Use the arrow keys to move: Right arrow: Turns you all the way to the right Left arrow: Turns you all the way to the left Up arrow: Turns you all the way to the top Down arrow: Turns you all the way to the bottom. Try out the controls a little - they might be a bit confusing. Feel free to tell me your scores in the comments!
I owe credit to the "Code your own Games, 20 games to create with Scratch" guidebook. The instructions we kind of strange, but it was fun.