The point of the game is to survive and build the Flying castle, leave the danger zone full of zombies. Collect more resources (wood, wool, stone, skin) to build the Flying castle (wings, balloon, castle arms, etc). The more resources you collect the more quickly you will build the Flying castle and leave the zone full of zombies. The more boxes you will destroy the more quickly you'll be able to buy better weapons. The Flying castle also will help you kill the zombies. Collect and use stars to update your skills (speed, life and magnet).