2048 is a slow, thinky puzzle, a natural fit for a calculator. Slide the whole board with the arrow keys, merge matching tiles, and work your way up the powers of two.
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The rules in one breath
Every arrow press slides all tiles in that direction. Two tiles with the same number merge into one worth double, and a new tile drops in after each move. Reach 2048 and you win; run out of moves and it's game over.
After a win you can keep playing the same board for a higher score, and your best score is saved. ENTER restarts after a game ends, CLEAR quits.