It's absolutely awesome, I'll be following the game after jam.
I got stuck several times and had to use the walkthrough, however, in general puzzles were satisfying. and on the right level of "difficultness". I love the art style of the escape room and the idea of moving items between windows.
From technical problems, I don't know if it's only my browser, but the book opened in a very small window and it took me some time to realize that I have to resize it. Also the game froze a couple of times and i had to refresh the tab.