Gem baiting... They have the parameters set too high that when the bird cages fall, they don't break open. In turn, you have to use another bird. And 9/10X it always happened to be your last bird. Pop up boxes are constantly posting to make purchases. The only way to get through this game is to constantly shell your hard earned money oo your pockets! If you like to spend a gazillion bucks and are insistent on making the programmers rich, have at it! Hard pass.