Slide every tile one direction; two equal numbers that touch merge into their double. Reach 2048 before the board fills up. A small solver plays the opening for you, so you land in a real mid-game position — take it from there with ←↑→↓, WASD, or a swipe.
← ↑ → ↓ or WASD·swipe·U undo·N new game
Colours are mixed live from this page's theme tokens — pale amber heats to red and keeps deepening as the numbers climb, and 2048 lands on the green this page reserves for a finished job.