2048 Game

How it works

2048 is played on a 4×4 grid. Every move slides all tiles as far as they go in one direction; two tiles with the same number that collide merge into one tile of double the value, and the merged value is added to your score. A tile that has just been created by a merge cannot merge again in the same move, and merges resolve from the far edge inwards — so a row of 2 2 2 2 slid left becomes 4 4, never a single 8. After any move that actually changes the board, one new tile appears in a random empty square: a 2 nine times out of ten, a 4 the rest of the time. Reach the 2048 tile to win; you can keep playing for 4096 and beyond. The game ends when the grid is full and no two neighbours match.

Every square is labelled for screen readers and the score, move count and game state are announced through a live region, so the whole game works from the keyboard: press Tab to reach the board, then use the arrow keys or W A S D. On a touch screen you can swipe across the board, and the four direction buttons always work with a mouse, a tap or the keyboard. Undo takes back the last move, including the tile that spawned after it, and your best score is remembered in this browser only (localStorage) — nothing is sent anywhere. New tiles come from a seeded generator, so adding ?seed=42 to the URL replays the exact same game. For practice or puzzle setups you can load a position with ?board= followed by 16 comma-separated numbers (row by row, 0 for an empty square) and add &spawn=off to stop new tiles from appearing. Everything runs in your browser: no signup, no ads, no uploads.