Swipe, or use the arrow keys / WASD / the on-screen pad, to slide every tile in one direction.
When two tiles with the same number meet, they merge into one worth double.
Reach the Goal number shown at the top to clear the stage.
Fewer moves means more stars — beat the par to earn all 3.
Later packs add gates, blocks, and enemy units that change how tiles move.
Stuck? Undo, reset, or spend a Hint to watch the solution.