The tune has been around for a while. I’ve uploaded the footage of a non-final version to youtube two years ago, for example.
Besided some minor tweaks it was already 99% finished in 2006 and finally got released now through a “made in a hurry” brainstorm demo at blockparty’10.
You can download the demo here: here or simply watch it on youtube, if your hardware is a bit outdated or lo-fi.
The zip file of the demo also includes the VBR V0 MP3.
The thing which might be a bit special about the bassline concept is, that it is played by frequency env-automation rather than by note entries.