Angry Birds (video game) crates and rocks are incorporated into the structures, and power-ups may be used to enhance the birds to attack hard-to-reach pigs. Also in the levels, players can unlock bonus levels by collecting golden eggs. There are several different types of birds used in the game, distinguished by their color and shape. In the earliest levels only the basic red bird is available. As the player advances through the game additional types of birds become available. Some birds are effective against particular materials, and some have special abilities that may be activated by the player while the bird is airborne. For
Angry Birds playing "Angry Birds" and poking each other on Facebook". He then provides a tip for Liz to improve her score in the game. In February 2011, American journalist Jake Tapper mockingly introduced U.S. Senator Chris Coons as the "Angry Birds champion of the Senate" during the National Press Club's annual dinner. Some of the game's more notable fans include ex-Prime Minister David Cameron of the United Kingdom, who plays the iPad version of the game, and author Salman Rushdie, who claims he is "something of a master at "Angry Birds"". Basketball star Kevin Durant is an avid fan of "Angry