Click the green flag to move the mouse to centre stage. Use the on-stage arrows (Up, Down, Right and Left) to move the apple around the stage. Click the blue 'See inside' link to see the code on the apple.
Use this version to move the apple if you are using an iPad or tablet, as you my have a problem in using a keyboard. For a keyboard version use: https://scratch.mit.edu/projects/430324628