Kawaita Sakebi, the song that defined season 0. This is the one I got the most compliments on, but maybe that's because it's the most easily recognized. It is the theme song for Yu-Gi-Oh! Abridged, after all.

For the rest of the 8bit music for my season 0 fan game:
http://www.thedevhome.net/yaminovideogame/soundtrack