I have been using Linux since '98, and have been playing STK since it came out - keyboard only, no controller.
I have replaced some of the default sounds, just for my own enjoyment.
I just play Single Player Intermediate, both time-trial and standard race with default number of laps and ai karts. I try to beat my best times on all the maps, and X-Kart 1 is one of my favorites.
I just today decided to record it, and after recording a couple of practices, I beat my record! 1:27.923. I put a video of it up on peertube. I hope that is OK to do.
It's a private link: https://video.fbxl.net/videos/watch/a30882ff-4e57-40ca-8d20-0a69576ebc15
I'd love to know if my time is any good compared to other people who play STK.