2048

2048 is the tile-sliding puzzle that became a worldwide habit: slide the whole 4×4 board in one direction, and every tile travels until it hits a wall or another tile. When two tiles with the same number collide they merge into a single tile worth their sum — 2+2 becomes 4, 4+4 becomes 8 — and a fresh 2 (occasionally a 4) spawns on a random empty square. Merge your way up to the 2048 tile to win, then keep going: 4096, 8192 and beyond are all reachable with a disciplined corner strategy.

This version is built to be played anywhere. On phones and tablets the board responds to swipe gestures in all four directions, with on-screen arrow buttons as a fallback; on desktop the arrow keys and WASD both work, and the page never scrolls mid-swipe because the capture area is limited to the board itself. A one-step undo rescues a wrong swipe, and the game-over detection is exact — the overlay appears only when no slide and no merge is possible.

Everything persists locally. The board, score, undo state, best score and play count are written to your browser's local storage after every move, so you can close the tab mid-run and resume exactly where you left off. The privacy strip on the page is literal: no account, no server, no analytics of what you play — clearing the site's data (or pressing Reset saved data) removes every trace.

Under the hood the game runs on a pure, deterministic engine: slide and merge logic are plain functions with injected randomness, which is what makes the automatic saves safe — a restored board is always exactly the board you left behind.