this is amazing

I strongly recommend that you read the rules & guidelines.You'll find very useful things there regarding of do's & don'ts about photography,
selective colouring is not allowed
It would be nice to check the "high-resolution box when uploading your entry,so we can judge your work closely. the size shown here never does the photo justice.
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If your uploaded entry was above 2.5gm you don't need to upload a larger version, just tick upload full resolution.

Lovely, I would however consider cropping a bit off the top, keeping in mind, 'rule of thirds'.