I liked the background graphics and the music. The beginning was cool. I really felt the anger.
It was weird attacking with the mouse button, and I had no luck with the boss. It felt like I had to take damage to get close enough to deal damage and it had way more hp. So I just kept dying. Would have been nice to have an attack button on the gamepad, as I could move with it.
Really liked the vibe you were going for. The game has a lot of potential!