Wow, this is great! I had no idea such a project was even being created. I thought it would end right before he fought Robotnik. I guess it's fine that it ended where it did. This was quite a faithful adaptation of the original game. Yeah, this was before it had a ton of characters. Those were simpler times.
You did give the enemies good personalities. Any Sonic fan, such as I, should appreciate this. I will admit the animation did seem a tad off sometimes. It was still mostly well done. Hey, it's that guy from the 1996 Sonic movie.