I'm a bit tired tonight, but I am considering it as the topic for the next Free Hype Template...
...but this is sorta covered in "A Book About Hype". The "Controlling" section shows how to make a little spaceship move around the screen with a 4-way (on-screen) controller. So, if I make a template, I want to make something unique – which respects the people that bought the book. (It doesn't use arrow keys though, so that is a big difference. The book was made to be compatible with iOS devices, which typically doesn't have a keyboard.)