Phase, the interactive iPod music game, is now available from the iTunes Store. Developed by Harmonix, makers of popular console-based rhythm games, Phase creates levels based on songs users add to a special iTunes playlist called Phase Music. Once a song is selected, users tap the Click Wheel’s left, center, and right buttons to match corresponding “discs” in the game, and are also asked to slide their finger on the Click Wheel to match “flowing sweeps” of dots that appear in between the discs. MTV Network’s Phase is available now for fifth-generation iPod, iPod classic, and iPod nano (with video), and sells for $5. For more information on Phase, check out our First Look article.