I will erase the balls with numbers in ascending order from 1.
Measure the time until all the balls are erased.
Let's do our best aiming for high time.
If you mistouch 3 times, it will fail.
There are game modes with 16, 25 and 36 balls.
You can change the orientation of the game screen with Portrait (portrait) and Landscape (landscape) of the title screen.
You will be trained in cognition and judgment to quickly erase the ball.