When two tiles with the same value bump into each other, they merge. To move the tiles on the 4x4 grid, use the arrow keys on your keyboard.
Scoring works by adding up the numbers in the merged tiles. So if you combine two tiles with a value of 4, therell be 8 points added to your score. Lets look at some examples below:
2x2 tiles = 2 points
2x4 tiles + 2x2 tiles = 12 points
32x2 tiles = 64 points
16x2 + 4x2 + 2x2 = 44 points
Theoretically, the highest score is 131.072, though no one has ever gotten to that score alone. The theoretical possibility was discovered by Todd W. Neller of Gettysburg College in his paper on the Pedagogical Possibilities for the 2048 Puzzle Game.