I really liked the combat, but I think that the death screams are funny not horrifying.
Would be nice if you kill them on the body their screams would be more frantic, like if they would be actually hurt to death and not like punched in the abdomen.
If you wanna make the player feel more tunnelvisioned or claustrophobic, you could make the flashlight tighter, would play into making the player go slower checking corners and more careful.