Crush the Castle

A long long time ago in a far away place, there was a weak king, who was abused because of his kindness.  His lady notice this and told the king that what he was doing was so wrong.  She wouldn't want to be with someone as weak as the king.   The king was so in love with the lady that he decided to prove that he is strong.  He decided to crush the other castle to prove it.   The game is played via mouse and you need to calculate where the projectiles would land.   Try to crush the castle with just a few projectiles used.  As you progress in the game, there will be more powerful projectiles that you can use.