The march of mobile gaming goes on, with four separate stories showing the iPhone-fuelled growth for independent game developers. Story one: Outfit7 released its Talking Tom Cat 2 virtual pet game on Sunday, and racked up more than one million downloads on that first day alone. It’s a free app whose performance owes much to the more than 100 million previous Outfit7 app downloads – users to whom the new release was promoted on day one. Oh, and in a recent interview, Outfit7’s CEO said the company has plans to get into music apps… Story two: iPhone puzzle game The Heist has sold more than 500,000 paid downloads in its first week on the App Store, generating more than $300,000 of revenues for its developer after Apple’s cut. Word of mouth has been a big part of its success, but developer Tap Tap Tap also has a big install base from its previous applications to promote to. Story three: Backflip Studios says its iOS and Android games have been downloaded more than 100 million times in two years, with its revenues split equally between paid downloads, mobile advertising and in-app purchases. And the fourth story: Angry Birds maker Rovio has bought an animation studio called Kombo, as part of its drive to make an Angry Birds TV series and/or movie in-house.