Thanks so much for making this game! I had a lot of fun trying to beat it as fast as possible hahaha. Here is my best speedrun!
I was also thinking about how this would work for a 3D game like an FPS or 3PS. Obviously you would always have your character visible because the camera focuses it, but the idea of switching between what's visible and what's not would be very interesting. I'm thinking something like superhot where the enemies, scenery, weapons, and/or bullets are only visible one at a time would be pretty interesting.