The design in all looks nice but there are some little things I hope you won't take it as an insult with al respect.
I have a few tips:
1. I don't like the pill-formed objects attached to the rudders. Maybe you should remove it and make the rudders much longer.
2. My personal opinion, there's too much contrast in the color being used. Maybe you should lower the saturation.
3. Maybe you should make larger textures instead of tiling and repeating small ones.