not bad...
the sliding of the guitar on the back it's simply not good animation, simple scene by scene (not's that a bad thing) but if you start off by lifting the guitar and then change a view for the actual slide on the back it would look much better, also isn't the bad demon lord "Satan" from the South Park series?
Now it does not matter how good or bad is it because doing Flash animation it's no easy task and you have shown you got some potential there. But you have to admit the whole save the girl thing is kind of weak... and you missed the most important thing there's no plot what so ever maybe in episode two things can come more clearly.
Still you deserve a seven acceptable, not nice, not good or great, but acceptable.