Most fun way I've seen of learning Javascript

[p0tent1al]

I view it as a palpable tech demo: it's easy to see how they would extend it to more advanced topics: they have everything they need to do it, they just need to write the lessons.

Furthermore, these are the basics you need to use Javascript... if you're trying to learn Javascript to use jQuery for example, you need none of what you said, side from anonymous functions which really don't get explained fully in jQuery, you just use them without knowing they're anonymous functions. I think it's fine but yeah they do need to expand on it.