It's honestly kind of amazing how this game even exists. The first game wasn't successful, so this was made during the developers' free time while they worked on other projects, it only had 3-4 months of development time, and still somehow managed to be better than Mega Man 1 in every way, be considered the best Mega Man game on the NES, and is arguably the best game on the console. It's one of those game design miracle stories that are really crazy to think about.
As for the game itself, it's just as surprising. Basically everything has been improved, to the point where the game is actually fun to play now. Like even separated from the original game, Mega Man 2 is just really fun to play. The core gameplay is solid, the weapons are fun to play with, it looks really good, it performs flawlessly for NES standards, and the music SLAPS. Easily the best part of the game is the soundtrack; I listen to it all the time.
Give this one a shot. I think it's one of the few NES games that's actually worth your time nowadays, and it's easily my personal favorite.
As for the game itself, it's just as surprising. Basically everything has been improved, to the point where the game is actually fun to play now. Like even separated from the original game, Mega Man 2 is just really fun to play. The core gameplay is solid, the weapons are fun to play with, it looks really good, it performs flawlessly for NES standards, and the music SLAPS. Easily the best part of the game is the soundtrack; I listen to it all the time.
Give this one a shot. I think it's one of the few NES games that's actually worth your time nowadays, and it's easily my personal favorite.