Standard vertical shoot ’em up. You control a surrealistic space fighter, fighting just as surrealistic enemies. Power-up capsules alters the ship’s shape, weapons, and makes it larger. There are sixteen levels with a giant enemy at the end of each.
Pick power-up capsules until you’ve become “Kues”. Next, do not pick any more capsules until you’ve shrunk to “Zugau”. Then, start picking them up again and you will enter another branch on the “tree of evolution”. At the top of this tree, you will be “Deame”. If you get hit, you become “Black Deame”, and are invulnerable to shots. This will last as long as you pick power-up capsules.