I really loved the way the flower was shot with the shadow. However, the positioning of it in the shot seems a little off to me, like if you moved more towards one of the corners it might have been better.
This works "ok". I think you lost a little bit of detail in the flower petals somewhere in the process. Not bad, but not jumping out and saying "wow, look at this". Hope you know what I mean by this. Haven't decided if I like the shadow or not. I think it adds more than distracts because of the size of your subject in the framing of this composition. All JMO of course. :D Best of luck to you in the challenge.