Players travel through thirteen pseudo-3D style realms in a quest to retrieve keys that unlock other realms or special crowns. Each realm is populated by snakes, zombies and other monsters. Players may drop crosses to impede the monsters, or avail themselves of three special powers: freeze, protect, and confuse.
The game is named after one of the realms -- which is comprised of a series of Escher-like impossible mazes.
Originally self-published under the moniker Zombies!