This is a fun game in which Avery (2; at the bottom) and Hannah (1; at the top) race to the finish. To make Avery move, press space. You can race against the computer - click the green flag and Hannah will move automatically. Can you beat her? Alternatively, you can move Hannah manually by pressing the right arrow key. At the end of the game, the game goes back to the start.
This was one of the projects in the Scratch tutorials (Tips).