A really good puzzle game that plays well on the jam's theme. I also loved the text messages along the side - it really helped to add some personality and humour. Regarding your questions for feedback:
1)I thought they were a good balance of easy/hard, with a good difficulty curve as the game progresses.
2) I didn't spot any bugs/glitches whilst playing.
3) Everything was intuitive and logical.
4) I really enjoy the minimalist style, and all of the assets fit the game's aesthetic really well.
Kudos for including music as well. The only improvement I would suggest is maybe having the assets lock to the grid when moving, just to prevent any fiddly overlaps, and a current/needed room temperature gauge would save having to click on the door periodically. Otherwise, a very solid and enjoyable game that I would love to see more levels for. Great job!