In Water Splash Boss mode, you need to collect various objects to defeat the crocodile(Croker).
It could be a water balloon, a brick, or a strange-looking purple balloon.
You can have this experience. "I've collected everything, What am I supposed to do?"
In this case, There is something you are missing.
Take a look at the top-left corner of the screenshot below. There is a purple balloon object.
This object can be collected by combining special balloons that appear in the game.
For example, in the screenshot image, there are a cross balloon and a horizontal circle balloon.
If you match these Special Balloons, you can see that purple objects are collected.
The important thing in this mission is how to make special balloons, place them and match them.
It can be a difficult mission, but you can do it! :)