 Instead of having to repeatedly tap the shot button for rapid fire, the feature is on by default.In most of Cave's other manic shooter games, rapid fire is usually an option that must be enabled through the game's BIOS by an arcade operator.The game still utilizes the Kakusei, or Awakening, mode from the first game, where enemies and bullets are slowed down at the cost of collectible green gems, or Seireiseki.