This article will give you a complete walkthrough. Spoilers containing. All files’ location included. No text commentary because I consider screenshots are clear enough. Of course, questions are welcome.
Part 1 : Awake (I've placed picked the doll twice, never mind. )
Part 2 : Red.
Part 3 : Blue.
Part 4: Escape.
That's all for the escape part. Inside the game, there're 10 documents to find.
Doesn't effect anything whether you collect them or not.