Even with only four playable characters, the game is very fun, its puzzle genre is good. I loved the game, I just wish you can change the controls like in the Sonic Advance series, but oh well. I recommend this game more than the PS2 and DS versions.
An example of how to do and ensemble cast game, right. Each character has different moves and is helpful to the team. Most importantly, they're all fun to play as, despite the sometimes wonky controls for a couple.