Angry Birds (video game) was being played, the staff liked the characters, and the team elected to design a game around them. In early 2009, physics games, such as "Crush the Castle", were popular flash-based web games, so the Rovio team was inspired by these games. During the development of "Angry Birds", the staff realized the birds needed an enemy. At the time, the "swine flu" epidemic was in the news, so the staff made the birds' enemies pigs. Angry Birds was the studio's 52nd produced game and on its initial release, the game did not sell many copies. After Angry Birds was a
Angry Birds (video game) Noble announced that a future update for its Nook Color e-reader will let the Android-based device run applications, including a port of "Angry Birds". In June 2011, Rovio announced plans to partner with Roku to include a version of "Angry Birds" on a new model of its Internet-connected set-top box, the Roku 2 XS. In May 2011, an in-browser HTML5 version of "Angry Birds" was released in beta form. The game uses WebGL or Canvas and is distributed through the Chrome Web Store for use with Google's Chrome web browser. It runs on any WebGL- or Canvas-enabled browser, and features