I just gave it a quick glance through. If I find the time I will give some better C+C, but for now I only have 2 things.
1) Advice: add flowcharts when you talk about the process of gameplay and choices in processes. They make everything a lot easier to read.
2) Question: I can't really get a good understanding of the overworld. Is it something like Golden Sun, Final Fantasy and Zelda II games, or is it more like the overworld in MC, ALttP, LA.