Problem: I am tapping the correct answer, but the card doesn't score and submit. It just circles the answer in blue. In fact, it circles the wrong answers in blue too.
Why? Because you have more than 1 correct answer on the card. You may not know that you do. You may not have intended it that way. But if there is more than one answer, the student must select some subset of answers and then tap the "submit" button to score their card.
If you did not mean to have >1 correct answer on the card, look for "green halos" around items in your deck. In the editor, all correct answers are haloed in green, and incorrect answers are haloed in red.
In your card, the halos might not be as obvious as in this sample.