You have to come to grips with the enemy and protect the precious balls. You can do this only by building a successful defense. To do this, you can buy different types of towers, each of which has its own price and specialization. The enemy will come at you in waves, each new wave stronger than the previous, but in this there is a positive. The more enemies you kill, the more money you get, but money can buy turrets and improve them. The game has a simple and affordable management, which is implemented by means of a gaming mouse.