The world starts with a door and a 3 number code (each number is 0-2) and you must figure out the randomly generated code to open the door.
Once you open the door the scene changes to a moon scene with a row of aliens between your vehicle and the lunar lander.
You have to move your vehicle to the lunar lander without touching the aliens. If you touch one, it turns red. When you arrive at the lander you win the game if you touched no aliens, and lose if any are red.