Bouncing Balls is a free online game on helixjump2.com. In Bouncing Balls you are in charge of a simple task: remove the slowly advancing wall of brightly colored balls before it reaches the line at the bottom of the screen. You must fire balls of a corresponding color at them. They will pop if there are 3 or more of the same color touching. Easy, right? All it takes is to carefully aim your cannon at the wall, and fire orbs at them. When you have cleared the screen you will move on to the next level.
So shoot smart, use walls for tricky bouncing shots and clear each level. It looks so simple, yet it's so incredibly addictive. Practice that and soon enough you'll be a pro. Good luck!