Increase your knowledge. A challenging puzzle game that reveals an interesting fact at the end of each level. To play the game, try to change all the solid push-buttons to clear. Pressing a button will change its state to the opposite so that it becomes either clear or solid (therefore, pressing it twice will revert it back to its original state). Additionally, the state of the surrounding buttons immediately to the north, south, east and west will also be inverted which makes the game a bit more difficult than it looks. As you earn more stars you can trade a star for a hint or you can press the restart button to start over if things get too difficult. Once the puzzle is solved an interesting fact related to the displayed photo will then be shown. When you're in the game check out the help in the settings menu for more information. Let me know in the comments if you have any suggestions for the game.