Text seems like a weird placement.
The bubble that goes around the city is odd lol. :P
Lastly that yellow pentooling? looks odd in that place.
Overall its about a 8.5/10.
Serious? I just like the text where he are, i work hard to get something and try some GFX like deviantz do. This "bubble" its like the Aura Protect of the city, altought is flying, so need a support! The yellow pentooling its a flame trying enter in the city but with the 'Aura' this will doesn't happen, air and space things.