What is "musika"

Musika is a music video game created for the iPod by Masaya Matsuura (of Parappa the Rapper and Vib-Ribbon fame). Originally called Rhythmica, Musika was created exclusively for the iPod click wheel interface and is considered similar in format to the rhythm game, Phase, also for iPod. Matsuura has said in interviews that his decision to make the game for the iPod was a simple decision because "[m]any years ago Apple's tools first opened [his] eyes to the power of music and multimedia, so it's exciting [for him] to release [his] first game for this device."