Poisonous Paradise

Poisonous Paradise is the Second World in Plants vs. Zombies: The Century Gate (not counting Space House, the tutorial world). The world is based on a forest with poisoned water, such as world 3 in Paper Mario Sticker Star. It's 24 levels long, and ?? levels long counting the alternative paths.

While Poisonous Paradise has no brain buster, starting from level 14 time and space begin to fall apart. All colors will randomly become inverted, and poison tiles will randomly begin disappearing killing anything on them starting at level 18.

Game Description
The description tells the player a bit about the world

"Escaping the Grim Reaper Zombie, the player and Crazy Dave arrive in Poisonous Paradise - a paradise turned poisonous due to some sort of plant, which has also been fusing plants and zombies together."

Poisoned Water
Starting at Level 8, there will be poisoned water which can only be planted on by poison pads, which kill any non-poisonous plants on them after eight seconds. It will disappear when you beat the boss, but will be brought back the second a player plants Poison Pad, which will poison the water it's planted on and any water tiles adjacent to it.

Time and Space
Starting at Level 14 (which goes into all other worlds), all colors will randomly become inverted which also has a chance of making zombies seem like they're stronger versions when they aren't. Poison Tiles will also randomly disappear starting at level 18, killing any plants that were on them before.