Differences from Doodle God
Doodle God can be played on Doodle God 2, in the form of Episode I. This appears to have been done so new players can play the first game before the second and get familiar with the game.
List of new Elements
These Elements can be made at the beginning of the game (Episode II). Elements for the first Doodle God (Episode I) can be found here.
After reaching 140 Elements, Episode III will begin, and the player will be given Commandments. They will then be able to make these Elements.