Interesting game! Looks great.
Maybe add more some effect when you hit an enemy? I see that there is red blinking but that's not very noticeble an I don't know if I hit him and not someone else.
Another nice thing would be automatically hiding after shooting if you were hiding before you started to aim. And maybe making pressing Down while aiming not just stop aiming but hide as well. Be I dunno, maybe I'm just lazy
Was kind of lost in the factory map at first, aiming in the windows didn't seem very obvious.
Encountered a bug when my cursor became invisible after the game ended and didn't come back, had to refresh the page.