Really interesting combat system which actually seemed to work quite well as far as gesture recognition goes.
I would have liked it if the game was more linear so that it was more easy to see what you have made, as it is it is quite obscure.
The graphical style is interesting. I liked it, but some people might not. The effects are cool. Tutorials should be in the game rather than in popups, but I'm sure you did that for a reason ;).
I liked the menu with that old-school introduction cinematic, very nostalgic.