First of all I want to say that I really appreciate the monster designs and the art. The gore especially is really well done. The game sounds amazing as well, the gunplay feels very good and I like the item pickups.
I had a few issues with the progression though.
When starting the game doesn't tell you, that you have to activate the flashlight with F and I only figured that out after dying a few times due to running out of ammo while using the muzzle flash as a light source.
The other thing that I found really frustrating was the level design. It loops and twists all over the place, while looking the same very often. I found orientation really hard in this game and at some point I was completely lost only running along a wall and then I saw some floating triangles in the air and realized that I was out of bounds. At some point I must have gone through a corridor that just leads outside the level. I ran around aimlessly for a few more minutes and then the game just randomly booted me back to the main menu.
I guess that's the end ?
It would have been a lot more enjoyable if the level design was a bit tighter, maybe smaller even, with a clear and defined end goal.