I love this game. But I cannot give it more than 1 star because they are STEALING from users. When you watch a 30-sec ad for a puzzle hint, it fails with an error after you watch the entire ad, at least as often as it works. This is not an occasional fluke--its a persistent, longtime issue. There are 2 possibilities -- it's a bug they are leaving unfixed, or else its deliberate. Either way it dramatically increase their revenue at users' expense. Its unacceptable and dishonest af! SHAME!