So, Make a Good 48 Hour Mega Man Level has been released not too long ago!
https://www.youtube.com/watch?v=JkP7Vz9fMXo
This is a game in where yours truly has actually made a level for, and while it isn't very good, there's some amazing stuff right there, in and out of the entries, it's legit very fun! Play it if ya like NES Mega Man stuff.
The levels are pretty old but they are still very fun to go through, even some of those that are at the lowest tiers.