The end title has two main sections- the first depicts the "cartoon-y" yet clockwork-like day-to-day existence of the two main characters, each represented by a solo woodwind. The second section is reminiscent of a young girl at play, with a very innocent character and a musical sound not unlike that of a music-box or a child's hanging mobile.

The score for Mr. Circle and Mr. Square was composed electronically and produced entirely in my home studio.