SPOILERS:
Gotten 4 endings so far! One for Information, one for escape, one for double murder and escape, and one for a deathloop.
Still investigating, wondering if there's a way to the chest, the relevance of the dancing sketch outside the window, and the strange clearing to the south that I can see while wall phasing.
Update:
Hmm, the window sketches are your death or restart count, to a limit. Cant find any way to interact with it still though.