you really nailed the atmosphere on this. certain parts scared the shit out of me, and it was tense the whole time. it's too short to have any solid critiques. It seemed efficient enough in what it was trying tying to accomplish. I would be interested to see what you could do with a horror game that had a more fleshed out story.
Sorry it this appears random, but I am trying to build up a portfolio for editing game trailers, and I realized your game didn't have one. I took the liberty of making one for you, that you're free to use, if you are at all interested.