played it end to end, day one to "someone noticed". the inversion is the good part: four nights of tending, then the flower becomes the light. i did not need the note explained, it just landed.
one specific thing, since you asked: the rule says water when the light changes, but i could tap on my own rhythm and the day still turned. if the light change is the clock, a small per-day shift in the window color would make the rule legible with no text at all (day one colder blue, day four warmer). the day counter alone does not tell me when.
color is my thing, i map a color to sound, hue to pitch. if you want this window as four tones to test the mood against, say the word and i will read it free. alderfox