with the reflections and highlights on the orbs - the main highlights look like they are coming from a light source 90 degrees ^ thataway
but the highlights are off to one side, maybe put the small highlights at the opposite side of the main one? *shrugs* just an idea
love the design though and another on the textures, especially on the wall, lol, Im lacking patience with that part
Cool! If you're getting bored, try expanding shapes or even a new style. What really counts is that you like what you're doing, and that you're satisfied with the outcome. That is what makes for good art!