I worked with it to debug most of the bugs from its one-shot attempt, add drag and drop functionality and make it work on mobile. There could still be a few bugs!<p>You can see the bugs in its one-shot attempt here: <a href="https://www.youtube.com/watch?v=AhJ07anVkYk" rel="nofollow">https://www.youtube.com/watch?v=AhJ07anVkYk</a>