Hmmm... That has some real potential, man. How long did it take you to code?
All in all, it was pretty nice. Hero moved fast enough, collision was nice, very simple system... nice all around. Very smooth. Is there any chance that I could provide some story ideas? Or graphics. I would love to work on this! Maybe even music.
My only major problem was that there wasn't comboing. Plus the hero's attack was too close range... I'd say make it so that the hero's attack effects a 48x16 pixel space infront of him. And make the slash horizontal. I can help with the animations if you want.