The NA cover's art feels cramped with the main Kirby being larger and having the sword which takes up more space. It shoves all the other Kirby guys over and almost fully blocks view of the mirror.

All Kirby did in the original game was hover, swallow and spit out enemies because he didn't possess any Copy Abilities until Kirby's Adventure. Kirby's Dream Land - Original Concept Art View 8 Images ...