Aesthetically I like it, but there are a lot of problems with the lighting.
What were they mining on the left, skulls?
The lanterns at the back don't seem to cast any light on the rocks around them. Also, the ladder's shadow is totally flat, like the rocks are actually just a wallpaper. And the ladder's shadow direction isn't really consistent with the rocks' lighting anyway, nor is it consistent with the lighting on the ladder itself.
The pixel scale on the machinery on the right is all over the place.
The machinery and the lanterns cast no shadows anywhere, so they don't look really grounded in anything, just kind of hanging in the void there.
The front diagonal wood beam on the left, what is lighting its left side? There's just a wall in that direction.
For that matter, what is lighting the minecart from the left? The general lighting pattern on the back wall suggests to me that it's curved and the scene is lit from the right or front right. But the minecart's front/front-right is dark.
