well...
it needs improvement a lot. I used to animate(even though I never uploaded anything to NG) so let me give you some advice. Balls with lines for eyes are boring. Poorly drawn backgrounds are even more so, and using music over and over can give your flash a very "NOOB" feeling. I find its best to avoid big series or stories, and just practice. draw a stick figure, make him walk. then do it again, ans again. make him ore realistic and then try, work out your basic movements and if you can't get that right, do it yourself while looking in the mirror. You have some potential, just no one likes little spheres with lines for eyes :\
I hope to see more for you,
~Scorn