I personally like the rough style
I think it's hard to pull it off. something looking rough and unfinished without lacking. It might be a preference to some to like a clean finished look, but your work definitely works most of the time. I do have to say I'm not completely liking some of the color choice. the yellows seem to have replaced any brown or fleshy colors, but in this case it doesn't seem like a light or lense filter effect. it just seems like Tesla was a simpsons character. I'm not bothered b it. it's interesting to see such a dramatic scene with very stylized coloring and characters. I just feel it needs fine adjustments there.
My favorite part is the composition. I'm surprised you didn't go for a wide screen approach but this format fits the composition perfectly. the chest framing his head and the cables hanging are completely awesome. I dunno if i'm digging symbolism where there is none, but i get the sense that this robot was and idea(invention) he finally got out of his head but something about it is bothering him (thus the cables). correct me if im wrong. All in all, congrats.