Nice idea and good colors. I know just enough to tell you that there is something lacking in the composition and the lighting, but I don't know enough to tell you what it is or how to correct it. I hope more talented participants will give you some helpful specifics.
The gifts in the background are too important to be out of focus. The golden pack might be closer the others, that would have taken some of that empty space in the middle.
I like this idea; however, I think it would have been improved with a more three dimensional view of the box in the foreground. Top down view is a little flat.