All of the powerups are useless, the only useful bird is the Big Bird, because he's able to break through more than one wall. I'd use a power up on the triangle yellow bird and it wouldn't even break through one wall with its power up! this game makes you think you're doing good by giving you easy levels then they screw you over with stupid levels that require you to pay money to win, angry birds isn't worth it anymore this game is hot garbage if you think about downloading this game don't.