This week, Audiosurf Radio has special rides from Killing Thursby! Each one uses Audiosurf tags to create special gameplay modes. I'll let you figure out the new modes for yourself, but here's a post about Audiosurf's gameplay tag system to help.
The first ride is "Hole in the World". Killing Thursby wrote a blog detailing how they created this one (you can listen to demo versions of the song to hear their progession to the final). Then there's Run, Little Kingdom, and Crooked Fingers (a favorite of mine). The last track is a Little Kingdom remix with over 650 traffic!
Good Luck.
Dylan