Definitely my favorite of the puzzle games this jam and honestly of most jams I've done. It had an interesting setup and some interesting puzzles with little tidbits keeping me searching for a way to break all of them.
Especially with the cube room and all the time I spent there, was quite a lot of fun seeing what I could bug out with all the physics objects. There were quite a lot of times that I just spent all my time looking through all the rooms, checking all the walls, checking with the cube etc. etc.. Lots of fun with that.
One thing that was definitely nice was the fact that the character controller gave a lot of interesting mobility options compared to what I expected. Though, not a lot of situations to use it, since it is a puzzle game. But it was interesting to see nonetheless.
Overall though an absolutely incredible puzzle game in my opinion. Simple game design with an interesting story and narration to keep it going.