Play as a white, blobby protagonist and collect all the dots in each labyrinthian level. Collect and upgrade various power-ups littered about the maze, then deploy them to kill those green slimy monsters.
Powerups range from bombs and bullets to shoot enemies and walls, to teleporters and drills to navigate through the more twisty levels. You can even play with your friends and eliminate each other by entering 2-player mode.