This game is simple. You need to touch on the color stone symbol in the bottom which have the similar stone with the bottom stone on the left line.
There are 3 difficult mode for you which have more type of fast stone that you need to touch.
Bonus: If the left stone and the right stone are the same, you can have double score when touch on the right stone button. The stone on the right column is only got by this method.
NOW COLOR IS DROPPING, PLAY YOUR GAME.