Press a key to start the game. Keep a ball up by touching it with the mouse. Press the left and right arrow keys to change where you keep up. If the title screen doesn't render properly the game will still start if you click anywhere.
I made it easier from version 1.0.5 of the easier game. The ball moves quicker in it and you have to click the ball. That version is at: https://scratch.mit.edu/projects/108636497/#player