Not too bad
It wasn't too bad, I must say. It was way, way, way too short, though. Take a little time and make the next one longer, and definitely put something in the movie besides Sonic and Tails walking along the same background and talking. I can understand a scene like that to set up a larger movie, but as a movie in and of itself, it doesn't work so well.
Keep at it, you're off to a good start.