I didn't get a chance to post more as I went through it, but I beat Donkey Kong on my Super Game Boy 2. Great game that really shows off what the Super Game Boy was capable of (yet barely utilized by any other game). I'm guessing the game was overshadowed by Donkey Kong Country released later the same year, but I'm glad I finally bought and played it. I managed to keep my lives around 30-40 through the whole game, though I had fewer than 10 by the time I beat it because the last couple stages stumped me a bit in terms of what exactly I needed to do. But overall I never found it overly challenging, but not a total cakewalk either. I just managed to keep earning extra lives at about the same rate as I was losing them. The airplane area was probably my least favorite, as I wasn't crazy about any stage with wind pushing Mario, but it's a shorter area with only eight stages anyway.