ok, I've studied all the photos. I like the latest the best. But I see just a little tweaking needed. I see it being too crowded together. I think if you move things out more so it appears more random & less symmetrical it would look better. The right side is too aligned, I'd move the orange one out further into the corner. On the left, I think I'd change the black fabric on the pink cube from a solid black to a print of some sort so it wouldn't disappear into the background. Upper left, I'd move one of those cubes closer to the corner. Other than that, I see you're having a lot of fun with this, please let us see the finished product!