At least on AMD systems like Steam Deck and my Desktop Linux install, it seems like the demo of RoadCraft from Saber Interactive / Focus Entertainment is quite broken.
Motor Town: Behind The Wheelok it isn’t about building anything, but if you want to drive big trucks and do jobs with them than Motor Town is what you want
For some alternatives check out
Construction Simulator
https://www.protondb.com/app/1273400
Out Of Ore
https://www.protondb.com/app/2009350
Hydroneer
https://www.protondb.com/app/1106840
Gold Mining Simulator
https://www.protondb.com/app/451340
Motor Town: Behind The Wheel ok it isn’t about building anything, but if you want to drive big trucks and do jobs with them than Motor Town is what you want
https://www.protondb.com/app/1369670
Snowrunner same point as Motor Town lol
https://www.protondb.com/app/1465360