Music Catch sends out shapes along with the music in four colors: teal, yellow, purple, and red. The goal is to collect all of the teal shapes to earn points, while avoiding the red shapes. The yellow and purple shapes are power-ups.
Music Catch is available to play for free online and has a downloadable full version for purchase on amazon. This version can be used with any mp3s you already have.
Finally Music Catch was ported to the iphone and is available in the App store.