Not too bad. I like the lighting from the "sun" (if that's what it's supposed to be). Maybe it can be a touch brighter and warmer colour-wise.
Don't know if this is part of your plan but it would look great with artificial lights too (street lights, lights from the buildings, etc)
One thing I would definitely try is to make more of a city centre. Your buildings are too evenly spaced out and sized. Maybe making a grouping of tall buildings around the "sun" and then smaller, more dilapidated buildings lit by artificial light around the city centre.