"w" for Mars to go up, "s" for Mars to go down.        "up arrow" for Earth to go up, "down arrow" for Earth to go down.

There are wormholes in this game. If you hit the asteroid into the black hole on your side,it will come out the white hole on the oppisite side.     Satellites will explode if they are hit with the asteroid. The satellites will reappear after a certian amount of time.