There are so many things I love about this game but it's not without its rough spots. Some of the secrets: heart tanks, and capsules feel like you're trying to get the game to glitch out to get that one perfect dash jump off. The timing of the final Sigma battle is such a huge spike in difficulty compared to the rest of the game which is fairly balanced. I'm not sure I really like how hard the design leans on X's charge shot. It slows down the speed a lot from Classic Mega Man even if everything else is ostensibly faster.