Lots of software has credits, historically they were often hidden in Easter eggs. Small software still often credits their creators e.g. in the Help>about menu item.

But games are different, they are primarily an artistic pursuit.

Casting to Google Cast devices is pretty locked down, but most things that can cast support a handful of different standards, so casting to other things is usually possible.

Plasma Bigscreen doesn’t have the functionality natively, but jellyfin-mpv-shim and Kodi can be cast to.

I’m using this on my HTPC. It’s currently anemic but functional. I’ve got high hopes