I got the web version black screen under Firefox, so I had to use the windows version.
It's very polished, the only thing that felt a little off was the long hit stun. I think the 2D sprite + special shader style is perfect the way it is, though I sometimes feel it makes it a little hard to judge distances.
Also, I broke the lock with no survivors before seeing the text, though this may not be critical in this demo, it may be something to keep an eye out for in a full game, in case hotheads play your game.