nice idea... would have liked to see the white background more white ... (more than 245) I would have extended your DOF to the tip of the brush ...its ok that the brush it self falls off
5 - Don't mind the concept. The white base/lighting/something isn't enhancing the image nor colors as well as perhaps a different color (difficult) may have. Might just be the lighting though, not sure. Like to have seen perhaps a little sharper angle/perspective, with less brush handle and label detail on the bottles, and more on the colors/paint, if that makes sense.
I would have tried to have a bit better focus on the pencil. In this way, the main subject is distracting.
Nice idea and colours are good.
The corners of the photo seem a bit darker (vignetting) and should maybe have cut a bit more or but a bit more light in the picture.
interesting shot...when you look at the tubes, sometimes they look like they are on the bench other times they look like they are in mid air...it's one of those shots that trick your eyes - especially the red tube...good shot