I've decided, after a long gap with no further work, to leave Tiny Terra and come back to it when I am more knowledgeable about how Unity works. Instead I'm going to build a simpler game, but maintain some of the gameplay elements from Tiny Terra.
The new game project will appear on IndieDB within the next few weeks. It's a bit of a down grade in complexity, this is so I can construct it much quicker and have a game finished in less time.