Took me a little over an hour. What a cute and clever game, as usual from you!
Some spoilers ahead
I don’t know how to make the empty newlines?
I loved the goose and egg clues, the shape of the letters hint at where you’re supposed to use the answer (once you understand what it is). The tree puzzle could’ve been clearer on what was expected, as I commented in a reply. Hated the domino puzzles, haha – I found them quite difficult and they required some thinking and trial and error, not really my thing! They felt a bit too much like padding. But other than that, most of it is really clear, it just flows from one thing to another and realising where a thing goes is satisfying. Also introducing concepts and expanding their usage – A+!
Do I see a Neverhood reference, with Big Bill?
Also, since I’m a cat lover and have a black cat myself, I particularly loved that part! Oh, and the notes in the alchemy book were hilarious, especially the repeated face doodle, like the knight is trying to get the expression right, and the S thing. So realistic, hahaha