If by original you mean the first release (on GB) then Kirby's Dreamland 2 on GB felt like a direct upgrade from 1 with some partners that act as power ups.
If you meant you played Kirby's Adventure on NES (the second game in the series) then Super Star or Dreamland 3 on SNES are both good picks from there, albeit Dreamland 3 has slower movement compared to the others.
Kirby Super Star on SNES and its DS remake are quite good. Probably my favorite of the series overall, along with Return to Dreamland on Wii. Haven't played the 3DS or Switch games personally.
I mean the GB release, but I think I'd be pretty open to just about anything from the series. Thanks for the recommendations though either way!
