I LOVE THIS GAME!
Unfortunately I'm still missing one of the books, but I'll definitely come back to find it later.
Here's a list with some things that I found. I wouldn't classify all of them as bugs, but I'm mentioning all that I found just in case. I made a video showing this points to add context.
01. The scenes of HYPNIC JERK SOFTWARE & Slide Game screen show the final scene for one or two frames. I exaggerated that in the edition.
02. The hand at the main menu appears at a different place. I also exaggerated that in the edition.
03. The sliding sound is reproduced indefinitely just after falling and changing to other scene. It's stopped after another sliding.
04. The character starts doing the pushing animations on immovable objects like carts or stones. After some frames it stops.
05. While holding a monkey's head and falling in a tile where there was a bridge, the "Put down" message appears and it stays there.
06. It's possible to raise the saving icon again and again until it disappears while moving around scenes.
07. Softlock#1: One of the stones that blocks the path suddenly moves after entering to the new scene. If you keep walking and that area isn't solved it's over.
08. There's a turtle hidden and you can mount it.
09. Because of that turtle, it's possible to start the puzzle from a different place.
10. There's a tile of a wall where you can step (I don't know if this is the only one).
11. Softlock #2: There's one puzzle where you cannot go back, and there's no other way to return because the turtle isn't there.
12. When doing the "Delete save" option, it's not clear that it was deleted already. Some feedback would be appreciated.
13. The appearance of the "Read" message is inconsistent.
14. After reading a book, it's possible to re-read it, as if the book still were there.
15. Before the first saving point the obtained book is saved, is after the saving process when the book is lost.
Overall the game feels really good. The music and visuals are nice, there's a good amount of mechanics and they're pretty straightforward.
Amazing game. I kneel.