Hard to explain.
Let's start with your color choices. You seem to have 3 colours on the side pedals, but 4 on the middle pedals. Why? Limit your colors, unless you need more, of course. Although, I think 3 colors is okay for that image. In addition, Adding the dark color gave the "bending" affect to the side pedals, which is great! It makes the graphic more clean.
Same go with the front pedal. Will it bend? If so, where? Where's my light source? If it's there, I think I should add this light color here.