Google Play Store: Who Jumps? 1 or 2 Quick reaction game. Test your quick response time. Try to jump without colliding. Sounds easy, doesn't it? But it isn't. You have to tap right or left at the right moment so that the big tile 2 can jump over the little tile 1 without colliding. At the same time, the game gets faster and faster. Getting the timing right becomes more and more difficult. If you tap too late, too early or on the wrong side, the two tiles will collide and the game will be over. Train your reaction time and perception into this free quick response time game. Are you fast enough? let's see ! Play, enjoy and have fun !