Pretty good game, really liked the concept and mechanics with the floods and water levels a lot, Though in my opinion it seemed to take quite some figuring out to be able to truly appreciate it. I could see someone easily giving up or even thinking the game is bad because they actually didn't understand something in the game, whether they even really realize it or not. Actually, when I first played the game a few days ago, I immediately quit and skipped rating the submission entirely as I thought the game could not be played. After I tried it again I was able to play it, and I actually really enjoyed it!
I think to improve it, there could be some more indicators to hint to the player what's going on. For example, when a water pump cannot have people added to it, maybe a red text appears at all times that says "too far away from water" (while it's still true, since I guess that can change even for the same water pump depending on the water level).
To try and check on more reasons why I might have quit right away at first, I think one was that everything being extremely tiny (in my opinion when I first saw this) and not able to zoom in or really do much of anything, as well as the huge amount of space around the main area also was a factor that turned me away from the game as well, well at first. However the problem is when I play it now I kind of like this aspect and found it appealing, so I'm not really sure if it really indicates something should be changed or not. It's possible there's something about this game where it's only for a certain kind of person that gives it a chance, but I'm not sure. I also can't tell whether that's a bad thing or may be even a good thing, as it may really depend.
I think some additional things probably have to do with indications and user feedback. Especially since the style is zoomed so far away and there's so little in terms of audio cues, it's almost as if the game assumes a very specific type of person will play it. Either someone that already knows what this kind of game is, or someone who better figure it out, figure it out as fast as possible before anyone in the vicinity might notice they didn't actually know how to play it, and they better also pretend they knew the whole time as well. Usually this might be an indicator that something in the game's overall feel isn't quite clear enough which might limit the accessibility of the game to only certain kinds of players, but that might depend on some things.
It's possible that an additional idea to improve it is that there should be a way to destroy buildings or clean up ruins,. But it's also possible it was intentionally done the way it is here.
Other than that though I really liked the game a lot, it was pretty straightforward once I got the hang of what was going on and it's pretty fun - so nice job on it! I may even consider to play it again sometime.