A few suggested changes.
-Make more, or all, the ladders hang down one tile to make them easier to grab. One in Beam Man's stage was particularly annoying to grab.
-Make config options accessible from stages (maybe hit select to open menu).
-Less instant death traps in Cinder Lady's stage. Particularly that one area with ladder in between 2 lava falls. Too many unfair deaths there.
-Make chest with letter in Maelstrom Woman's stage lower so that using bubble will allow mega man to grab it. Not really sure what the "intended" method is.
-More contrast between foreground and background graphics. I'm getting fooled by too many background graphics thinking they are platforms.
-Music could use a rework. None of the songs are very catchy, they are super repetitive, and do not have a melody that stands out.
-Option to skip robot master dialogues (select button doesn't skip???)