Surprised I seem to be the only one willing to ask; _why in the world would you wall the implementation behind a Google Form?_
Edit: Implementation details are actually readily accessible in the DOM. Here's a gist that extracts the relevant details (for those who, understandably, don't want to give out their email in exchange):
It's baffling to me. It's one thing if you don't want to do a write up and share it but to offer that in exchange to collect email adresses seems so strange.
As it currently stands, code without an explicit license isn't usable. There is no license for the code you posted, but contacting him could get you one. Using the code linked could constitute a copyright violation.
Edit: Implementation details are actually readily accessible in the DOM. Here's a gist that extracts the relevant details (for those who, understandably, don't want to give out their email in exchange):
https://gist.github.com/brysonreece/b15f33cda30af06b7b70788d...