★Defeat enemies to get gold Gold is in using to buy various arrows and skills or upgrade weapons.
★The most vulnerable parts is the toppart Shoot toppart will defeat enemy in on shoot helmet can protect the head.
★Different enemies have different attack mode you need deal with them in different ways.
★Upgrade weapons and towers buy arrows and skill challenge more difficult stages.
★In rush mode the enemies is infinite kill more enemies as you can show yourself in the rank list.
It is always a good choice to upgrade weapons when the enemy is getting strong.