There are two ways to specify how the participants can win/lose your quiz (Yes/No, MCQ and MCQ1+). You can specify a pass mark or define rules. Rules allow you, depending on the score of the player, to collect the participants’ contact information, or display a result page or message.
To enable rules for your quiz, just click on the button shown below:

Once you enable rules, an "Add Rule" button will be displayed. It allows you to create a rule for the completion of your quiz. The screen to create your rule is displayed below:

You can drag the slider and adjust the range of the scores. You can choose the behavior of your quiz for each range of scores.