Thanks! The hardest part about making this game has definitely been balancing the difficulty. While I do want the game to be pretty challenging, the thing that I'm having the most trouble with is figuring out how to teach players how things work without just straight up telling them. Like, I had to put the "I get angrier for every problem you get wrong" and "I hear every door you open" messages since people didn't seem to notice that getting problems wrong made Baldi faster or that opening doors attracted Baldi's attention.
You can't really hide from Baldi, but that's by design. Instead you need to try to mislead him by opening doors to places you aren't going, or getting far enough away so that once he reaches the last place he saw you, he still can't see you. If you can get Baldi in a situation like this, where he reaches his current destination, but can't see or hear you once he gets there, he is forced to wander randomly, giving you a chance to rest or try to get away as far as possible. Just keep in mind that if he sees you, that takes priority over any sounds he hears.
Also, yes, you're forced to get the last question of each notebook wrong in order to make Baldi faster each notebook. It would be no fun if you could just get all the answers right and Baldi wouldn't get any faster! :P