Eswube is very correct, Kattsun, there are many things that need correcting if you're looking to get it uploaded to the main site. First and foremost it needs to be on the Standard Template, which is this:
Second we have a coloring system that works rather well, as we've mentioned to multiple artists. Not that yours is bad, just we do have a standard for everyone to use and makes it easier to repaint for AU or whatnot.
And the connection between the wings and fuselage needs to either be black or a darker color associated with where it connects with the fuselage.
Again, as Eswube mentioned, it does look nice, keep up the good work.