b/w, but still prefer a non-monotone-colored version. The light effect (triangle on his arm) is weird. Too much neg space on the right, and could use some foreground effects. Also it's a bit overcontrasted. Not bad overall, gj.
I don't like it, I think you have colors being to sharp, black and white ones has the left side c4d thing sticking out a bit to much. Nice try but needs work in my own opinion.
Last two look sht best, IMO. The red just doesn't work out well. And the arm looks like it is cut off, or like it's a reflection being cut off. Nice attempt.