The main addition to the game that I think would be just about absolutely vital, and I'm a little surprised I'm not seeing it much on the forums already, would be a little popup message that asks you if you are sure you want to end the day if you still have Nichelings with unspent actions. I've seen it multiple times with veteran let's-players as well as experienced firsthand losing whole days on accident: the button is huge and in the center of the top of the screen, right where my strategy gamer brain says the menu is, and the default on the keyboard is the spacebar and enter keys, buttons I automatically hit for various functions in other strategy games. Also I discovered by accident that it is possible to double tap and have a night take two days (Murphy why! T-T). So having a little box pop up saying "X number of Nichelings still have actions" would go a HUGE way toward making the best game experience possible.