This is awesome. And what's even more cool, that it seems to be localized to other languages! I'm a polish speaker, and when I launched one of the tutorials (Jetpack Jumper), not only the interface was translated, but even the intro video. I had friends that wanted to jump into programming but couldn't start because of the language barrier. That could turn out as a great tool for them!

Edit: Just noticed that they use Microsoft Translator for most of the tutorials, but still kudos to them for taking time and providing a proper translation in at least one of them.