In the first part of the series, Doodle God, you had to create the whole universe based on four elements. Now, in Doodle Devil, you have to destroy your creation by inventing sins and causing chaos.
There are a total of 100 elements which you can discover and all of them will appear out of the seven deadly sins and the combination between them. You simply have to click on the element you want and try to combine it with another one. If it works, you will see what you've accomplished. If not, the elements will shake and you can try again. Everything appears on the screen and you just have to go into the right category if you are searching for an element. If you don't know which ones to combine, you can go by trial and error or you can simply click on the hint button. Either way, you will eventually create something interesting, such as a werewolf. Doodle Devil might seem simple and straight forward at first, but once you have 50 or so elements in your pocket, you will find it hard to discover the rest. This is where your imagination should kick in, so start shuffling through the things you've already discovered and figure out what might match. Your score will gradually increase and you might even finish the game.
Doodle Devil is a great sequel to a very interesting game and it will certainly put your brain to the test. Don't give up and you might be surprised to see what this game has to offer.