I'm not fully versed on the technique but I understand you are to add something to the water (gelatin?) to make it bead on the surface better for a photo. Otherwise, a bit more color saturation and possibly a dark or less busy background might improve this shot.
If you had Photoshop (which I don't) you might try blurring the backround more, I think it distracts from your main subject. Still a good image though.