Thank you so much for the detailed feedback, I really appreciate you taking the time to write this!
I tried to make the objectives more clear, by adding the "objective" text on top and added lights on objective items, but there's always room for improvements, and I had other ideas about it too but ran out of time, and of-course since it's a puzzle game I didn't want to give away too much in the objective. The "pillow" is actually a red book :D and the other bookcase has a books sorted by color and a red one is missing, giving a clue about the puzzle. The issue with this is only after submitting I saw on the web version the books are layered behind the bookshelf so it's not as obvious as I wanted it to be.
The stairs jumping also has a lot of room for improvements, for example not having collision from the bottom side.
The music in the library is a feature, but someone else also interpreted it as bug. First off music is supposed to fade out and not immediately stop, and the library level is supposed to start quiet (as it is), and then when you turn it on (via the lever) it's supposed to become "alive" and the music to start. When it's alive, it will always have music.
I didn't think about adding a squeeze-through animation, but yeah that will make it feel better.
thanks for playing and super happy that you enjoyed the game! and thanks for the super helpful tip on the wall sticking, I didn't think about it much when testing although obviously I did notice it, and was eventually going to look into it, and your tip goes a long way into fixing that.
Thanks again for the detailed feedback!