I felt that the bloom on the weapon was too wide and could be narrowed a bit. The music slider on the main menu also didn't affect the music playing on the main menu. Not sure if it changed the music in game. Pathing seemed a little broken but I'm sure that's a WIP, and the guys who throw themselves around in a cage work perfectly. I think you could half the health of all of the units and it'd benefit the game. FPS dungeon crawlers, in my opinion, work best with lots of enemies with low health than a few with high health.
Overall a solid fun demo and I look forward to seeing what you add in the next demo.