Custom Quiz App

I was looking for a way to build a quiz in sharepoint and I found a sample solution from Office developer Center (https://code.msdn.microsoft.com/office/SharePoint-2013-Test-04cc6422) that I will try to customize.

Required additional features are limit timer, result data export, assign users to a test and send them notification if they haven’t completed the test.

Do you have any suggestion about how I should implement the notification (use workflow?)