The essence of the game is that you will need for a certain amount of time to destroy as many zombies that will be placed before you. You will not have much time to do it. You also need to ensure that all the bombs were placed correctly. You will have very little time. If you can handle the task set before you, and you can destroy the right amount of enemies, with the result that you can move to the next level, which will be a little more zombies.