一个外国网站看到的关于数字填写的程序代码：

Description:
intercept on the game select with the joystick.
press the button the game.
in the game with the joystick to select field.
Change the value of the button.
gray numbers can not be changed.
if the background is green then the field and the rows and columns is correct.
when one of them is not really yellow.
Game Number 0 is a test game where only the 1 is missing :-)