Gotta say, I love the game and I played it for hours.
I've actually already written a few sand automata in Javascript so I made my own version of the game with my own sand physics for my friends. When I saw you got DMCA'd, I posted it on sandtris.com in hopes to keep the concept alive and more accessible. Good to see you were able to make the changes so quickly and get your game back up!
I hope you don't mind if I keep my version up, I credited you in the about section :)