Mega Man 2 is an NES game where nowadays you can actually finish the game on a first playthrough without using save states or banging your head on a wall due to how difficult it is. MegaMan 2 is a very balanced game with very good platforming and levels. It fixes the issues of Mega Man 1, which aren't many aside from NOT being janky and difficult as the 1st game. This is officially one of my favorite NES games and I heavily recommend playing it if you want to get into the Mega Man franchise