I'm bad at Sonic 2, worse than in Sonic 1, so I didn't get too far, but there are some weird things about this one.

The game is very difficult, since every time Kirby gets hit, it loses a life, and the monitors are randomized, including even bad effects, which is just bad design, since you don't want to risk losing a life.
Kirby is very nimble with his double jump, but the lack of a spin dash-like ability makes the game slower.