Lovely little puzzle exploration game. I really liked the layout of the level(s)! I also like the general vibe and ambient sounds. In general the audio was a treat.
Some notes: As a player I would have preferred the keys to be auto pickup rather than pick-up on interact (though I suppose that also depends on taste?). While I was playing my mind was constantly drifting off to classic doom and picking up key cards, so that might be why.
Additionally: there is a small bug where you can click on the opening door again to re-play the animation, a simple bool check could fix that!
Would also have been nice to have some sort of victory fanfare at the end, though the jumping friends also made me very happy!
Wonderful job with the submission!