If you enjoy smashing boulders, then this is the app for you! Tap to pulverize the boulders as fast as you can before they fill up the screen. The faster you obliterate the boulders, the higher your score. Background Story, Wham! The impossible just happened. A monster-sized boulder slammed right in front of your car. With no mountains for miles, it looks almost as if the boulder came from the ominous cloud overhead. Since you remembered your smartphone.