Knights vs Zombies

Your target in this game is to protect your king's castle, zombies have invaded the territory and they're destroying every thing. The warriors of the castle will have to fight with all their weapons to save the people, you must place them in front of the castle, some of them will use the sword and others the arrows. Also, a vigilant at the top of the castle will throw his lance when is neccesary, don't let the zombies win!