Imangi Studios' Keith Shepherd and Natalia Luckyanova have been making solid games on iOS for years now, from their original hit Harbor Master and their charming dual-stick shooter Max Adventure. But it wasn't until Temple Run this past year (which I first saw in an off-the-record prototype form at GDC last year) that Imangi really hit it big. The freemium game has over 40 million players already, and it's consistently sitting up among the top-grossing spots on the App Store. Imangi's perfectly happy with that success, if not a little overwhelmed by it. "This is ridiculous, what is happening," says Luckyanova. Temple Run actually came at a great time for the