Not gonna lie: I'd pay money for this as a full game. Classic Sonic gameplay? High-speed killstreaks? A totally bitchin' soundtrack?
Obviously the level design needs some work since it's mostly just straight lines and jumps, but if SEGA put the effort into a modern sidescrolling Sonic of high quality and included some sort of fitting gimmick that let you pull off killstreak moves like that meteor soccerball kick (Maybe have Tails tag along and use a DKC-style switchable partner control scheme so you could have Tails hurl a curled-up Sonic at enemies or Sonic throw Tails like a buzzsaw or something.), it'd sell like hotcakes during a hotcake famine.