Evil enemies are surrounding your territory, trying to capture it. You are alone against a horde of evil invaders. So the only way you can stop them is to build a defense tower. It will require strong skills to construct it in a way to deal with so many opponents at once. Note that they will be approaching you from all directions. Make sure to add enough weapons to hit them all. The more enemies you are able to eliminate, the higher reward you will earn to upgrade your tower. Prove you can succeed!