Pretty fun game. Reminds me of Bullet Girls on the Vita but without the ecchi stuff. First off I had an issue with my DS4. When I had my DS4 connected the game would spin the camera around. I tried changing DS4Windows to hide DS4 and I tried it without DS4Windows but nothing worked so I had to disconnect it. Problem is, the only sound I get is from a headphone plugged to my DS4 controller so without the DS4 I had to play it without sound so I can't say much about the music or sound. Everything else worked fine and enjoyed the gameplay.
At first the melee seemed overpowered but later there were stronger enemies that resisted melee attacks so I guess that's fine since you can adjust the difficulty by sending weak enemies that the player can melee to restore health while fighting stronger enemies that requires some headshots. I do have one thing I didn't like and that is how the broken crate pieces remain in the game after you break the crates, they really get in the way sometimes at the later stages of the fight so maybe try removing them after a few seconds or something? Nothing else to add though, solid demo and I really enjoyed it.