See also:
Best VGM 320 - http://www.youtube.com/watch?v=w_N7__8-9r0
Best VGM 989 - http://www.youtube.com/watch?v=S3k1zdbBhRQ

A collection of my favorite videogame music. Note that most of them are from games I played so I might miss some great ones from games I never played.

Gameboy
Donkey Kong Land (1995)
Ancient Beaver Bop
Graeme Norgate & David Wise