Wow, this is a lovely image! I love how it is both backlit and front lit in different places. More black? Perhaps, but I think it is well balanced and doesn't need the negative space for interesting, balance, or anything else.
I really like this shot a lot. The colors and focus are simply stunning. I think maybe a little more black on the ride side will help the balance a little bit. For some reason, the overexposure really hits well with me. I think it is because it gives more range in the color yellow, going from dark to light (nearly white). It adds nice contrast. Very nicely done!
;D