The moveset might just be the best in the Kirby series, maybe besides Return to Dream Land. I haven't played the newer games.
The music is simply pheonomenal. And I love the system of different games. My favorite game was probably Dynablade.
The art for the game is fantastic. I really like the 3D effect they were going for.
Overall, it's a really good game. It's the type of game that's so good, I leave it wishing for more. I've felt this with Dream Land 3 aswell, they're both really nice games.
Pretty much everything I've said so far can be applied to Dream Land 3, except for the moveset part. Even Kirby's movement in Dream Land 3 feels too rough.
After you puff out air, Kirby staggers for too long. It doesn't feel good. Also, the abilities are very bare bones in Dream Land 3. I assume they were meant to be used with the helper friends, and I did find some ability-helper combinations to be fun.
So, not only is Kirby Super Star good, but also Dream Land 3. Adventure is also nice, but quite old by now. But still playable.