Haha no problem, thanks for making the game! This game has a lot of potential. If you add more levels, introduce a few new mechanics to keep the game-play fresh in later levels, and (maybe) add a level editor I can see this game taking off.
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.