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Ran through the Hour of Code tutorial & its great! Only suggestion would be to include commenting. Since you created ways for people to save and build on their code, I think it would help to encourage people to add their own notes and comments as they're learning. But totally get that this is as stripped down as an hour long tutorial with interactivity can get - congrats on that achievement!
Answers
Yes, this was just something we forgot when shooting the videos. I agree we should think about including this.
filed an issue here: https://github.com/scottgarner/Processing-Hour-Of-Code/issues/65