thanks, I'm starting at the pixel art

 I really like the design here. Looks like a cool mix between some 1950's sci fi and the Warhammer 40,000 Dreadnought. However, I think you should really reconsider the texture and the way you've shaded this machine, and the colours you've used. I think this piece has a lot of potential, and it's a shame to publish it so early.

I would work on the inconsistent light source, the linear palette (every purple is basically the same hue, instead of mixing in different kinds of warm and cold purple, or even other colours on the metal parts) and the readability on the red/orange joints.