Incredible work for a game jam! My only teensy, tiny complaints are that the ending felt abrupt (I wanted an outro!) and that the boss battle was cheeseable (pun not intended) by just wailing on it until it died and ignoring the puzzles in the room.
The game design was so clever - each little puzzle felt unique and thematic. I especially appreciated the way you showed wrong inputs in the steam escaping game by making the wrong plugs wiggle - that was an extremely elegant/grokkable touch! Having downtime in between to get story beats was great. It's definitely rare to finish a game jam game and have the story have been so interesting that you wish there was more story to hear!
The artwork was stunning and the audio was fantastic. Everything about this is so polished. Well done!