Roll Dice with 20 questions

Hello,

I used a pre-made Storyline360 template for a quiz game roll the dice. I have 20 questions. However, when playing it only allows me to play 6 questions before it takes me to the result slide with a failing grade. I looked at the variables and the only thing I changed was to Dice number between 1 and 20 as I have 20 questions.

Can someone take a look and help me please?