Very original entry!
Fun and short. I liked the choice with the music!
The intro where the mouse falls off was a nice touch, it felt weird in a good, cursed way.
I think it would benefit from a full screen setting (you can still add it via itch's "edit game" feature, there's a checkbox with "add fullscreen button" or something like that) though if that's by design it's cool too. I accidentally died via moving outside the game frame a few times, but I guess that's on me lol.
I also found it funny how the deal with the devil consisted of him letting you leave the game.
Pleasant entry overall, as others have said, it was well scoped!