Players can fire rainbows to kill enemies or to stand on.
Bonus points are scored by collecting items dotted around level and bonuses left by killing enemies. Description Bub and Bob, from Bubble Bobble, are asked to rescue the Rainbow Islands. They get the power to create rainbows to jump on and hit enemies with. Also, there are lots of secrets and dozens of items that can only be seen if things are done in a certain order. Gameplay Kill enemies by hitting them with rainbows or by crushing rainbows on their head.