Played it, and only encountered two issues:
1. Bullet decals can go onto your hand?
I managed this by shooting at a wall then slowly moving my hand from in front of the gun to behind the wall.
2. It lags a lot with full-auto guns sometimes.
Most prominent in Killhouse for me, it just drops from a solid high fps to about a 5.
Other than that, it's great.
EDIT: Fixed typo
EDIT 2: Specified edits