Nice demo!
I loved the demo! The sprites blended in good, the sound was good, but If I were you , I would Redesign it for the main game.
For Example, This is more " Classic RPG " Than Megaman. Put Megaman Back in control! Be it something as little as making the interface roboty or large as a complete interface redesign, do it.
By the way, I can't wait for the full game.