The possibilities with this technique are endless.
I've had a lot of fun playing around with a few different effects, but thought I'd start by sharing a revamp of my "Atsumi the babysitter" opening slide.
Thank you to Lauren for inspiring me to use the player menus to add an "About" and "More" link to pages on my Wordpress e-Portfolio. I don't generally use any of these features, but I think they're worth exploring. As with most things in Storyline, you can customise the look of them and I think the fact that they can link to external sites is quite handy.
Anyway, here's the link to my first submission for this challenge:
https://dl.dropboxusercontent.com/u/31851006/%23117%20VISUAL%20DESIGN%20TIP/ELHChallenge%20%23117%20Atsumi%20-%20Storyline%20output/story.html