Accomplished work on your quick sketches of your scenes and environments, citrus0418. That's very extraordinary work I've seen from you this evening.
Well, if I was to give you a totally sincere critique, it could and really should be that though those thumbnails of those compositions of these backgrounds are alright, yet, I'm not getting enough of the abstract look and feeling of them. Would you please loosen up your hands and brains and eyes, with 1 hour of 28 second quicker sketches of scenes and environments in 9 days? (3600/28/9, 129/9=14 scribbly BGs a day) And while you're at it, please check out this link here. It's of a file of a book that has been out of print for almost a decade, called Frasier Maclean's Setting the Scene. It's about the art and evolution of animated cartoon layout art.
The reason why you could and would check out this link is because, not only you'd be able to constantly improve your thumbnailing and composing the landscapes and scenes, but also, to help you broaden and diversify your influences of practicing how to draw the locations and scenes.
Good luck to you, and I hope this've helped.
I find it hard to give useful critique, as I am not 100% sure, what your endgoal is. You certainly achieve a lot of readability with very few lines. The use of multiple tones gives a very painterish atmosphere to some.
Maybe the houses could go from 95% there to 97% there with a more accurate perspective, but with the spontaneous nature of those sketches it doesn't really bother much. I mean, drawing a few hundred boxes is always a good idea if you have the time for it, (drawabox.com) but I am not sure how urgent it would be for your list of priorities.