Click on the green flag, you'll need to allow the use of you camera and microphone. Then, you have to keep the dial over the red area for more than a second in order to start the game. Once it's started, move your hand over the corresponding shape to get a point. When the score gets to 10, the game is over and you can start all over again.
Another tutorial from the course "Scratch 2", so most of the code ideas in it are really the teacher's :) I just changed the sprites.
