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 must keep the characters relevant until then, by producing sequels or new ports of the original game. "Angry Birds Toons", a TV series based on the game, made its debut on March 16, 2013. "Angry Birds Toons" is released through third-party video distribution platforms, including Comcast's Xfinity On-Demand in the US, Samsung Smart TVs, and Roku set-top boxes. It is also available in a number of countries on traditional television broadcasts. "Angry Birds Toons" is available on mobile devices by an additional "Angry Birds Toons" channel on all of the "Angry Birds" apps homescreens. DVD version for the TV series