According to the project's director, BingTangHuLuer:
We have held 3 animation-painting live events, but which are inconvenient for friends in other cities. So I have the idea about play it through the internet, and this short film is the result. Involving more than 100 people, I'm more excited for having so many creative friends gathered than just the number.
Which would explain the necessity for 12 minutes of credits after a minute-long short.