It is the first level to have two huge waves of zombies. The player may not be used to having a big wave of zombies attack until the end of the level.
Levels with two flags tend to be longer than levels with one flag. However, this also means more time to gather sun.
Strategies[]
Use the traditional two columns of Sunflowers and Peashooters to defeat the zombies. Plant a Snow Pea on every lane to slow down at least one zombie in each row.
You won't be able to plant all of your Snow Peas before the first wave, but you will be okay with two columns of Peashooters as long as there are no Pole Vaulting Zombies in sight.
Snow Peas can also help slow down Flag Zombies or stall Conehead Zombies long enough for them to be attacked.
