I have never had a problem with this game. It gives you prizes throughout the game but I was in a battle to get gold bars by collecting birds...I think we were up to 1,200 when guess what? The game only goes to world 1715 so I got screwed out of the right to play and the game won't let you go back to other worlds to get more birds. I wasted about $12.00 so I could keep playing. Last time I put money into a game. IT IS A FUN GAME BUT IT ONLY GOES TO WORLD 1715....I JUST WANTED EVERYONE TO KNOW!