Here is my idea. Although it is a nice Still life, it needs more balance to the right side of the table. You have to much weight to the left side. The bowl, the boat the guitars and the red grapes. Two objects in the middle, and when I run my eyes to the right side, there is an empty space that pulls the view to the wall. If you want to keep the eye of the viewer on the table, put a little something there, a single grape, or anything to stop the view from going out of he image. It is my idea.. at least it is what my teacher told me to balance a nice image like yours.

WOW!.... See, it is good to have friends with fresh ideas... Looks much, much better now.