No, clusters are groups of connecting pixels that are exactly the same colour. If too many pixels are unconnected to other pixels of the same color (i.e. isolated pixels), it often looks like visual noise. This is related to bad dithering, which you can read about here. Hope that helps!
i see. i may try one again. By Bigger clusters what do you mean? increase the size of the art a bit?
Nice colors! Maybe this would be improved by using bigger clusters and simplifying the shapes a bit. :)
okay. thanks a lot XD