Your mission: eliminate the Space Monsters by racing your Spaceman along the floors of a giant girder structure. Climb up or down ladders from floor to floor, or leap through the holes for a quick descent, but don't let the Monsters attack your Spaceman! If you should defeat one of the Monster hordes, a more dangerous attack will follow!

Your mission: eliminate the Space Monsters by racing your Spaceman along the floors of a giant girder structure. Climb up or down ladders from floor to floor, or leap through the holes for a quick descent, but don't let the Monsters attack your Spaceman! If you should defeat one of the Monster hordes, a more dangerous attack will follow!