This is very cool - great looking, great take on the theme, fun to play, enjoyable to control, does everything right. Though I could have done with a little bit more life (I didn't play it overlong but I didn't notice a way of getting it back - like an energy pack or something, which would have been nice) :P
It does have an overbearing kind of tension; that constant tick down of your life-support and system energy as you explore this maze - a great distillation of an overused horror trope.
Very well done :)