The idea is simple: remove balls from mini labyrinths, making them pass through various nooks as you turn this mini maze. The goal is to leave none behind.
You have to be careful when approaching the exit, to ensure that no ball gets out of the bucket on the bottom, since that is where you will add points to move to the next level. Besides, it is following the "instinct".
Recently released, Balls Rotate is free and available for Android and iOS.