Thanks everybody. It's funny that Dr. Mario and Final Fantasy have been brought up, because those are the only two NES games that have actual Nintendo licensed controller overlays that exist already. However, they are both pretty boring in design, so I think I could definitely create a couple cool ones for both of those games. If anyone else has any other requests, I could see what I can do.
Anyways, here's one for Mega Man 3. Gemini Man's stage is my favorite stage design in any Mega Man game, so I am pumped that I got to use its design in a sticker.