I am unsure as to why you have issues with a gradiented sky
It burns.
I don't appreciate having my graphics compared to rabbit feces when I anyone can see that that is very unlikely a choice especially in the context of a beautiful rainbow world.
Actually I don't think I can deduce much from the environmental context, I can see flying glowsticks or possibly monocles, grass which appears to not obey the laws of physics, toxic waste barrels, a mutant tree grabbing the toxic barrel, a tree that has gigantic realistic flowers growing on it with confusing ambient lighting that's growing on the side of a floating island, a sign showing mech schematics, and a portal? I'm genuinely confused about what kind of environment this is, based on the context pretty much anything I said would be feasible.
You can find this out if you'd do a little adventuring in nature yourself and if that is impossible where you live then you can study some photography books. Sometimes seeds fall near the edges of things and yet they still grow
The roots that are on the top of the platform don't appear to go into the ground at all. And the roots would certainly not be able to penetrate metal, which appears to coat the whole... bottom and sides of the floating platform. Also both of the trees are off, perspective wise.
The grass really arose my suspicion because the quality of it is far better than the rest of the image. It definitely looks like it belongs in a Mana game or some such, the rest of the stuff doesn't really live up to it... at all. Unless you have a technique for drawing grass, or you know the
how and not the
why.