This is a very nicely focused game. Conceptually it's all strong, everything made sense to me, it's thematic and the perfect length.
Like others have said, the movement controller needs a little bit of love, I did find myself trying to move backwards and strafe quite often, and that's a tough habit to break. The perspective is very narrow, and while it's not 'traditional', it didn't matter in this game, not that a crawler about AI particularly traditional!
I enjoyed this alot, it was fun playing around with the various abilities and I think you made a very wise decision to err on the side of caution in regards to difficulty. It made for a really pleasant experience.
Thank you!