To play the game, clear the rows by making all the blocks in the row the same color. You change the color by clicking and dragging over the blocks. When all the rows are cleared on the screen, you advance to the next level, and the amount of points you can gain increases.
The game also features achievements. As you play the game, you may gain an achievement like clearing a certain number of rows, gaining a certain number of points, and more. The achievements are automatically saved so you don't have to get the same ones every time you play.