If I like a game on PC then notice it’s mobile controls suck the developer should know that I disliked his mobile version, not his PC version.
Make a seperate voting system for PC and Mobile. They’ll just use a different database or something so you can know that ‘hey this game is great on PC’ and ‘wow this have has a 26% rating on mobile’
I’d say a good chunk of my games dislikes (although there are few) is because the game is not entierly compatible for mobile. Even with that being told to the community, throughout the day there is always a good 20-50 people playing it on mobile only to be disappointed it doesn’t quite work. I don’t know if I’d want my game to have an extremely low rating on the mobile game page in case if I decided to port it, but I’d rather my actual ratings not be tanked by those who play on a very low supported device.