Can I create a password on the form so you cant continue filling it out without it?

You may consider using show/hide conditions to display the fields on the form based on the answer. Please refer to the guide below that can help you with setting up the Show/Hide conditions.

https://www.jotform.com/help/196-Hide-or-Show-Multiple-Fields-at-Once

Please note that we do not allow collecting passwords or any sensitive information on the forms. Please go through our terms of usage for more information on phishing. Using Password as a field on your form could trigger our anti-phishing filter to suspend your account. You may consider using something as 'Verification code' or similar.

Hope this information helps!