Dayumm that atmoshphere and polish is superb, The music and sfx are also fantastic and fitting. Did you make them yourself?
It is also really fun to play, although even when using headphones it was hard to tell if there is also an enemy behind you or if it's just the enemy in front of you. Maybe an additional visual indicator could help. I understand if that would worsen the imersion though.
There is a bug when you don't pick up the chest at the start you will not get bullets or a pistol from other chests. I would reccomend giving a pistol regardless of which chest you open first, or alternatively have the primary chest look different. Maybe a weapon-case
This is my favorite entry so far