★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.