A 1984 ColecoVision
game inspired by the art of M. C. Escher
Players are asked to help the Gleebs, "amoeba-like creatures"
, escape a dimension of paradoxes
through a series of Magic Mirrors
. Gameplay alternates between two screens: a strange loop of ever-descending staircases, and a cube whose near and far edges criss-cross
. On the stairs, all Gleebs must be made to collide and form a single Gleeb
to pass through the mirror, while on the cube, they must be split up to pass through the mirror individually.