I like the idea of a wasteland planet, especially a little burger shack on some tiny outpost in the middle of nowhere.
Sparseness is by no means a bad thing, but even the smallest outposts will tend to clump together so that the people can get around in their towns without having to travel very far. Some homes, perhaps, would be detached from the town, but usually there would be a centralized location where you'd find your main buildings; like old villages during the goldrushes of the 'wild west'. Unless Megaburger is on the outskirts of town, I'd say it almost seems to be not crowded enough.
I also noticed a lack of roadway - if the ground is too slick or sinky to walk on, people would likely travel using some form of raised platforms, or vehicles. Otherwise, even a bit of packed down ground near the main door, and perhaps parking spaces (if people do use vehicles on this world) would likely add a bit of realism to the look of the picture.
I agree with YakSpit in that the building is a bit too thin from front to back. He already touched on the lighting aspect as well, so I won't get into that very much.
The overall haziness of the image, I like very much, it makes the planet look swampy and a bit foggy - especially by means of your blurry moon in the far background. You may want to sharpen up the foreground a bit to give a bit more depth to the image.
All in all, a cool concept that I'd be interested in seeing developed. Keep it up!