The player character has been transformed into a ball by an evil scientist and has to roll his way through various mazes also designed by that scientist if he hopes to survive. His goal is to roll his marble around the level, collecting items and gold (in order to buy keys and other items at shops) in order to eventually get to the level's exit.

Obstacles, items and special tiles include monsters, keys, locks, trampolines, acid to destroy some walls, and more.