This game certainly gives a horror vibe, I love how you have to stand still to aim. The way your sights shake is a really nice touch. I think it would be better if you didn't have to hold down E and then press R to reload, it would do just fine with just pressing R, expecially since zombies eat bullets like they were candies (9 to kill a zombie and the gun holds only 6!). Also It would be nice if interactable objects had some kind of outline or at least didn't merge with the backgroud so well.
Good work! I want to see more of this in the future!