Hey thewizard. Here are my recommendations.
For the forge, I would add more to it. I would add some black coals and hot red burning coals. I' don't know too much about pixel art but I think the bottom of the forge doesn't look perspectively good. The straight flat bottom just looks odd. I think it should be circular just like the top. More contrast in the colors too.
For the blacksmith characters maybe some additions our edits could make them look more blacksmith-like. Maybe you could add a simple helmet or a small hammer in their hands. Or maybe like a more ornate bulls head helmet. But keep the simple brown robes, no armor.
Just my thoughts. Hope they help! Keep it up!