I’ve gone through Gnome 2, Unity, Cinnamon and nowadays tend to favor KDE and honestly, I pretty much always try to replicate a traditional experience no matter which of them I’m using, so pretty much the opposite of what you’re asking, I suppose. I’ll say I did appreciate the top left corner quickly exposing all windows, so that feature I try and replicate whenever possible.
My go-to is Vampire Survivors! Default runs are 30 minutes long but you can make them as short as 15 iirc all the way to endless. Mindless enough that you can zone out but you can get more involved if you want.