The game suffers from massive memory leaks and random performance issues to where it drops FPS and randomly restarts the stage sometimes. Should be looked into ASAP. This can also causes softlocks if you try to menu.
Mega Man doesn't feel tight and responsive enough for the stage platforming, same with trying to fight the bosses. There's noticeable acceleration and deceleration in your movement which shouldn't be there. The X inspired mechanics clash with the Classic design a lot as Classic is meant for tighter timing sections, which can be negated with X Walljumps/Airdashing (The X games are so greatly designed and encourage actually learning stage design right?)
Bustering also feels oddly inconsistent with there being a random delay sometimes, while other times it's faster. Why can't I shoot through walls?? Feels like faking the difficulty of certain sections just to be annoying. Enemies also have too much health and openings that are too short with the shielded ones just to force the random charge shot bouncing multihit gimmick.
Promising premise for a game, but needs a lot of finetuning in player mechanics and adjustments.