An Absolutely DELICIOUS way to tie the music into the themes. Having the time signature represent the hours of a summer evening is such a cool way to portray the night progressing! This idea is so strong in fact that I honestly think it carries the story theme by itself it's that good of an idea.
The music itself was also really great. It didn't feel like it was made out of an obligation to fit the time signatures. It felt like it was meant to be like that the whole time which is perfect for this.
Fantastic.