Please do it, get the offer that I didn't, maybe you could even write a blog post about how easy it is and how wrong I am! ;)
The thing is I did a few interviews for Go positions last year and I have a lot of experience with Go so yeah, I’m confident in my skills. I’ve also been on the other side of the process many times and I know exactly what they look for. I’m not saying this test is easy, I’m saying I’m good at it and prepared for these kinds of take homes.
I don’t agree that it’s a bad technical test though, and reading your article I can say your approach was suboptimal. If you keep interviewing for startups you need to put yourself in their shoes.
To quote the test:
> This project tests your ability not only to code, but to deal with ambiguity and open-endedness