Pretty good.
Not saying I could do better. Hell I couldn't, I don't know shit about flash and I'm not that good at drawing as I used to be. Anyways onto the reviews.
I gave you a nine in graphics because I thought that Sonic looked too slow for how fast you made him seem to be going. I would have given you a ten if you made it seem like he was going as fast as the scenery. Also, isn't Enchidna spelt enchinda?
I like how you showed everyone, you'd start out with a small insignificant part of them and then let the rest just fade into place. Very nice. You did a great job on the shading, it looked very much like it was 3-D. Keep on doing great.