you've set a nice tone with the visuals and audio while i feel you could have helped the player enjoy it a little more, somehow.
ie, your tip on the project page eludes to a goal but, for example, what if there was a "drip... drip... drip" that got louder as we got closer to it to let us know we were getting warmer vs what felt like being forced to explore every possible option (i gave up after ~5-6 tries and just took care of my business in whatever room i happened to be in :) ).
and, if there was an in-game assist, my apologies and can only blame myself for not turning out the lights while i played.
good fun and well-presented, tho. thanks for sharing :)