Not bad so far dude......
I got to say, I really don't enjoy Sonic flashes that don't have Shadow in it. However, I will critique on the film itself. It's not bad so far. You've got a good strotyline, the aniamtion is pretty good. I suggest for future installments making some edits of ur own for it, maybe some custom poses etc. Also, maybe vary your sounds a bit more, look around the net for some other sonic game sound effects and such.
Well keep up the good work. Peace Out, :)