your mission is to destroy cubes with the same color in order to prevent them from growing too high. There is no particular rule, and all you need is to click the same cubes as quickly as you can. Cubes can be removed when there are more than three same ones being together. The Pow window is located on the right side of the screen. Wait for the top red line to charge. When the Pow is charged, you will be granted a special bonus which can change the cubes to a single color, make the game faster or slower, give you extra points, or make you jump a level. Sometimes you will gain more Pow if you click the bonus cion repeatedly. Have fun!