[zenorogue]

Regarding making geometry a hidden component: it, kind of, is a hidden component in HyperRogue. I mean, yeah, it is in the name. But people play HyperRogue without understanding what hyperbolic geometry is. They think it is a game taking place on a sphere, or a normal Euclidean map with some kind of fish-eye projection. On the other hand, I do not think it is really possible to hide it from someone who knows how these things work, as the perspective works very different in hyperbolic geometry.

Which is actually quite cool: while so-called "non-Euclidean" games do all they can to show how weird they are, the actual non-Euclidean geometry pretends to be normal (but actually it is way more weird).