<i>Shameless plug</i><p>My chrome extension <a href="https://github.com/assafmo/chrome-page-to-json" rel="nofollow">https://github.com/assafmo/chrome-page-to-json</a> seems to extract your sandbox page beautifully!
(<a href="https://www.diggernaut.com/sandbox/" rel="nofollow">https://www.diggernaut.com/sandbox/</a>)<p>BTW very nice platform. Good luck!