Not bad..
I like your drawing style.
I also like the backgrounds and little 3D-things that you do.
The problem is: The two do not really fit together, characters and background. Your animation ist great, but that's the one thing that kinda bothered my while watching this flash. There's a slight disharmony in all the graphics.
That's what lowers the rating. That, and the average voice acting.
You got a huge amount of talent though. Keep it up.