I used to have a Windows screensaver (on Windows 95 I think?!?!?), and when it came on it showed a cartoon-looking man stranded on an island. He would do different things on the island throughout the day - fishing, making a fire, climbing the coconut tree and getting a coconut, and various humorous things. During holidays, holiday objects would appear on the island. I think this would be great in YoWindow, since I have the app open all day. You could have the user's local weather affect the island, just like you do with the other scenes...
I found a youtube video showing the old screensaver:
https://www.youtube.com/watch?v=PqXIKeTVcyA
I hope you can make my dreams come true!

Thanks!