It's a promising start. Sound effects and more visual feedback would be nice but I understand it's an early build and those aspects come later.
But I have no idea how this is inspired by Megaman, It feels like a completely different genre and theme.
I recall a game on the Amiga that was similar to this but also had missions/levels to enter from within the topside level. I don't recall what that Amiga was called but I could see this game becoming a modern variation of it.