Thank you for playing. Glad you had fun.
As far as the theme, blowing bubbles is considered a "quintessential summer activity" (just ask ChatGPT, lol). The thematic elements in the game are fireflies, daisies, and weeds (all are "summery" things), and the playing surface is presented as a sun-drenched summer field.
I'm not sure what you mean by "problems locating existing bubbles". They are those blue spheres that you create.
Cheers!