I have two chiptunes which may delight:

Volva:
http://www.youtube.com/watch?v=cLcaR2JfgFk

A nice, quick easy track featuring the Commodore 64 and the Roland JD800. I think both synths compliment each other very nicely, even with music which doesn't really test them at all.


Tinky:
http://www.youtube.com/watch?v=hE0_pqXYnXA

Which videogames pop into your head when you hear this experimental track? I think of ones like Insector Hecti and Uridium. Even if the games don't sound like this track, I think this would fit them anyway.

Part two of this video better reveals the musical structure behind the noises.

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DVD-style bonus material:
http://www.youtube.com/watch?v=qsuRXM9Zl2Y

Just to give this topic some extra padding, here is a musical sketch thing I recorded years ago. Pals liked it at the time, so perhaps you may too.