Very accurate, in fact shockingly accurate, reminds me of the old Sony mega drive versions, too much nastalger.
Sonic Advance 4
Gosh, is this game really 12 years old already?
For being as old as it is, it's pretty spot on, an almost perfect recreation of the Genesis Games/Sonic Advance, especially impressive considering this was nearly a decade before Sonic Retro published their physics guide, this being made in the era when only the developers over at Sea really had any idea how Classic Sonic physics worked.
My old childhood flash game!!! :D
its a little glitchy but i rate it five cuz it reminds me of sonic advanced. and i like that you gave rings on the boss battle. unlike other sonic games. it looks like an origanly sonic game. LOVE IT!