Instructions: Hordes of alien waves are rushing to conquer your barn. Take your Crop Defense stance and prevent all aliens before it is too late. You are master of this tower defense and accordingly you will create the path on which the aliens will move on. Once you realize that the enemies are coming on your home land, following your own rules, there is no room for failure!
Use the mouse to drag and place circles. After you are done, you can build towers anywhere you want.