This is a match 3 game which means that your main goal is to make lines of 3 or more identical pieces. You do it switching places of adjacent pieces. Unlike the classical variation of the game, here you can only switch the places of the pieces horizontally. On the other hand, you can use any pair of pieces even if they don't form a 3 pieces line after you switch them, which means that you can make a plan and form a group in several moves.