Guard of the Kingdom

The castle is under attack and you as the king would not want the castle to fall.  Get some soldiers to help you defend the castle.  You will earn money on every enemy that you and your soldiers kill.  You can use the money to hire more soldiers or upgrade your existing soldiers.  You can upgrade your soldiers twice.   As you move on to the next level, you can hire more powerful soldiers to defend your castle.   Each of them has their own strength and weakness and you need to know how to use their own strength against the enemies.