Thank you.
I personally tried to make a github account back then, but none of my bug reviews would go through...

Here are some things I think should be added.
The ability to add animated backgrounds. (all animated gifs/png are static)
I don't know what you're limited to, but hopefully that is something possible.

add slideshows for multiple images and videos if it can be done.

Be able to override the middle click to work on right click when clicking on shortcuts.
I understand this is a very specific thing, but some people might not have a middle click.

You should add a css editor.
I tried to use my usercontent.css to edit the background more, but it doesn't work.
I like to use image-rendering: -moz-crisp-edges; image-rendering: crisp-edges;
because it makes smaller sprites look better.

Have the clock on the regular screen, instead of just on the zen mode.
Be able to disable the fade if desired.