I know I didn't finish so didn't see everything, but since it's something you're working on I have a few suggestions for balance!
-Perhaps a reward for getting the questions right? Too much of the game feels like a punishment, so it's a bit of a bummer answering the questions correctly doesn't provide any benefit (I don't really count NOT increasing the difficulty as a benefit).
-One of the biggest things that threw me off is how quickly it turned from tutorial to enemy-is-chasing-you-better-run-horror-game. The sudden flip is nice, but it was confusing he was teaching me how to play one second and running at me the next just for opening doors. The first time I played, I literaly ran right into him and killed myself because I thought he was my friend :-\
-I think the way he 'works' would be more intuitive if his motive was more understood. It could probably even be simple like "I'M A STRICT TEACHER MAN KEEP QUIET AND GET GOOD GRADES OR I'LL FIND YOU AND MAKE YOU".
That's about all that came to mind. Thanks again for making the game and sorry I suck haha. Cheers.