Shoot as many asteroids as possible while avoiding being destroyed by them.
- Shoot asteroids! Shooting a large one will split into two medium-sized ones, shooting a medium asteroid will split into two small ones, then shooting a small asteroid will destroy it.
- Being hit by an asteroid will cost the player a ship and the game will end when there are no more ships left in reserve.
- An extra ship is awarded at 5000 points.
- Along with turning, the player can also thrust their ship around the screen to avoid asteroids.
- Use any key (Z, X and arrow keys) to start a game.
- Use the left/right arrow keys to turn ship and the up arrow key to thrust.
- Use the Z button to shoot.
- Use the Escape or Enter keys to pause the game.