Players have now slingshotted more than 100 billion virtual birds in the game 's many versions . `` Angry Birds '' creators plan a cookbook of egg recipes . `` We built 51 games before 'Angry Birds , ' so it was n't an overnight success . '' Comment:
Players have now slingshotted more than 100 billion virtual birds in the game 's many versions . `` Angry Birds '' creators plan a cookbook of egg recipes . Comment: