送给小狄的2048！
How to play: Use your arrow keys to move the tiles. When two tiles with the same rank touch, they merge into one!
Note: This is a fork from http://gabrielecirulli.github.io/2048, which created by Gabriele Cirulli.
顺便向朝代版作者致敬
http://oprilzeng.github.io/2048/full/