I really like the controls, very intuitive. I ran into a bug where if I was still in the mini-game for a book while the timer ran out, sometimes it would immediately pick to go up or down for me and I would leave the level. Other times it would let me keep doing the mini-game and once I completed it, it would let me keep picking books and doing their mini-games. It's unclear to me the difference between the three icons at the top. The books icon seems to represent how many books I've completed successfully, the brain might be the stage or level, I'm not sure, and the ladder I have no idea. I seem to have 317/130 but I'm not sure what that means or what I should do because of it. Very nice art and animations. Good job!