Ok I checked your quiz and found there were not questions set in that quiz . It looks like you forgot to save the questions to the quiz .
Please note that in front end course creation it is very important to save everything at every step .
I also noted that you did not set any duration to that quiz also .
refer :
http://prntscr.com/h8je5b
PS : we tried to make things simple and easy as we can for instructors in front end course creation . For once please just go through this video .
https://www.youtube.com/watch?v=VxP59vTO5Ng&t=119s