3D mathematics can get quite tricky and sometimes I've had to resort to good ol' trial and error. So I don't think I'll be making a full 3D game any time soon. One day!
A have started designing the menu system for Switch "2". I'm not completely happy with how it's turning out, and I keep starting again. I think it's actually easier to design menus within the limits of 4k, because the completely garish is completely acceptable. I think I might just make the menu system exactly the same as it was in Switch "1", just with a little more style.
I suppose I should get to the actual programming, before I waste up all of my creativity!