Small ball meet the rainbow will become big, sometimes it is a small watermelon, sometimes it's a basketball, sometimes it looks like you can't imagine. You need to do is wait for the right moment, and then click on the screen for a small ball ball jumping in the mystery of the maze. https://itunes.apple.com/en/app/little-big-ball/id1031170982?l=zh&ls=1&mt=8