Interesting idea. Maybe there are upper limits on how many of those 200 dancing figures anyone can keep track off before they feel there is too much going on on screen - you will have to do some research - http://jov.arvojournals.org/article.aspx?articleid=2121950

You can retry where "players" just see a smaller group say 4,8 etc and see if the feedback is better.

The app would look similar to https://imgur.com/a/41oAc60 :)