I really like the work you did with the atmosphere. The bat shotgun (batgun?) is a really interesting concept and I like how you should think ahead on how you should use your resources, bullets are scars and melee is a nice option to use against lesser enemies and preserve the bullets and grenade for the more dangerous encounters.
I have a critique on the Night Vision. I think it slows down the pace because the N key is difficult to reach, I would have put the Night Vision key near the interact button. Other than this aspect, I really enjoy the concept behind it and I found myself switching between Night and Normal vision depending on the situation.
For the level design, I really liked the clever use of light to guide the player through the level.
The combat feels really good, I think you can expand on enemy variety, I would have liked to see slower and weaker enemies at the beginning, to let the player feel powerful, and the take that power away by making them face tricky situations. Also stealth would be a great addition to this game, I would have loved to sneak up behind zombies and oneshot them.
Great work overall, you are really talented and I'm looking forward to play more games you developed!