Well, it depends of what do you like, for example the ores look a bit, well, you know, "regular" in the way that they are some basic shapes, but other than that, from what I see, everything is OK. Anyways, looks really nice and I tell you, it will definitely look amazing when it is going to be done.
And for future development, I suggest that you try to make the textures JUST A BIT more complex, not that now they wouldn't be complex, but they look kinda plain.
P.S. It's all up to your style, either smooth or detailed.