Again Mizuguchi's work has taken to the PSP with a precision and slickness few can match; the vivid colours and spectacular effects are revelling in that luxurious screen as if it were launch day. Although initially the audio interactivity feels straightforward and nothing beyond Rez or Lumines territory, the simple masterstroke of quickening the music tempo in line with accumulated ‘Quicken' power-ups (and therefore the game speed) adds a tense, breakneck sense of danger to high score runs.