This comic mentions Flatland, which is an excellent book. Reading it might give some insight as to what observing our 3D world would be like from a 4D context. You have to extrapolate it from the idea of viewing a 2D world from our perspective. Honestly, it would probably be disturbing. You'd be able to see everything at once. Like, inside and outside of everything from all perspectives at once. I'll pass.

This probably won't help you figure out how to play Miegakure, though. Although I thought the comparison to FEZ was apropos.