I'm looking for feedback on my spaceship (lineart, colors, light and shadow)

[Machinarium]

As the title says. I've been drawing for a couple of months now. I am currently focusing on lineart, colors, light and shadow. I'm going through some personal stuff right now, but my plan is to start with learning how to do proper backgrounds and composition soon.
What would you say about this piece? I'm looking for feedback mostly on proportions, shapes, lineart, colors, light and shadow.

Thanks a lot for taking the time!