The only difficulty in this level is all the zombies featured in this level have slightly higher health than normal Mummy Zombies.
Conehead Mummy x1
Health: 4586 Fighting Power: 457 First Strike: -- Features: Skill: The zombie uses its bandage whirlwind to attack, posing a threat to enemies in front of it. Leader Skill: [Primary militant high]
Flag Mummy Zombie x2
Health: 3780 Fighting Power: 452 First Strike: -- Features: Skill: Waves a flag, encourages zombies, heals the three lowest health by percentage in the zombies' team. Leader Skill: [Primary militant high]
Drag the plants you need into the lawn and you should win. Using other users' plants is recommended, as you will have more power.