Good but it is also possible to pop all pigs in a room without using any birds or spells, but nothing special appears, unlike Strike which happens when only one bird are used or Birdie happening on two birds!! So plz add something special when popping pigs in a room without using any birds. Also the rare chest, despite it says, it completely common. If you just closed the arena or terrain, you encounter an annoying rare chest that forces you to watch an ad to get it.