Talk:Plants vs. Zombies Online/@comment-27380951-20160826022147

It's been a year after the last world (East Sea Dragon Palace) and there's still no sign of new worlds. On the other hand, they got several special levels called Challenge Levels. These levels have scoring mechanics and the players compete for high scores.
 * Ancient Egypt (PvZO) has Mummy Memory challenge level, where the players must clear the level with fewest clicks possible. Each time a zombie tramples the flowers you get -100 points penalty.
 * Qin Shi Huang Mausoleum and Pirate Seas (PvZO have sun-producing challenge where the player must produce as many sun as possible in limited time.