Use the arrow keys to avoid the asteroids in the rocket. Use 'W,A,S,Z' to help Scratch avoid the asteroids. Have a go at completing these challenges Class 5: Can you add a space helmet to Scratch? Can you modify the code so that Scratch can get into the rocket? Can you add a timer so that you can see how quickly you can get Scratch in? Can you add code to have a space background and Earth in the picture so that you can return home? Can you make the game stop when you reach home?