Very cute aesthetic, I love the character sprites and the voice acting was a nice touch. I had a good laugh when the game told me I apparently didn't know any Polish and had to go get a book for it. And also when I gave the man echolocation book.
I feel however that there should be a weak small omni-light at the player when the flashlight is on as when you walk in any other direction than forwards almost entire screen is pitch black and you won't even know if you got stuck on some geometry.
Also you should have a look at your movement/jumping/gravity code as you can climb walls by spamming space and walking at a wall. I was able to skip the echolocation book with that by climbing over the wall(even if it was weirdly tall). I also got to the top of the center room which doesn't feel intended.
Overall it has a very cute aesthetic,a well cradted atmothpere with the music and sound, and a nice idea of finding books to solve problems. It could however use some more polish and attention to details as map elements sometimes float in the air.
Good job and best of luck on future projects ♥
