Hello everybody!
I’m glad to open this threat and share with you as much as I can.
Recently I had to do three concepts as a test for a company. I got rejected but at least I can share these concepts with you, hope you like it! Cheers!
clear and fresh. congratulations 
Wow! Very nice, love the first, the concept with the floating city:)
Nice. Great job.
I love the fist one too. Nice work. Good luck with you.