| http://www.w3.org/ns/prov#value | - items, such as paint bombs, boosters and the mystery box ??? Complete challenging missions to unlock new powers such as the devastating dark powerbird ??? Choose a superbird companion and level them up - Each one grants a different bonus ??? Collect and level up all the superbirds for huge bonuses in the game ??? Trade hearts with friends and compete on the weekly leaderboard ??? Find the hidden
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