Swipe or use the arrow keys. Every cube slides as far as it can. Two cubes with the same number crash into one. Build the 2048 cube!
You built the 2048 cube! Keep going for 4096 and beyond?
Swipe on the board, or use the arrow keys or W A S D. Matching cubes merge and add to your score. You get 3 undos a game. Reaching 2048 earns PhatCoin, and a new best score goes on the leaderboard. Your game saves by itself, so you can come back to it later.