Oh man, this was actually such a cool game. I loved a lot about it, but I do have three critiques:
One, I initially passed over this game a few times because the cover image didn't really grab me. Maybe it's just me, take that with a grain of salt.
Two, I think my biggest complaint while playing the game would be the camera controls. They were mostly alright, but some of the behavior felt clunky and difficult. I didn't like that I couldn't look up while flat on the floor (though admittedly it makes sense lol), and the way the camera "collided" with the walls and stuff made it difficult to see what I was doing while navigating tight spaces. In a game about navigating tight spaces, I'd consider polishing that if possible.
Three, I really wish you played the main menu music in the actual game, maybe on the final level (or heck, all the levels). It's so epic and cool, and I only got to hear 5 seconds of it.
But overall, I think this is an innovative and fun mechanic, and I love that way it's executed! I think you've got a really special game here. Awesome job!