This was a very fun short demo. My main feedback is the screen-tilt when strafing can be a bit too disorienting. But I can also understand it was done intentionally as part of the aesthetic. Maybe you could try reducing the amount of screen tilt a little bit. Also somehow making the animation of the screen tilt a tiny bit smoother, by doing a small amount of blend-in/blend-out with the speed of the animation for the sceen-tilt might help the animation feel less jerky. But that's just my opinion, I understand also if you did it that way intentionally.
One other thing, I found the character can get stuck or slowed down too much when you run over enemy gibs in the game world. Other than that I love everything about this game and can't way to play more of it!