It's not actually a decimal (if it was, it couldn't even have two decimal points). It's version 1 of the game, version 1 of updates, and it's their 10th beta on the way to version 2 of updates.
Can't. I got GOG too, but since this is a "beta build", you can only get it on Steam. You and me just have to keep waiting for the actual release. Hopefully soon, @philo?
Nah, it's adaptation. A bird with one leg figures out how to get around by jumping, a dog with oddly sized legs figures out how to run on them eventually. It makes sense to me.