How to use the Chord Identification Trainer (Eguchi Method for Perfect Pitch)

This is a video explaining how to use the [url=pganssle.githu...]Chord Identification Method trainer[/url] that I built based on [url=pom.sagepub.com...]Sakakibara (2014)[/url]¹, which follows the Eguchi Chord Identification Method to teach children between the ages of 2-6 how to have perfect pitch. See the [url=ichionkai.co.j...]Ichionkai Music School[/url].
This is entirely based on what it says in the paper. Apparently there are 5 books in Japan explaining the method, but I don't have access to them. If you are familiar with the method and notice that I'm doing something wrong, please let me know.
¹ Sakakibara, A. (2014). A longitudinal study of the process of acquiring absolute pitch: A practical report of training with the ‘chord identification method.’ Psychology of Music, 42(1), 86-111. doi:10.1177/0305735612463948