Absolutely hate the campaign, such a chore, enjoy the other modes too, love arenas! Unfortunately the game forces you to play campaign to get extra birds to play arenas. Push myself to unlock 2 of 4 extra birds, past 3 days though in arenas its been the same 2 extra birds required, of course the 2 I haven't got! Cost me a clear lead in the weekly arena challenge. Terrible balancing.