Angry Birds has been available for quite a while now – two years, to be exact – and Rovio wants to celebrate its birthday with a new update. We’re getting 15 birthday-themed levels, bringing the total amount of levels to 300. You’ll get to play with the expandable orange bird, unlock new achievements and have all episodes unlocked from the beginning, a nice gesture from Rovio for celebration purposes. It’s all free, of course, so if you’re still hankering for some bird-slinging action set aside 15 megabytes of strage get the download in the Android market here.