If you collect the power dot (pulsar), you can kill any of the three aliens, for a short time. In this game based, loosely, on the movie of the same name, you have to move through a maze (the halls of your ship in the manual), ala Pac-Man, collecting dots (destroying alien eggs).
Unfortunately, this game is currently available only in this version. If the game emulation is slow, try to speed it up by reloading this page without ads or choose another emulator from this table.