Level 5-11 is a bonus level and also the eleventh Roof level in Plants vs. Zombies: Journey to the West. The player must pay 20 gems to gain access to this level. To complete the level, the player must not spend any sun in 45 seconds.
Ladder Zombie and other zombies behind it can easily pass through the player's defensive plants unless they remove the ladder that it places.
Bungee Zombies will take away some of the player's plants and bring more zombies in the final wave.
The objective, however, will not be a big problem with Hero Plants.