WARNING, POSSIBLE SPOILERS:
I don't know if anyone found this before, but while I was playing the game yesterday, I found three symbols throughout the game, called Yellow Signs. When pressed, sentences appear on the screen while a red and black background "pulsates" while the background sounds from the abandoned cottage plays. To me they seem to be said from the "New Friend's" point of view, of him discovering the Yellow King's Play, and transforming into a horrific beast. Have anyone else found them? Are there more?