How to play
Use the arrow keys, or swipe on a touch screen. All tiles slide as far as they can in that direction.
When two tiles with the same number touch, they merge into one with their sum. Every move adds a new 2 or 4.
The round ends when no move is possible. Reaching 2048 lets you keep going for a higher tile if you like.
A tip
Keep your biggest tile in a corner and build towards it along one edge. Avoid the one direction that would pull it out.
Your board is saved in the browser, so you can close the page and pick the same round up later.