I like the graphical presentation. The UI and environment look quite nice. I don't like the way you've animated your movement and turning. The acceleration in the animation makes it susceptible to causing motion sickness for viewers. This is harder to notice when you're playing it or if you don't get motion sickness, but it's something I had to fix in mine.
I'm not a massive arachnophobe, but jeeze, the dead spiders looming out the dark is creepy as. Not necessarily a bad thing. Just creepy.
The combat is simple, but functional; obviously some audio or screen effects might make it feel a bit more satisfying. I love the exploration bonus for healing, it makes planning how you map out the maze a more interesting decision.
The game over screen is nice. I'll never know what the win screen was, because that creeps the heck out of me.
Overall, very complete feeling, well done!