Siege Hero: Pirate Pillage

Everyone knows that when a pirate invades a town, no one is left alive since they want everything for themselves.   Surviving townsfolk will surely want revenge and that is why they don't want survivors.  When the pirates came, the town is ready as they got their siege to destroy the ship.   The game is played via mouse and the idea here is to destroy the ship with minimal shot.  The pirates must die and there will be no survivors except the hostage.  If you can finish the task with just one shot then it would be better.  You will be rewarded with a crown if you can finish the job with the least shot.