Genki Rockets
Each level featured a track from Genki Rockets. Four pieces were remixes of earlier titles, while two were original compositions. The lyrics were written by Mizuguchi, who chose which songs to include in the game. The lyrics were inspired by Lumi's feelings of seeing the Earth and wanting to communicate her feelings through song. The choice of Genki Rockets was due to Mizuguchi wanting full control over the design, scenario and music. One of the new tracks, "Flow", was released 6 June 2011 as an EP with an earlier music track "make.believe". The tracks were remixed by multiple DJs, including Metalmouse and Q'hey. Ichiki worked with the DJs, sending them music samples and giving them guidelines for remixes based on the lengths of levels. It was a collaborative process generally, but during the final phases of production the in-house sound team did most of the work. Q'hey worked on the track "Star Line", used for the Evolution level, and "Maker" for the level Passion. Some remixes resulted in complete level redesigns.