Curved Spaces is a flight simulator for multi-connected universes. Because light itself wraps around such a space, inhabitants see their universes contents repeating in a crystalline pattern, like a hall of mirrors but with no reflection.
Curved Spaces is intended for undergraduates and graduate students studying 3manifolds, and has also found use as a research tool in topology and cosmology. Recreational math enthusiasts may instead prefer Torus Games, which offers 3DMazes and 3DTic-Tac-Toe in a variety of multi-connected 3D spaces, along with games on multi-connected 2D surfaces.
Acknowledgment: Many thanks to Daniela Bigatti and Mark Bell for suggesting the tilt-to-steer interface.