Completing a branching scenario without viewing all the lessons in Rise

Hello!

I've created a course in Rise that has different paths a user can take. What I'm running into is the inability to show the course complete if they do not take all the lessons. Once I've taken the course in my LMS, it doesn't allow me to return back to the other courses. I have turned the Navigation off so they can't see the potential amount of lesson available nor the lesson titles. This might detrimental to the course.

The course breaks down like this:

Happy Path - 4 lessons until complete

Okay Path - 6/7 lessons until complete

No Happy Path - 8/9 lessons until complete

The goal is for the user to be able to "choose their own adventure", but my worry is if I set it to "Completion Percentage" they might be able to go down a less than ideal path for a few lessons and then leave showing complete. 

There's no quiz or storyline block so those options are out of the window. 

Any ideas to show completion for this style of course?