This is a ROM hack or fan translation of the Japanese NES game Wily & Light no Rockboard. The "En by Interordi v1.1" modification implies an English language patch by the Interordi team, making the game accessible to a broader audience.  The Mega Man version specifies the translation focuses on elements relating to Mega Man characters and story, potentially providing a more familiar experience for fans of the franchise. The original game's music elements likely remain but now have English text overlay.

Wily & Light no Rockboard - That's Paradise (Japan) [En by Interordi v1.1] (Mega Man Version)

Willow (Japan)