What I mean is when I click on the screen ball jumps DOWN, so I need to have an extra button to JUMP UP...
Ball is moving by two actions. Left Move and Right Move. If you can set up two more actions where ball moves up and right (left), you can attach these two new actions to two new buttons. Game uses now two buttons (left and right). With two new moves up (left and right) you have to use four buttons instead of two.