While installing these from the official media packs, I couldn't get Philips Videopac+ clear logo to work, and I think that it didn't install correctly because it was spelled Phillips instead of Philips.
Not sure if this is is the right place, or if this affects any other platforms, but I figured it can't hurt to mention it somewhere.
It looks like the file names for some of the platforms are slightly off, which caused them not to work.
Nintendo 64 DD should be Nintendo 64DD
Philips Videopac + should be Philips Videopac+
Game and Watch should be Nintendo Game & Watch
Also, as others mentioned, some platforms have videos available for download but not PNG images, which breaks the animations.
Love the theme. Just trying to help out.