For me personally, it was more the speed of the game. I think if the sword had killed enemies one shot, went through them, but was harder for you to dodge it might have been more interesting. Kind of, you gotta dodge the enemies but the real challenge is dodging your out-of-control sword lol. Obviously would need testing though and 2 days isn't long to try all those kinds of possiblities :)
I would have also liked to see the sword being more out of control. As in, instead it doing the turn and shoot thing everytime, you never quite knew what it would do. But always knew it would come towards you.
Anyway, obviously the idea was cool if it has so many dimensions to scale on :)