Using the game Colored Square, you can test your reaction speed and attentiveness. At the beginning of the game, a square of a certain size will appear in front of you on the screen. Its edges will have different colors. Inside the square there will be a ball having for example a blue color. On signal, he will begin his movement inside the subject. You will have to beat him inside the square. To do this, use the control arrows to rotate a square in space and substitute the exact same color face under the ball.