Pile Of Balls is an interesting arcade game on www.flash-game.net. Your mission in this game is to destroy balls by connecting 4 or more balls of the same color. You could use the left and right arrow keys to move the balls. Up and down arrow keys to rotate, and space key to drop. Once it starts, you will find that there is a rectangular blue grid in the right of the screen. In the left of the screen, you can see your score. When you press the start button, there will be balls falling down from the top of the grid. They are three in a group. When you put 4 or more same color balls together, they will disappear. And then you will get score. Good luck.