> I can't think of a single mobile game that has any artistic value to me

Monument Valley

https://en.wikipedia.org/wiki/Monument_Valley_(video_game)

I guess I don't ascribe particularly high value to the category of games, I think even very simple games designed to take money from the player count. But I do agree on the mobile vs PC divide broadly in terms of what's on the market. I would actually cite Civ as a series that's still trying hard to do engaging things, in the form of constant but varied puzzles with intellectual complexity which reward planning and forethought.