I wanted to make a song that reflected what Nostalgia feels like. Almost like a melancholy-type sound. I started with all chip sounds, but later went back and added an extra synth to give it a nice kick and effect. This of course ruined that whole sound I was going for, so instead I made the song into an upbeat 'game-like' song.
EDIT: Be sure to check out "Bit-Hacker", a Xbox live indie game where 'Nostalgia!' is featured! :D