I finished the game! Thanks so much for your help, CERU! ^^
That was a really fun game, I really really enjoyed it, and that's saying a lot because I normally don't like playing horror survival games. I'm very easily scared and I jumped more than once playing this game. XD The puzzles were nicely done and not too difficult to solve.
I'm not too sure what exactly happened at the end of the game... but using all the notes and pages to develop the back story and what's actually happening in the game was a nice add and I'd say it was effective enough.
By the way, I scored a Rank D, hahaha XD;;; Hey, it's still passing, right? ;_; Too bad I didn't get to unlock any of the extra cutscenes. Maybe I'll replay it to get a higher rank but right now I think my eyes are a little sore at all the dark tones, so I'll give it a try another time.