On mobile swipes up, down, left and right to move tiles to corresponding direction. On computer you can use 4 arrow keys up, down, left, righ to move tiles. When 2 tiles that have the same value touch each other, they will be merged into a tile that have the value of a total of 2 tiles. And then the value of new tile will be added to your score. Try to get as many scores as you can. Enjoy the game!