Use Bungee Zombies to get rid of Magnet-shrooms and Cacti when you have enough sun. Then, use Buckethead Zombies in rows with heavy offense and Balloon Zombies with even heavier offense. However, do not use Balloon Zombies in lanes with Cactus nor Buckethead Zombies around Magnet-shrooms, otherwise, they will be wasted. Use a Bungee Zombie to remove them before you send in a Balloon Zombie. Never send a Balloon Zombie at the start, even if the lane has no Cacti. You will lose immediately.