You are Spaceman Spiff, held captive in a dungeon deep beneath the planet Zorg's surface. With your dematterizer, which temporarily swings chunks of matter into the 5th dimension, try to evade the guards as you collect teleporter charges to get to the next level -- and eventually to freedom. Tricks include dematterizing the floor beneath a guard's feet or a wall to get to secret passages (remember Loderunner?).