Is there a way to do the 31 introductory puzzles out of order? Whenever I click a puzzle that is not next, nothing happens. On Chat, users have told me they can jump around.
And for some reason I don't understand, I can do the first Design puzzle, even though I haven't completed all the preceding puzzles. What's happening here? (I'm using a Mac with Yosemite, but not El Capitan.)
My students are wondering about this, too.
Thanks in advance.