It works fine at first but seems to break after the day ends, if you back out to the menu: the stomach size persists but the growth meter resets, the streak persists, the auxiliary meters (toilet, smoothie, temp/water) disappear, and the day ends abruptly after some time (hidden aux meters draining?). After this happens, if you return to the menu and go back in to the game, the day will immediately end from then on.
(at least, this is what happens for me)
Aside from that, I do enjoy the concept and the art! She swells quite nicely :3