Up/Down arrows for forward and reverse thrust,
Left/Right arrows to rotate,
Space to fire missile.
Firing missiles uses matter, to collect more matter fly over the small balls of matter that come off asteroids you have shot.
If you run out of matter every missile you fire will damage your ship so be careful when you are getting low.
Warning ? your own missiles can harm your ship so watch out for missiles that miss their target!.
There is no score for destroying asteroids, the aim is just to survive as long as possible.