I played this one today and it is very good.Stage design is different from Sega's original sonic but core gameplay still feels the same.Graphics are gorgeous.Here is the gameplay.
YouTube - Emerald Hill Act1 - Sonic Fan Remix
Demo is available here.
http://sonicresearch.org/sonicfanremix/
YouTube - Emerald Hill Act1 - Sonic Fan Remix
Demo is available here.
http://sonicresearch.org/sonicfanremix/