The camera is very unwieldy, it almost gave me motion sickness. I think the atmosphere of the game was very strong (besides the slightly goofy spider model). Speaking of the spiders, I only saw two in the entire game? There should have been a few more I think to make the maze feel less empty. I wasn't entirely sure how I finished the game, as I never saw the button I was supposed to press, the door just let me in all of a sudden.
I'd be interested to see where this goes, since it looks like you're planning a part 2. Keep at it!