Meh
The animation isn't anything I haven't already seen. I wish you would try and animate these with your own drawings (or even a friend's drawings) instead of borrowing graphics.
I'm a HUGE sonic X fan. To me this story is just another fanfic. None of the characters are IN character (well except maybe sonic). My biggest problem was believing your version of Cream. She's supposed to be one of the nicest, sweetest characters. Watching her get angry/worked up so quickly made me actually feel uncomfortable just from reading it. It might have been funnier and more convincing if you had cream be really passive about it by the way she speaks, but still had her think in the way she did in your flash.
Aside from those two things I liked it. The story idea is actually pretty creative and I got a little excited when I read what it was about.
Sorry to be so nitpicky but I really am a huge fan of the series <3