"Make me a gnome shell extension to turn the desktop background into an animated ocean with a shader. Make mouse movements make new waves"

"Make a gnome shell extension to make something like esheep or bonzi buddy which will walk and climb on windows. Put lots of funny joke actions in"

"Make a shell extension which will let me lock the screen until my password is entered, but still allowing VLC to be viewed and spacebar for play pause and volume buttons to work"

I don't publish any of these - just for my own use. About half of the extensions work on the first try.