Good!
Really good. It's unique, considering I thought it was going to be a poor attempt at remaking Three Footed Ninja, which isnt the best game as-is anyway.
It could be better though. Put in a few extra things, like more enemies and maybe play around with the slashing to make it more exciting and the game would be great.
One irritating thing about the controls: you had to drag your mouse across the screen to scroll. It isn't particularly comfortable to do and I found myself dragging the curser *off* the screen or needing to quickly jerk my mouse back to slash a nearby enemy while trying to scroll.
You already use the mouse to walk and slash and aim and shoot, and that is enough. It wasn't a big dissapointment, but useing the arrow keys to scroll would make the most sense.
...Otherwise, really addictive. I couldn't stop until beat it. Kinda ripped off the exact look of Samurai Jack though.