Even though I'm not a fan of the Facebook Like games, something I really hopend when I played YOUR first game was to see how all I did had some meaning to the world, now its like a childs dream come true! haha no, but really I admire the effort on making the world changing through the game. Props for that and I hope this game goes well for you on the money side too. You are gods (pun intended) and kind of the pioneers in this kind of game so, Good luck with this new game!
At first, I was expecting this to be as any other flying/diving game. But here you much more than that. Awesome game. I can see all the effort you put here. As a little feedback, try to use a cleaner typo and a little less saturated colors.
I find this as something that WOULD be great. I like the idea but needs more stuff to do than just burn the city with fireballs. Maybe playing with the physics to make the structures fall like a domino, or new kind of fire balls. Also it would be nice to move the Godzilla/dragon/giant lizard around.