Hey glad you liked it! For the classroom part it was a bit messy, you should find a poster that indicates the number of notebooks remaining. There are 4 classrooms I believe, one of which is to the opposite direction of the exit. There are also books hiding in desks so it might be difficult to find. If you didn't collect all books, you're designed to be stucked in a loop, so you must find everything to go to the exit.
Thank you for playing my game!