I may be a bit biased considering this was one of the first Kirby games I ever played (it was either this or Super Star Ultra), but I love this game.
It's longer than the first game, which I feel ended a bit too soon, and it introduces the copy abilities the series is known for. It's also visually impressive for being an NES game. However, this does come at the cost of performance. I was probably too young to notice when I first played it, but the game tends to chug quite a bit. I heard the lag is fixed in the 3D Classics version, but I haven't played that version myself.
It's longer than the first game, which I feel ended a bit too soon, and it introduces the copy abilities the series is known for. It's also visually impressive for being an NES game. However, this does come at the cost of performance. I was probably too young to notice when I first played it, but the game tends to chug quite a bit. I heard the lag is fixed in the 3D Classics version, but I haven't played that version myself.