It depends on how much you want to do, really. I finished my first playthrough in around 3 hours, and then spent around 1 or 2 more finding the ties I missed (I can't even begin to imagine where Ch3wy got his 40 hour figure). The game also has achievements that are actually somewhat interesting, in that they're kinda puzzley in nature and give vague descriptions and let you figure out what to do in each level to reach them, which I thought was a nice change of pace considering how many games' achievements are just "You pressed start! Congratulations!" and then an achievement for beating each level. I'm currently at 9 hours, from doing all of the above. So as far as the game itself I'd say it's kinda short and not necessarily worth how much they ask for it, but there are ways to stretch it out. The game also supports the Workshop, but at the moment there are only a handful of stages on it.