Great work!
Intense mood, great platforming.
1) I discovered that when you're standing still after actvating the key on B2 and standing on edge before jumping to electrified platform, character is moving little by little to the right, which was strange a bit.
2) Two encounters were creepy, but the third one was generic one. You should make different monsters for non-scary encounters. Because if a player encounters too much of the same monster in a simple visible and predictable way, the next time he encounters the same monster with scary popping out, the player won't get scared, he'll just think: "Oh well, I just butchered 20 of these in the last level, nothing too specal or scary". Thus I believe those scare monsters should be saved only for scary encounters and some other type of monsters should be made for simple ones (of course in the course of game all of them should change, but I think you know that).
3) Crate pushing is a little too slow even for a survival horror. And if you consider this to be an action game (which I don't) then it's way too slow.
4) Flame thrower feels more like a drill than a flamethrower, when it comes down to physics. Let the wooden crates ignite and enflame the crates around them to at least burn for a little of damage before the fire burns out, this would make the player feel that they are really using a flamethrower.
Those are the tweaks I'd make if this was my production, but I don't know whether all of them are good or not. Good luck with development, this one really looks promising!