i don't know if this is against the rules or not but it sure seems like it, idk why
The deco isn't amazing, but it's good! Try a varying the color more so it doesn't look so flat
Make the main chassie a gradient from top to bottom dark gray to darker gray (make it shiny ish). Then you should probably change the color of the metal that makes up the guns. You have way too many wheels on that thing unless you are doing a tank, if you are doing a tank then you are doing it all wrong. Search tank tracks on google and make those windows a little less angular and sharp... Too much work. Do what you want.
its better than what i can do
it's interesting, some kind of futurist train