Since there is a flashlight mechanic, I'd suggest maybe removing the circle of light around the player or at least make it smaller, it would make the game more tense as you have to check behind you all the time.
The gun is also really piddly like a pea shooter, it's lacking game feel.
I wasn't entirely sure how the mechanics with ammo worked either, I just shot enemies and sometimes ammo comes back, idk.
The enemies are also really easy to kill, I had a horde of like 10-15 at one point, and killed them easily. The boss is a challenge, but he's just a bullet sponge, nothing really special about it it seems.
the atmosphere of the setting was nice though and fit the theme well!
it has some potentially mechanics here, you just really need to add some juice to the game.