Zombies... wrecking balls... this game is screaming for a Miley Cyrus pun. Mankind has survived the zombie apocalypse and now the survivors are at a point where they will rebuild the world. Before they can do that there are many ruined structures and even some facilities are filled with zombies and are not worth risking another outbreak so they will have to be demolished. The structures that the zombies are trapped in are very Angry Birds like. Analyze the structure and then click to use the left or right crane to attach your wrecking ball to. The next click will allow the wrecking ball to descend and the next will release it from it's cable so that it can fly off into the zombie infested structure that needs to be demolished. The optimal goal is to use make every attempt to demolish the building the only one. Just because you have 3 wrecking balls in your arsenal does not mean that the job cannot be done with one. Use the perfect trajectory and you will be able to make one building collapse onto the other.