Love this!! Beautiful use of the colour palette as the sunrise/sunset, and the puzzle is elegantly designed with plenty of fun realisations.
I especially like how (ROT13 spoiler) abar bs gur obkrf raq hc va gur gnetrgf gurl ner pybfrfg gb ng gur fgneg bs gur tnzr. Ybiryl ovg bs zvfqverpgvba!