It was the first thing I downloaded when I got my smartphone a couple months ago. I played it for a couple minutes and I couldn't really understand what all the fuss was about. Does it just continue to be a slingshot game where the levels get more complicated? Or does it end up changing a ton throughout the different levels. I only played until level 3 and then got bored, but I will admit that it looks like there is a TON of content for people who enjoy it.
Although I should add that I only got the games because they're free on Androids. I'd consider it a waste of $1 or however much it actually costs to buy.
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http://soundcloud.com/thundersheep/pandora
http://soundcloud.com/thundersheep/the-first-year