Really impressive! The tiny cars and people give a real sense of scale, and the reflection in the water is a nice touch. Very pretty game. The visual effect of upgrading a building is super satisfying.
I think some of the numbers need to be tweaked. At the moment upgrading the stats of buildings of a certain level is only worth doing a couple of times because the % increase is going down, but the cost is going up, massive diminishing returns. Also the level 7+ buildings take an age to actually produce anything, even with the production speed city member.