Enemies will pass through the roads to attack the castle. You have lost the game if the castle is destroyed. You need to buy cannons and Power Ups (PuP) to shoot the enemies to stop them from attacking the castle. When you destroy an enemy, you will get extra money to buy more cannons. When the game progresses, there will be more and more enemies and they will become stronger and stronger. There are a total of 10 levels. Have tons of fun!