Good start, I hope you dont mind that I played around with it to better explain my thoughts.
Here, I have just flipped it upside down, and added some color. Whole new effect.
Here, I moved things abit round on the original, and again added some color.
There's tons of things you could do from that one, just play around with the shapes you have, and try not to have it solid black, because that gives a kind of military feeling.