Glad you like it, it's something I put together very quickly in a couple of days, with a little help from one of our artists, but mostly using assets that are available (or are going to be available) in our Market.
It's really, really, really simple. I've attached a zip file with source code for you to look at.
A lot of the code deals with creating trees, flowers and so on. Then there's a big block of code that deals with the "code bar" at the top, with a fake syntax-highlighting effect. The rest is straightforward: play an animation for the girl, move her to a new destination, and add event handlers for onAnimationEnd or onMoveComplete, then do something else :)
We'll try to find some time to write a proper tutorial, but for now I've added some comments to the source code, so it should be easy to understand. Any questions just let me know.