Angry Birds continues its explosive growth. Almost 21 months after its December 2009 launch, the bird-flinging game now boasts of 350 million downloads and over 300 million minutes of gameplay each day. And its merchandising side is seeing similar gains. According to Andrew Stalbow,Rovio‘s General Manager for North America, monthly sales of plush toys and T-shirts are now in the millions. Not resting on its laurels, the franchise is readying two new games for release by the end of the year and is working on new features like geolocation to spicen things up.