When you tap start button, a game starts.
Please tap it from 1 to 16 in turn.
When you do not get a wrong turn from 1 to 16, it is recorded in an elapsed time.
You compete for the shortness of the elapsed time.
Whenever you tap one number, the position of the number is sorted at random.
If you tap a wrong number, it is game over.
It supports GameCenter which can compete with a world player.
Please challenge the limit....