I really like the concept, it is incredibly awesome. Only genius could find that idea. (now you must understand that I got the same :P ).
I like your aesthetic. The level design is progressive, and not too challenging for a jam.
You MUST take the time to put sfx and music, it's crucial, without it can feel empty and cold. There is already a good atmosphere, with just 4 audios : background music, jump & exit & push sounds, it could add a lot.
That's a great game, it deserves more notes !