The only thing with a course that could be reversed is that it would have to be very contained. Tees would have to be fairly close to the greens and basically parallel with them. I mean, there is no way you could do something like play from the first tee to the 17th green and then walk/ride 20+ yards back into the line of play in order to play your next tee shot. And it would also be a complicated build because now, rather than one landing area or one set of hazards or even one set of green contours, you must have two of each and the greens must be equally approachable from all angles. Not to mention the clubhouse could not have the holes playing out from it like many do, it would have to be fairly set off from the course. This could be done, to be sure, but it would be incredibly difficult to pull off well.