I think I did this during a "Sprite Battle" which I believe I won. For those who don't know, a Sprite Battle is a competition where two pixel artist make a character out of pixels. Then a forum would vote using a poll.
The idea was what if there was game based off the movie based off the game. You know a "The Super Mario Bros. The Movie, The Game". the idea of making his head really big was inspired by the the Wayne's World Video game for the Super Nintendo.