Engineers on here will be able to explain better than me, but a lot of electric motors don't care which way they turn.
Microwave turntables for example are not all made to automatically reverse the next time.
Depending on how/where the motor stops it may run backwards the next time. In fact if you load a microwave so the item will foul the side on start up, it will run the other way.
I don't see how it would make any difference on a pusher though as a crank doesn't care which way it turns on something that is simply turning a circular motion into a lateral back and forth one (I'm sure there's a more technical term for that!)
I seem to remember Jowett built vehicles with two stroke engines that could back fire on tick over then carry on backwards without the driver noticing. Consequently the man behind the wheel could be highly entertained pulling away from traffic lights to discover that not only was he proceeding in totally the opposite direction to the one he expected but he also had three gears at his disposal to really get some speed up.
I'm not suggesting 2 stroke internal combustion engines operate in the same manner as electric motors, I'm just writing the way I think.