern Menu* load_game_menu;
extern MouseCursor* mouse_cursor;