Great palette choices and in game graphics. Loved the humour, the brain boggling part made me laugh out loud. That transition between the book-world and the real-world where you just casually throw out a full screen hblank scrolling shimmer - love how suitably underplayed it was. "Oh what, this?"
I look forward to playing more. Probably the only constructive criticisms I have are a) I do feel it gets very expansive quickly which without a map, is confusing and b) that your title screen maybe slightly undersells the game inside? But that's a nice problem to have!