Really great game! The visuals, sound, music, gameloop, everything screams "POLIIIIIISHED", it is awesome what you did in only 7 days! The concept is good, and beautifully executed, good job!
My only real complain is that... I got bored really quickly ^^'. All the enemies seem to have the same pattern, so it's always "attack, [block, attack, attack] (repeat until enemy dies)", which gets old quickly ^^'. I would absolutely LOVE to play a game like this, but with more diversity in the attack patterns. That could be a really cool mobile game, I wouldn't mind paying a couple of bucks of watch videos between my runs ;)!
Congratulations, that's a really solid concept =)