The rules of the game
Square is a fairly simple game, where the goal is to get all nine fields to
zero. You may do so by pressing one field per turn. This field is the center
of a cross of fields that will be affected by your move. Each field in the
cross, of which you select the center, will be raised by one, modulo six. This
means that when a field should reach the value six, it will automatically be
made zero. The next example should make this clear.
Suppose we have the following on the game board:
Then we make our move at the upper-right corner:
I hope this example helps to clarify the game.
Please report bugs.