Neil Young already had a go at changing the music world, but now it's Peter Gabriel's turn to mix up the scene. The acclaimed artist has introduced a new app known as MusicTiles, which allows users to create and share remixes of their favorite tunes with a simple tile interface. Each tile represents a basic element of the song -- be it a guitar track, drums or vocals -- which can then be blended together with other elements. Users can then manipulate the effects and timing of the individual components by placing them in different arrangements. MusicTiles costs $2.99 and is availabl