The goal is to get a ball to the hole.
You set speed and course of the ball.
In addition, you draw additional wall which direct the ball in the necessary side.
You will have static and movable walls and false holes on the way to win.
You will need for dexterity.

Draw lines with your finger to create a path to ball escape.
Use the "Undo" and "Clear all" functions to try different strategies.
You will have to think to clear puzzle levels.