In this game, based loosely on the movie of the same name, the player moves through a maze (the halls of your ship, according to the game's manual), à la Pac-Man, collecting dots (destroying alien eggs).
If you collect the power dot (pulsar), you can kill any of the three aliens, for a short time. When you grab the pulsar, it will next appear in one of two other spots.
A bonus item occasionally appears.
After you clear one level, you get a bonus game. You have to move up the screen to the prize at the top past several aliens, reminiscent of Freeway. You do not lose a life if you fail, but you only have eight seconds to reach the prize before you are off the the next, harder level.