very good, I got a highscore of 420 not sure if it's high, it was pretty tough, especcially with more enemies and losing sight of my mouse and shooting my arrows in those spokes, when they get in there you are pretty much done for, those are my only remarks but it can be a game designed this way to make it harder.
Overall a very polished and nice looking game, preyy fun and nice powerups and good use of the theme!
Good job