Does the promise of a new type of game play interest you? Well don't get your hopes up, because by destroying the world what they actually mean is creating a bunch of new elements. These elements you are a assured will destroy the world for you. Gotta watch out for nasty things like Friendship and religion, they will apparently destroy the world. The point is, if you enjoyed playing the original game, you'll likely enjoy this.
The game play is clicking two elements to create new ones. Some are logical, such as computer and computer creates internet. Some are attempted social commentary such as television and human creates zombies. It does prove that you are better off using the internet than watching television though, you still become a zombie, but you get friendship too! Some combinations only make sense in hindsight such as human and copyright gives you lawyer. Some don't make any sense to me whatsoever. Rat and air creates dove. I've heard pigeons are the rats of the sky, but I never heard doves lumped into that category. Hints are obviously really useful in this game as a lot of the combinations did not seem logical to me at all.
Additionally, there is currently as of 11/8/2010 a bug with the hint system. When I only had two elements left, the hint that shows you some of these elements may combine brought me to two categories full of elements, none of which reacted to form new elements. I dutifully kept at it, eventually testing them all. It put me to brute forcing the last combinations though, which isn't a ton of fun.
This game is not connected with an achievement network yet, so there is no way to show off your progress. You can, however, spam your element creations on Facebook, if your are seeking a way to get your friends to hide your status updates. Clicking extras will let you download two images to your phone. Under credits you can donate an additional 0.99$ whenever you feel like it.
If you love Doodle God, and want to play what amounts to one chapter of the same game for the price of four with no mini-games or achievements, then this is for you. In their defense they have promised to update both games, but as of right now, I say just stick with Doodle God. The mini-games and quests are needed to avoid boredom from setting in.