I must say, although I like the detail, and work you've done, these screenshots have many flaws which I hope you address. The first of these being the overuse of foliage. there are simply too many plants to the point of the game looking fairly ugly. It's something that can't be good for framerate, and creates a sloppy look. putting plants everywhere does not make for a nicer looking map.
I also dislike the contrast of lighting. In broad daylight, there are areas barely shaded from the sun that are completely pitch black. turning up the ambiance will make this look unquestionably more realistic, but as it is, It just hurts my eyes. At night, It's not much better as the entire level is too dark, and then random bits like the rooftops glow brightly. This could be fixed.
I must say I enjoy how you can actually combine objects together. this makes for an enhanced level of detail not often seen, since no one else seems to be able to do this. I appreciate it. The lighting, and the general "unpolished" appearance of the levels as if they were haphazardly crammed together must be fixed before I can deem this game "nice looking"