According to the page, from green to red does not subtract any point but running twice the tests with errors subtract 5 points? Kind of arbitrary rules that have nothing to do with TDD if you ask me.
If we assume that this would legitimately motivate a developer to change their behavior, it seems like it would just incentivize them to run tests less frequently.
While I disagree with the tone of this comment, I have to admit my first thought was "TDD has jumped the shark". The last thing I want is some random critter getting happier or angrier based on the results of my testing. I don't want "Agile Clippy", thanks.