Drag across touching tiles that show the same number, or the next number up. Let go to collapse them.
The whole path folds into the tile you finished on. Double the tiles and you gain another rank.
| 2–3 tiles | +1 |
| 4–7 tiles | +2 |
| 8–15 tiles | +3 |
If the new tile matches a neighbour, it swallows it and ranks up — again and again. Deciding where your path ends is how you set these chains up. It is the whole game.
A new row rises every few moves, whether your weave was two tiles or twelve. Small weaves cost the same as big ones — so hunt the big ones. If the stack crosses the top, the run is over.