Spectacular. Details of the creature and city are splendid. The size of the creature, made clear by the nearby skyscrapers, increases the impact. Reminds me of an idea of had years ago about a colossal hound stalking the plains of America and incinerating the cities.
The worst part is, even if the city wins (I'm assuming the planes belong to them) the robot dinosaur thing is still going to fall on them. Also, how'd it get so close? This seems like a problem that should be delt with well before it reaches the "Standing on City Hall" stage.