I hate being the one who gives the bad news, but maybe not .
Google Apps Script helps only in the process of creating the form (and editing), which is impossible to do when the user fills it out, period.
In addition, it can only do programmatically what you can do manually on the Form interface, it is only useful to help you automate what would be cumbersome to do manually. For example, adding a long list of options to a question or helping to generate and send hundreds of similar forms by email. Or just create quick quizzes or other forms that you have to create every week, etc.
Just to be completely understandable to other users who could read this. You cannot do anything with Script applications for Google Forms, which you can no longer do manually. Script applications do not add any new or hidden features to Google Forms.
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