+100 awesome for the annotated source. A lot of these demos get released as minified JS which makes it kinda useless to use them as a guide or hack on them.
The annotated source Rhapso is talking about is here: https://ipfs.io/ipfs/QmVUvLMxTEaVBpiQBiBBdnv7ZTwt7pv8BxNhpPC...