I've hit every button on my keyboard/mouse, all I can do is move/block. You should add a screen explaining what your supposed to do, or at least put instructions in the author comments. Right now it seems like you are just supposed to sit still and block with "down", but there doesn't seem to be a way to actually win or move from that spot once he starts attacking.
newgrounds.com — Your #1 online entertainment & artist community! All your base are belong to us.