Came here to see if the dev had added a gallery yet, ended up reading a tonne of strange misinformation about posture and depression; depression can be caused by a lot of stuff, but crossing your legs isn't one of them unless you've already got a tonne of stuff wrong with you already, or you've been sitting like that completely still for several hours and have way worse problems than just crossing your legs. Posture is important if you sit for long periods of time, but like, I doubt many people sit with their legs crossed non-stop the entire time they're sitting, that'd just be uncomfortable.
A sedentary lifestyle can definitely contribute to depression though, so sitting in general for long periods is bad for you.