The game is cleared when all the stars are taken. The cracked floor disappears when you pass over it, so you can only pass through it once.
To clear the level, you must destroy all the UFOs while avoiding falling bombs and blocks. Blocks cannot be destroyed by your own bullets, but will disappear if hit by an enemy bomb.
Place the arrow, change the direction of the car, and pass all the flags to clear the game. If the car goes off-screen or hits a rock, it is a failure. If the car hits a wall, it will flip, but the wall will disappear.