Some people like day-night effect, some not. I don't like it, cuz I can barely see reds in normal light; cant see a zeppelin at night.
So, for those who want to keep things simple, uninstall the game, reinstall it and, when the games begin the optimization, close it just when it writes the second or third line of text on the bottom-left corner of the screen. It works for me.
And for some of you experiencing low frame-rate, I noticed that the big vilain on this matter is the "detailed water". Even a good device like my Nexus 7 2013 (despite its age) have issues rendering detailed water. Just turn it off on the graphic options.