you need more practice to increasing your creativity and MOCing skills.BTW, for the MOC :The concept is very good, but the build is kinda plain, maybe you should add custom body and limbs. And there are some color clash - lime - green - dark green - dark grey - metallic silver - and silver. , you should use at least 3 colors to keep the color scheme, example : green - metallic silver - lime.That's all what I can share, learn more from the other MOCer and keep practice. :DGood luck with the rebuild