That was a really challenging game :O The enemy pathfinding is great i felt i was against real people :D
Throwing barrels and exploding them felt satisfying.
The main issue is difficulty :/ Enemies never stop shooting if they have a clear sight of you. Maybe they could reload after shooting some amount of bullets. Also the knife is almost useless , most of the time it doesn't reward for the risk you had taken :/ You should buff its range or something.
Overall i had a fun time. I want to play again if you decide to work on it :] Great work !