Just a few suggestions, though I am not far into the game yet, so I apologize for any late game things that are already implemented
- Upgrades to shop and equipment
- Ability to hire and train a forge worker
- Ability to gather materials such as the boulders in sand box mode
- Ability to learn blueprints for grips ,guards and weapons
- Lore for the character
- Occasional orders like "The Army requires XAmount one-handed swords in three days" with a cash bonus per weapon and a a bulletin board to keep track of said orders, could possibly be implemented with shop upgrades.
- Variants of weapons, (hammerhead 1/2/3) being preferred by certain NPCs, long haired players might tend to prefer hammer head 2 while NPCs with glasses might prefer hammer head 3, and pay more for their preferred style. Could be a "background" thing that isn't officially acknowledged in the game but is hinted at by NPCs through chat, i.e. NPC who prefers short blade 2 is ok with short blade 1 and hates short blade 3, might say "this is excellent" for 2, "this will do" for 1 and "a little poor, don't you think?" for 3.
- Larger town, with possibly a market in it and a possible occasional fair, where you can stock weapons and sell them at a booth. Would require a calendar as well.
- Re balance of cost/vs reward on ingots
- More styles to guards and grips, more than just white/green tier attachments
- Possibility to hire enchanters to enhance certain sword aspects
- Adding repairs through use of flux or other materials
- Mixing Ingots
- Fame system, giving bigger cash rewards based of quality of weapons, speed and correctly matching variants
- VR support, this game is perfectly styled for it
I think this is an awesome game so far, and needs very few tweaks.