As two rival builders began to construct their medieval castles complete with generators, a dispute between the two breaks out. They both think the other castle is weak, and that they are the better builder. So both builders then began building castles to protect their generators while mounting a high powered cannon to fire upon the other castle. Find the right configuration to best protect your castle, while trying to destroy his generator. At the end of each level you get points to upgrade your cannons skill so you can prove that your castle is the best castle in all the land.