About your design, I have no opinion, only to say I imagine it being as good as any other style shown/designed/available or offered
--anyway nice to see the interest
Usually I think of clean wallpaper as a simple color background, that is a flat desktop onto which objects (Icons etc) can be placed
I am glad that a blank (simple color) wallpaper is available within the selections provided by Most Linux's even if they default to their preferred branding or design elements..
The reason I prefer that is that I don't want the sometimes nice design to get in the way of what I am using the computer for
--that being: applications, email, browsing etc..