I love your painting style!
However I think the colors are not really working. Everything is kindof desaturated and flat, and the whole scene is too monochromatic I think. I feel like you could push what you see in the concept in order for your work to pop out some more. For example, the crates, barrels, and chests could be warmer, deeper browns, while the planking they sit on top of could be a little more desaturated and dry-looking. I see some greens, and a little purple in the stone textures from your concept, which you could also push, especially in the stones that are in the center circle area. The roof could be more mauve. In general you could try to use all the greens, purples, and browns throughout the piece for cohesiveness, but more of certain colors in certain areas (that make sense?? haha) The metals in your scene seem to be a pretty dull gray when I think it would match better with everything to be a more gold color, but that is just my opinion. Also I might point out that the spec you sortof painted
in on those big brown floor stones kindof makes them look like bronze - maybe it shouldn't be quite so pearlescent. Keep going, good updates!