Cameos
The game features cameos by other notable Taito characters or settings from games as diverse as The New Zealand Story, Darius, Space Invaders, Arkanoid, Liquid Kids, KiKi KaiKai (including Cindy, known in Japanese versions as Sayo and the English Pocky & Rocky games as Pocky), Quiz by Yu Yu, PuLiRuLa and Fairyland Story.
Read more about this topic: Bubble Symphony