Spent a decent amount of time on this before it was on Steam - I like games where you can play to your own soundtrack. The gameplay is casual, but it's a good game to relax with a controller and your favourite tunes. Update 2019: This game has NOT aged well. It now seems to open a browser window when you click Play to the Audiosurf website. Also, these days all my music is on Spotify so it's pretty much obsolete only being able to play to your own music.