Very nice entry! The art style, lighting, and music set the mood so well. Had me anxious about what was coming next.
I did get a little lost at times, even after reading some comments below. I think also I entered the final room but missed the collision area (is that possible?) so I left that room thinking it was a dead end and back tracked a lot.
Great thinking with the ending (don't want to write any spoilers in my post). :)