This sologame will certainly keep you busy. The rules of the game are really easy, the game itself isn't!
The good news is that you can download the game for free here.
When you start the game, you will obtain a square of nine random numbers from 0 to 5. The purpose of the game is to get the number 0 in all the fields. This can be achieved by clicking on the fields. If you click a field, all numbers of the corresponding row and the corresponding column will increase by 1. The number 5 will hereby be put to 0, because 5 is the maximal value. Some examples:
1 2 3
4 5 6
7 8 9
If field 1 is clicked, the fields 1, 2, 3, 4 and 7 will be increased by 1.
When field 5 is clicked, the fields 2, 4, 5, 6 and 8 will be increased by 1.
Good luck, you'll need it ;-)
Distributed under the GNU General Public License