I really like the main mechanic behind this submission. Though I have seen some concepts that are a bit similar to this, I think you've executed it the best. The movement is feeling good, the shooting is fun, and the way you've done the lighting is amazing. You got a good aesthetic going and I really like the pixelated graphics.
I did notice however that there isn't a cooldown for shooting; I know you're meant to shoot fast but someone could click extremely fast (or use an autoclicker) and aim blindly, and they're bound to hit an enemy even without seeing them. Having a small shooting cooldown will force people to not shoot blindly and to use the flashlight more often.
This is a very well polished game, and it would be really cool to see this one expanded on!