The object of the game is to place the numbers in order by using empty spaces to move the digits.

The empty spaces are located in a column or row and can be used to move a single digit in that direction.

The game ends when there is no space for any more digits on the screen.

If you are unable to place a number in the correct position, you will be given the option to swap it with another digit.

You can choose to play in the background or to have the numbers pop up on the screen.

The game is designed to be easy to play, yet to provide a challenge that is more difficult than playing on a traditional calculator.

You can play the game with your friends and relatives.