Difference with the original version: there is no random tile! Each time you get a 2-tile in the first available cell.
A friend of mine reached the tile 16384 with score 274492, I have the replay somewhere to prove it. I'm sure you can do better! Update: another friend reached tile 65536 with score 983096.
How to play: Use your arrow keys to move the tiles. When two tiles with the same number touch, they merge into one!.