First of all, this looks ridiculously good. Great work with lighting and shaders!
I didn't really enjoy the reloading mechanic. Though it might raise tension in theory, in fact it just slows the pacing of the game.
Also this game suffers from one of the deadly game design sins - "find one last thing in an open, dark area without hints or a map". You should really consider tweaking this. Add more enemies than the number you have to kill, make it so one or two of the last enemies teleport closer to the player or just make an arrow pointing to the right direction.
Overall - a solid entry!