This is A Game with Balls, just released for iOS and Android devices. You control a cannon which fires at oncoming objects, pushing them away to prevent collisions. The cannon can be fired either with touch or tilt controls and there are four stages to play on.
I love simple games and this looks fun for a buck. And since it's the free app of the day on Amazon's Android Marketplace, I will definitely be giving this some play time.
\ We've blogged about this before: read (1) back stories