This is really calming. Is the music generated fresh for each city, or do cities share a set of loops? I'd love a rainy Seoul alley at 2am as a preset.
Fun idea, I spent longer here than I planned. How did you decide which numbers get their own room? I'd vote for 60: it's the length of the old East Asian calendar cycle (10 stems × 12 branches), which Korea still uses for things like zodiac years.