The most simple game in the world? Just click the green button - not the red one. You've got 1 second to press the green button. But for each correct press on the green button, that you make, the button might change color, or it might not... Sounds simple? Well it isn't :-) This game will test and train your ability to keep focused, and make fast decisions, during a longer time. Gradually you will get better and better at keeping focused. This game supports leader boards from Google Play, so you can compare your results against others in the world. Achievements are regularly awarded to the play.