Crafting Game Prototype

This is a very early prototype I have been developing in my spare time for a crafting gameplay idea. The (ambitious) goal is to make the crafting part of a MMO, RPG or survival interesting enough to be played as a stand alone, without taking part in any of the fighting or world exploration, just essentially do the job of an NPC (here a blacksmith). If I can achieve that then I could draft a mobile/online RPG where players can be truely be dedicated to one job. Either fighter, blacksmith, tailor ...