Developer : Elite Games Release Year : 2010 Price : Free <Flash Game>, 0.99$ <iPhone>
Combine Elements. ... That's all.
Elements + Elements = New Elements.
I thought 'Combine Elements & Building some Town & Do Defense', but I was wrong. It's all about 'Combination', nothing more than that. Surprisingly, it's very fun. You could try Flash version of this game, and got hooked as I do.
But the Genius part is Business approach, 'Flash = Free & iPhone = 0.99$'. Of course, there were some good Flash Games ported into iPhone, but this [Doodle God] was made at once(not later). That could be another kind of good Business trial, even if can't be used for every games. At least, I paid 0.99$ after 5 minutes with Flash version playing.