I use Wayland exclusively, but unfortunately I don’t think I have an answer for you since I’m not entirely familiar with this idea. Is your concern just for the configuration of a universal set of hotkeys configured within the compositor rather than a desktop environment?
I wasn’t aware that x11 facilitated this. I’d have figured keyboard mappings are abstracted from the compositor and left to the DE to handle, aside from core binds that allow dropping back to tty
Important note is the demo was never available for download through steam, only via the website of the listed developer. Valve/Steam have only removed the store page listing.
TechCrunch’s writer here just appears to be lazy as hell. Here’s a better article: https://www.thegamer.com/steam-gets-second-game-in-as-many-months-that-adds-malware-to-your-pc/
Honestly the Reddit thread is the best of the bunch though if you want more details