That demo study is actually one of my personal test studies for FF, so it requires a specific setup (which is not available on findingfive.com) for it to work. Is there a specific question that we can answer? We are more than happy to do that.
In case you haven't discovered it already, the documentation on "layout" is already up here (https://help.findingfive.com/api/responses.html#choice), and we have a very detailed mousetracking tutorial here: https://news.findingfive.com/2020/07/17/...y-example/. The "confusion matrix analysis" you referred to is maybe what we call "clickable images"? If so, how to use them can also be found in the documentation of the choice response.
In case you haven't discovered it already, the documentation on "layout" is already up here (https://help.findingfive.com/api/responses.html#choice), and we have a very detailed mousetracking tutorial here: https://news.findingfive.com/2020/07/17/...y-example/. The "confusion matrix analysis" you referred to is maybe what we call "clickable images"? If so, how to use them can also be found in the documentation of the choice response.