This is not a game to test your IQ - its a game that tests your ability to be creative, and teach you how frustrating life and answers can be in hindsight. I got to the 11th puzzle, and decided this game was a waste of time. There isnt exactly an intellectual challenge, or complex solutions that most people would be looking for. Just frustrating hindsight to "their" answers, and just another app trying to make money.
If you really want a challenge, you may as well get good at sudoku or Bridge. And if you want to pay to "train" your brain, look into lumosity or one of those apps.
Gorsh S about What's My IQ?™, v4.0