Made entirely obsolete by basically any subsequent Puyo Puyo game. Without offset or other key mechanics that came to the series later (such as double tapping rotate to flip your puyos even if they don't have room to rotate), victory in the arcade mode becomes very dependent on luck.
I have too strong feelings about American Sega's apparent need during the 90s to project their own (entirely ill-defined) fan-fictionesque personality, worldbuilding, and character designs onto Sonic, and while this game serves as a key example of that, that feels like a rant ill-suited for a review of the game itself.