Great game! The first time I noticed the poster changing gave me the chills, and the ending was super creepy. Well done!
Oh, my. I brought up the poster just once and totally missed it. Didn't think it would give me such chills. Replayed it just to see this and it was worth it. Every chilling occurrence still gives me chills. This is a masterpiece.
For some reason, the poster made me think of Silent Hill 2 with Mary's letter, and how it will eventually go blank after a certain part of the game. That's why I had the idea to keep looking at it throughout.