Your level design is great, especially in the library, I loved exploring that place. Placing all those books must have been a pain, but that whole area was amazingly believable. Well done with that.
However, the believability gets lost when the actual layout of the house makes very little sense, and there are spelling and grammar issues abound in your notes, especially considering this is supposed to be a student studying under a highly regarded professor for a month. Also there were some floating decals in the beginning and misaligned walls around the main stairs. Basically, if you can make the entire story be as well done as the library, it'll be great!