Welcome to the rainbow friends world!Where the colors meet to delight you and make YOU wonder! Meet the blue monster, your enemies need to be defeated, can you do it?And of course you have a special power "Cardboard Box" to hide from the blue monster, use that power to defeat the enemy! You and your friends are asked to help a mysterious blue monster to collect all the dropped and lost items like blocks or lights, all for the rainbow blue monster boy . But when you try to find the blocks you have to be careful with the fear of blue and other colors monster rainbow friends like green boy, red or pink monster boy. Complete every stage and chapter to know more secrets and lore behind it.