This is truly great. I was looking for some introduction to programming for my little kid, and I wanted it to be very flexible but also visual, and I think this just the right tool.
I ran into a problem though. I can run the commands in the REPL and I can see the new turtle position in the terminal, but there is no quil window with graphics. I can also run the example function, but I get "quil.Applet cannot be cast to clojure.lang.IFn".