By default, Storyline doesn't show result slides in the menu when previewing or publishing. If you want to display a result slide in your course menu, do the following:
- Create a new scene in Storyline and give it a meaningful name.
- Move the result slide to the new scene. It needs to be the only slide in the scene.
- Adjust the triggers on the feedback layers for the last slide in your quiz, so they jump to the result slide in the new scene.