Not very good.
__The Good__
I hate to say it but there wasn't a lot of positive things in this flash. You used good music. It fit well especially in the beginning. As far as the game goes, it was decent. It ran pretty well.
__The Bad__
The graphics were very poor. The characters were alright but you should have used a different variety of them. The background was terrible. It just looks like you took two seconds on it. Why was the health bar a rainbow? Please change that to a more solid color like red or black. Also it was way too short and way too easy. Hvae more stages and make it harder next time.
__Improvement__
This flash needs a lot of improvement. Have a lot more and better backgrounds, put a little more effort into your graphics, have more stages and make it longer, and make your next game a lot more challenging.
__Over All__
Over all this flash wasn't very good. It really needs a lot of improvement. I did have a little fun playing it though. Nice try on making this flash. Good luck on your next one!