Doodle God for Windows Phone is a logic puzzle game that I consider to be in the casual game category. You can spend as little or as much time as you like and get entertainment for whatever time is spent. The game starts with four basic elements that are combined to create new ones. One goal is to create all 135 elements (really “compounds”) possible. Not all compounds are intuitive. For example, combining “life” and “ash” creates a “ghost”.
In addition to the main game play mode, Doodle God has minigames and quests. And, like other Xbox Live games, it has achievements and leaderboards.
Doodle God is priced at $2.99.
Disclosure: Microsoft provided the game free of charge for evaluation purposes.