Free form question with no correct answer

I've got a solution in Storyline 360, for what I think was the original problem.

I created a Freeform Question - "Pick Many".
Deleted the "Wrong" and "Try again" layers.
In the form view, I made none of the answer correct.

For the 'Trigger' of the 'Submit Button' I told it to "Show layer Correct, when the user clicked submit".

Now, no matter what the user picks on the screen, it will always show the "Correct" layer when they submit, and they can progress.

I am using this feature as a checklist for users to tick / toggle what they have learnt about in that section.

I hope this helps some of you.