Self-destruct:Pause the game and press Up(2),Down(2),Left, Right, Left, Right, B, C. Your ship will explode when game play is resumed. This may be beneficial when fighting Bosses. After your ship explodes, it will split into four bells. Taking a green bell will enlarge your ship and allow fifteen seconds of invincibility. While invincible, any target that comes in contact with your ship will be damaged or destroyed. If a green bell does not initially appear, shoot one of the other bells until it turns green.