The music has improved including a different drum kit. Some palettes have been edited. Bugs have been fixed during testing via beta releases. No giant rings in levels except Angel Island Act 1, but special stages can be accessed via level select. Red Sonic is available to play. The level select screen has a new , from Sonic Spinball.

You start with 10 rings on every level except Lratbie Gatfen Act 2 and Angel Island Act 1 (without touching a ). Please note that most of the brand new levels are (no boss). Plus the for them resembles from Sonic CD. Sonic 3 & Knuckles: Hard Bosses Edition 2 is a very hard bosses hack of Sonic 3 & Knuckles by . .