This might be my favorite portable sonic game (although I haven't played Rush). It's an odd mishmash of sonic 2 and 3 primarily, with level themes from 2 with new designs, gimmicks from 3, and music from all over the place. It's pretty fun, and the screencrunch doesn't really hurt the game suprisingly, spare one or two times a bottomless pit comes out of nowhere. Even then, the level design is fairly forgiving, where falling often leads to a path that takes the player back up to where they fell rather than instant death. Boss fights are rather fun too. It's a great time and an easy recommendation for sonic fans.