This fun number game will keep you thinking from beginning to end. To start, choose a mode. You can choose from easy, medium, or hard. Then, you will see the game board. There are nine blocks with nine squares inside each of them. You have to get the numbers one through nine in each block, each horizontal line, and each vertical line. To add a number to a square, click on the number at the bottom of the screen and then click on the square where you want to add it. When you are done, the timer will stop and you will get the chance to start a new game.