One small observation: I've installed the game both on my iPad and my iPhone and where the iPhone's UI seems well polished and efficient, the graphics and layout on the iPad seem clumsy, like an afterthought.
Not a deal breaker by any means but certainly a pity in that it may turn some people off.
Hm, I cannot compare the graphics from my iPad with an iPhone, because I dont have such a phone, but on my pad2, the graphic seems very well to me.
The IOS Implementation of the game is a really good work. I agree with your quick review.