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A popular game from 2013 where you must tap a bird to dodge pipes. Many clones & fangames were made because of the original game's success. 

Ludum Dare is a 48 and 72 hour game making competition globally hosted over the internet; Ludum Dare 34 ran from December 11th to December 14th, 2015, with two combined themes, "Two Button Controls" and "Growing".