I like this much more on second viewing. Great concept.
The first time I looked at it, I didn't realize that the dump truck was hauling the dirt and trees - to me it looked like they were in the background and the truck was driving in the foreground, though the scale of the details on the soil is clearly larger than that of the hills in the background. Perhaps working out a bit of shadows for the landscape in the background to help the truck and its contents stand out in the foreground? Or changing the soil color for the load in the truck so it looks more "freshly dug"? Or a small stream of dust/dirt cascading from the back or over the sides of the truck?
Also, the way the front of the truck is being clipped on the right side of the frame bugs me a bit.
But the concept is really fun.
~Micheal
