Restricted Scene Advancement

I have a project that has a menu page and a number of scenes.  The user is able to advance through and choose each scene topic freely.  I would like for the user to have this option for all scenes except the Post Test scene and I would like for all scenes to be complete before the Post Test button is clickable. 

Can anyone help me with this? Is there a particular condition that would allow me to do this?

1 Reply