Use the following instructions since the game is in Japanese.
1. Touch 'start'
2. Wait for the screen to display 3 - 2 - 1
3. Memorize the number's position on the screen; then click the circle from the SMALLEST number to the BIGGEST number.
REMEMBER 0 IS THE LOWEST NUMBER
4. At the end of the game, the computer will tell you the age of your brain. The lower the number, the better.