My game will have a dark and bright background. It will have some small animals like rodents or lizards.It will have some small shrubs and a few skinny trees and some sand dunes. These objects will make it feel like a real desert. The sun will be setting on the right side on top of a dune. Maybe some tumbleweed on the desert floor and large cactus's in some corners.

In the sand I will hide the bone parts of a legendary spinosaurus. It will be scattered across the plain. Under a rock, in a cactus, behind a sand dune. I will hide the bones in many places that it will be hard to look at.
I might try to add some sounds. Maybe the roars of a spinosaurus or old western showdown, maybe the sound of a tumbleweed going across the wind, or the simple sound of the wind rushing by.