I think about buying this game... I was looking closely to the updates, watching some videos, reading a bit in the topics and now the demo finally allowed me to test this game myself so first of all thank you for that ! I noticed the same bug I saw somewhere, someone mentioning it on one of the posts. The black ground and hills, whole textures are black, house you can build looks fine and so do the trees and metal/stone nodes. The grass you can destroy with rake and water looks normal too its just the ground.
I also wanted to ask you something, were the crafting possibilities limited in the demo too ? I see on that chart above what was limited and what wasn't but the moment I started playing I noticed on the workbench, crafting table, campfire and the furnace... there was only limited amount of things you could craft in comparison to what I saw on the other videos.