Circle Dynamics app for iPhone and iPad

In a world, where everything is made of circles, your finger is god, the screen is your landscape, and with it you have the power to spawn an infinite amount of the multi colored circles. Give your device a quick shake to the side to make it so the circles are trapped in the cage of however big your screen is, and give it another quick shake to free the circles from said cage. Or, you can quickly rotate the device towards or away from you, allowing the bubbles to either float in the air, or fall straight to the cold hard ground. You then have the power to hold the device in any which way you please, giving you total control of the circles positions not only in space, but also time. The screen is your landscape, play God.