WOW
I must say this is possibly one of the best flash's I have ever seen. and also one of the most perfected. Its simply amazing that you did all of that alone. and btw, what kind of keyboard is that? Im looking into getting a music setup much like you had there. email me if you care to give me any details.
The only thing I noticed was with the different styles, all of the effects and landscapes seemed to be a different and more fitting style than the actual people. To me it seems mayeb if the lines were more stylised.. maybe thinker, or smother.. I dunno, its amazing no matter how you look at it anyways!