Interestingly weird focal point and composition. For stock photography, I think the message is supposed to be as blatantly clear as possible... so for that I might have done this in color, kept the heart right side up, and made it the focal point of the composition, probably zooming in to just the heart and the point embedded in it.
I think I would've liked the fins in focus here. Then again I didn't recognize the heard shape right away either, aybe because i was upside down? Creative, but missing a focal point somewhere. The only thing in focus is the middle of the dark which is not very interesting.
I like the concept and think it could have done well, but strictly, there's too little depth in it to have a clear heart shape. I'd like the arrow to stand out of the image, which it would do if the DOF was sharp at the bottom, and the back of the arrow was less sharp.