I have in fact played every level on both the NES and Gameboy (regular) ports (through emulators), though to be honest I don't remember much about their music. They were more or less what I had expected, the same familiar music from versions like DOS, arranged to work with the limitations of sound hardware on those consoles. I guess there's a charm to it if you are into these kinds of old-school "chiptune" kind of sound.
Comparing with the Gameboy (regular) version on youtube for a few different tracks, I think I actually like the Gameboy version better than the NES version, though I can't rule out possible variations in recording quality being a possible biasing factor in the different youtube videos I listened to.