Cool game!
The art is nice and consistent, and everything feels very thematically correct in and place. I really liked your implementation of the sanity mechanic, and but I think the tuning is a little off, so much so that I abandoned my first run when I got locked in half-a-dozen fights in a row and just assumed it was a bug and restarted.
The combat mechanic is excellent, really cool concept and it's such a great design that it's immediately clear what needs to be done without instruction.
I agree with some of the other comments regarding the flashlight. It is an excellent way to create friction and adversity, however it's mostly just an annoyance, I would prefer a lit environment with the 'scary' elements coming from elsewhere, but that's just my own preference.
The music was nice, but it possibly felt too nice and relaxing? The movement felt excellent, nice and snappy and I had no issues zipping around.
All in all it's a great entry, thank you.