Cool, but the math seems wrong. For example, why does 27+27 make 81?
Agreed. The next tile is 243 so it seems to think that each tile should be 3 times bigger than the previous. For 2048, each time you combine tiles, the new tile is both twice as large as the previous tile and the sum of the individual tiles. I think this version is trying to use multiples of threes instead but then it can only honor one of those patterns. Now, if the game had you mash three tiles together...
This is the best mod of 2048 I've played so far because if I just imagine that I'm playing 2048, I feel a much greater sense of progress.