Drag the hand back by moving your mouse pointer and release it by clicking anywhere on the stage. If the ball goes into the hoop, your points increase. The longer it is in the air, the more points you get. If something goes wrong, you can click the restart button to throw again. Mostly, it automatically restarts.
Don't worry guys, the rocket project is scrapped (╥ ͜ ╥) A portion of the code is from @MajesticPie's Cannon Physics: https://scratch.mit.edu/projects/83139622/