Hi Chris, thanks so much for the updated version. Took me a while to finally view it on a tablet, but just went through chapter 1 with my three kids. Had to work to convince them they should do this rather than just playing on http://sploder.com but I think they liked it by the time we got to the end of the chapter.
One thing that would be awesome would be if you could drag around the shapes and resize them, and see the numbers changing in the code automatically if you know what I mean. I think that would really solidify the relations between the numbers and the shapes …
Many thanks again, and looking forward to using this in my fall undergraduate games programming class!