Hi, yeah, this is basically the 4,096 colour palate in this screen I've constructed, though it was taken from screen grabs of the menu in 32,768 mode.
I don't think it would be easy to build a screen of what the demo reckons it's displaying in full 32,768 colour mode. My understanding is - and this may be wrong!? - that the way it achieves 32,768 is by rapidly switching the palette. Screen grabs are doomed to failure as they only ever grab one point-in-time palate. I took these grabs while running in the 32,768 menu, but when you view at the menu in real-time, you don't see the defined bands of colour, yet when you look at the screen grab you took, there they are!