I'm glad to see other people working on this kind of stuff. The old Descent games had a related—although more primitive—rendering engine that could be (ab)used to similar effect that was a lot of fun back in the mid-90's. Some of the home-brew levels back in the day exploited this for some pretty mind-bending overlapping non-euclidian level design.

As for myself, I've been working on a 2d-space combat game set on the surface of a Poincaré Disk as a hobby over the past few years, not sure i'll ever do anything with it for real, but it's fun.