Navigation Restriction Override - Storyline 360

I have a client that requires their courses to have a restricted navigation in the menu and the allow drag after completion restraint on the seekbar. They are requesting to have a workaround/override feature to be added, so they can advance through the course quickly for testing purposes after they have uploaded to their LMS. 

I've added a key press trigger to the slide master that allow the user to advance to the next slide when the combination of the shift & right arrow keys are selected, which is working as intended.

The road block that I'm running into is trying to advance to the next scene. This same key press trigger wasn't working for advancing to the next scene so I've tried adding conditions and tapping into some of the built-in variables, but that didn't work either.

Then I thought maybe I need to use a different key press trigger combination so I created an new trigger for advance to the next scene using the combination of shift & the down arrow keys but that also didn't work.

I'm including a Review 360 link for reference & also attaching a demo Storyline file.
https://360.articulate.com/review/content/9240fddd-e29c-4394-b76f-ff35a1620c22/review

Any insight as to what I'm doing wrong or may be missing would be greatly appreciated. Also if anyone has a better method that they have used before that would be great too.