The robots of the balls move towards the colony of earthlings in order to attack it and destroy it. You will command the defense of the colony in the new online game Stug Balls. Before you on the screen will be visible the road running towards the colony along which the balls of the robots will move. In the lower part of the game field, a panel will be located with which you will choose defensive towers with guns installed on them. You will need to place them along the road in strategically important places. As soon as the balls are in the reach of the gun to open fire on them. Thus, you will destroy robots and for this in the game Stug Balls to get points for which you can build new towers.