>>348854707
You know a concept that could make this work would be to play on the whole "flatland" novel. Imagine this 2d platformer projected on various 3d objects where you are the single entity in the higher 3rd dimension and thus can interact with these game worlds in seemingly god like ways. You could pluck and transfer 2d elements from these different universes. You could even use 3d objects to intersect the game world for puzzles and what not.
Explore different 2d>3d projections on spheres, doughnuts, cubes, etc.

https://youtu.be/-wv0vxVRGMY

I think it's a difficult concept to pull off but could be interesting.