Oh wow, this was really chilling. I love the touch of realism here - it's scary because it's real. The art is very well done. The stalker is very unnerving!
I played through a couple of times to experiment with the sanity and health bars. The second time I was relieved to get a "good" ending - and then realize it wasn't so good after all, which really brought home that emotional impact.
Very well done!