http://i.imgur.com/ZafTI5T.png This has got to be a new record. Used the random move setTimeout method with 4 directions, and strategically pausing to merge pieces. EDIT 1: http://i.imgur.com/Rt3V5kb.png - Just reached 4 million. EDIT 2: http://i.imgur.com/QyrW3QK.png - 22 million: When do I stop?
It seems random with 4 directions works well more than 3.
http://imgur.com/u0Yws7T Here is what I ran so far with random 3 directions. V shape emerges.