Here are the directions. Read them here because they're in Japanese on the website.
- Click "START"
- Wait for the count down
- Memorize each number's position on the screen
- Then click the circles from the position of the smallest to largest number
- At the end of the game the computer will tell you the age of your brain (according to them)
- Leave a comment with your brain age!
I did this twice and both times my brain age was 35. I blame pregnancy. I also had trouble with mixing up the sixes and nines, which I did consistently. I don't think that is pregnancy-related.