Great but...
..it had a few problems. I really don't want to mark down a submission as good as this, but you HAVE to have a quality button. I've a mid-range computer and most of my time was spent with my character refusing to stop running; I died easily in level 1 because I couldn't turn fast enough. This sort of thing ruins games; there's no way I can complete level 1 because the character refuses to turn quickly enough.
If this was fixed; it'd easily be a ten. Brilliant concept, love the dark feel to it too. Really reminded me of 'Alien'. Obviously well made... I just hope you think about adding the quality button and upping our frame-rates!