The keyboard controls described below maneuver your ship. Destroy as many asteroids as you can while avoiding collisions. Watch out for flying saucers armed with guided missles
If you warp into hyperspace, your ship will briefly disappear, then reappear on another part of the screen, gradually fading in. During this time the ship is invulnerable (safe). When your ship is destroyed, a new one will appear in the center of the screen. You can still maneuver and fire during this time so if you are in danger, you have a couple of seconds to get out of it.