A quick mock up i did. It is obviously inspired by Megaman games which i like a lot.
Drawn in my Android cellphone, the app used is "Pixels touch", a nice little app for tiles or small sprites.
Palette used is dawnbringer's 32. I have to say this palette is excellent when you master it, but is much harder to use than db16.
edit: added main sprite from my other mockup and one enemy plus other minor improvements.