The bg seems a bit too blurred to me and the colours don't really match the ones of the render. The render itself looks good, I like the darker colours of it. Never seen those in an original wallpaper, so did you add a filter over it? But yeah, maybe change the bg a bit, add some more flow to it, work with some brushing and smudging perhaps
Make the color of the background and render flow together and work on the text. Other than that, good.
