Threes Remix

The original slide-and-merge puzzle — the game 2048 was built from, and a very different, more deliberate beast. Swipe to nudge every tile one cell (not all the way across). A blue 1 and a red 2 join into a 3; after that, only equal whites merge — 3+3=6, 6+6=12, 12+24… and on up. A new tile slides in from the trailing edge every move, and you can see the next one coming, so you can plan. Reach the target tile to clear the level; the target doubles each level for deep, escalating play.