Play bowling with your finger.
When a frame start, the ball is placed in a random position on the lane automatically, put finger on the ball and flip to the pins. The angle and speed of flipping determine the motion of the ball. You get 2 balls per turn. Try to get the highest score in 10 frames.
The total score is the sum of three parts, in titled and twisty parts, there is a acceleration at horizontal direction, you need to adjust the angle and speed correspond to the value of it.