Here's a sloppy PO, where tried a different color feel. Using new iMac... this image would be too dark and saturated on my old monitor.

Some dark girders behind in the crane arm, rather than light ones.
I'd prefer to see some texture in the rock. The BG copper lines could be figurative.
Flat colors which make a strong silhouette.
I wanted some shadow under the grass, so the grass isn't pointing sideways toward the viewer. Maybe some flowers could be put in the grass to make it interesting.
Everything was the same saturation level, so I added a saturated little blue thing on the water coming out of the pipe. It's often preferable to keep saturation down, that way certain areas can be made special with dots of saturation. It's like a movie... a script can't be completely event-less, and it can't be just explosions either. An explosion is much more effective if you have an event-less period, then some suspense, then BAM, an important thing to attract attention.