Beautiful visual style, I love the 3D effect when you wiggle the book, that was great. In general the book style worked incredibly well, this was probably my favorite choose-your-own-adventure-novel in video game form. Stuff like pasting missing pages or removing cards from the book, that was very fun and creative!
I couldn't make it to the end though, I kept getting sent to chapter -2 (I think I used the arrow keys where I wasn't supposed to, mostly around chapter 2, maybe you can reproduce that) and I have run out of bookmarks, so I can't start a new game. I got as far as the brain scrambler guy, and lost a couple of times against him (not sure if I could beat him, he really kept beating me hard).
Here's a screenshot how it looks for me right now
