Math Beginner

To start, the user has to choose the desired operation, which can be addition, subtraction or multiplication. Then, he must to choose the number of digits for the problems, which I called complexity. It is important to mention that the multiplication has only 1 digit or 2 digits options because of the difficulty. Finally, if he wants, he can enable the time option to complete the quiz. The total of questions is 10 by attempt. Each right answer gives the user 10 points. When the user scores the maximum (100), he wins different prizes, depending on the operation/complexity chosen: stars for 1 digit questions, badges for 2 digits and trophies for 3 digits questions.