Replace Mephiles with someone who isn't a recolor, like Bean, or Bark the Polar bear... and... um... ya know, those are, like the only two characters in Sonic that aren't recolors.
Hurr, the music should be from Linkin Park. What do you think? Put music from a Sonic game in it.
And you should make 35 Acts, 14 zones, a boss in every zone, and no introducing any fan characters.
Also Tonaltmadness made a good Sonic engine, and by good, I mean it looks like a Sonic Advance port.
If you don't take this random guy's advice, your game will only be trollbait.
FourSwordsKing
Ok, well I can give you a list of a few programmers that are NOT free (because of the power of three):
1. BoMToons
2. Rubberninja
SonicLink64
Ok, well, I already knew that.