void add_broken_brick_piece(Tile* tile, float x, float y, float xm, float ym);
void add_bouncy_brick(float x, float y);
void add_bad_guy(float x, float y, BadGuyKind kind);
void add_broken_brick_piece(Tile* tile, float x, float y, float xm, float ym);
void add_bouncy_brick(float x, float y);
void add_bad_guy(float x, float y, BadGuyKind kind);