Make sure you have the scratch webcam extension. Fullscreen the project, and stand back 3 to 6 feet make sure your hands are visible on the screen and you can reach all parts of the screen. Stand off to the side of the screen so that your body does not affect the game. Wave your hands over the fruit like in the console game fruit ninja to win. If they reach the black bar at the top of the screen then you lose. If you reach 75 fruit you win. They will go faster and faster. Oh, and yeah, there're bombs.
Full credit for the idea and game design to the creators of fruit ninja. This is a completely new and my own code by me and fairly different from the original. It is very hard don't feel bad if you can't win. Remember to watch out for bombs they are an instant loss. 50 is the score you need to win.