Seeing as how i am also running with a sonic based(yet non sprite although it started there) animation series, i thought i'd give some constructive critismal though the animation was a bit choppy i could somewhat put together the story behind it and it looks pretty bold. the quality is a little bad now but what counts now is that you got the point across to someone. i am a lot less dense then most people but you gotta make it a bit more clear.another thing if you made this in Macromedia Flash 8 a couple of easily fixed problems like weirdly fast idles choppy frames and such exist.
Overall i like your idea, a little more because of biase but you should spend time getting to know your tools.
Happy spriting!