I think the title needs to stand out more from the globe. It's a very nice blend with colors but kind of gets lost.
Not sure about the bolt going through the globe. if you lose might have to enlarge the words more to fit around the globe.
Not sure about the DJ, cool concept and does signify nightlife, but seems to be the main/center focus as it would be with some DJ contest.
Something a little more subtle, possibly?
Love the hands/people in this image.
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Would love to see something similar to this design with Bikini girl and guy in shorts dancing at beach, shadows blend into earth.