Rovio spreads its wings with new game Rovio has revealed details of its first new game that is not based on its hit Angry Birds franchise, a key development if the Finnish company is to build on hopes of an initial public offering next year. As it announced on Wednesday that gamers around the world had downloaded Angry Birds more than 1bn times across all its platforms and versions, Rovio released a brief teaser video featuring a blond-haired boy surrounded by gizmos, including balloons, scissors and a pulley mechanism. Rovio did not reveal further details about the game, saying only that the images were a "sneak peek of what's coming up next," but eagle-eyed gamers identified the game as Casey's Contraptions, an independently developed puzzle game for Apple's iPhone. One review quoted on the game's website described it as a "physics puzzler more fun than Angry Birds." With a base of hundreds of millions of apps on platforms including iPhone, Google's Android and Facebook, Rovio is in an enviable position to market and distribute future releases but would-be investors will be keen for the fast-growing company to prove it is not just a one-hit wonder. Rovio developed more than 50 games before its winning formula took flight with Angry Birds, becoming one of the best-selling iPhone apps of all time. Linking to Rovio's video from his Twitter account, Noel Llopis, co-developer of Casey's Contraptions, said: "The cat is starting to get out of the bag." Mr Llopis told followers that his small enterprise remained "happily independent," suggesting Rovio is licensing or publishing the game, rather than acquiring it. Rovio this week heightened speculation that it may seek a public flotation in Hong Kong or New York next year as it reported revenues of €75.4m ($97.5m) for 2011. Angry Birds Space, the latest instalment in the smartphone series, was downloaded more than 50 million times within its first 35 days since launch in March, at the same time setting a new benchmark for merchandising an app with the simultaneous release of toys and books. Niklas Zennstrom, the Skype co-founder whose Atomico Ventures is an investor in Rovio, has described Angry Birds as a successful franchise akin to Mickey Mouse or Super Mario. But Walt Disney and Nintendo succeeded because they were able to build upon those early hits with subsequent titles. Piers Harding-Rolls, games analyst at IHS, a consultancy, said: "Angry Birds is a powerhouse of a franchise, yet a company with ambitions to go public needs to develop a full and well-balanced portfolio of successful properties to offer a sustainable growth story to investors." By apparently licensing the rights to Casey's Contraptions, Rovio seems to have chosen to bet on an existing third-party game that has already shown promise in the market. However, its executives have previously suggested that it is also developing its own new intellectual property internally.