You can tap to drive the circle once after a rebound and finally touch the target.
Tap the screen to impulse the circle. Please drive it to the target and collect stars as many as possible. You can control the force by adjusting the distance from the circle.
The circle will be disabled after a tap and you cannot control it anymore. The circle will be activated again when it hits something. So please control your circle carefully.
Enjoy the game, you'll love it.