It's one of the first games by Lucas Pope (Papers Please, Obra Dinn). But if that's not enough...
Far more accessible than you'd expect a car mechanic game to be, its simplicity paves the way to a world of joyously tactile puzzles, each faulty vehicle a small mystery to be solved through disassembly, examination, targeted repair (or replacement), and reconstruction.
You don't drive the cars, just fix them. And for all the qualities of the more recent Car Mechanic Simulator series, those can be a little overly involved. Maybe a simple fix-em-up is all you want; hopefully you can find out with GOG's help.