Catch the Ball dropping from upward.
Please hold the ball which falls with sufficient timing.
If an arm is touched, it will move.
Please operate the ball on seesaw well and put into a jar.
A touch of the right and left of a screen will incline seesaw according to it.
Equation entry/editable Calculator
Extended significant digit >16
Flash mental calculation
Brain training program
It is a tuning fork program for the guitar.
You are in House of Ghost.
Please get treasure, avoiding a ghost.
Kick a ball by a finger, hit the target.