Impossible to enjoy
Card Shuffle is one of the most painstakingly frustrating games I’ve ever played. It is impossible to enjoy or get into any type of flow state due to knowing at any given time, whether mid move or trying to concentrate, that an ad is going to obnoxiously interrupt. It ruins what would otherwise be a fun game. If no one is even able to complete a puzzle before an ad comes up, nobody is going to keep playing and subjecting themselves to that. It is impossible to concentrate or get any enjoyment out of it. Just to get through the last puzzle I did, and literally will be the last, there were at least 10 ads. Finishing felt more like brutal, oppressive work than a game for recreation. Please consider an ad only in between levels or most people are going to run off screaming in the other direction until they shake off the anger and frustration enough to delete the app from their phone.