Umm...where's the research on the efficacy of the change on how skilled the kid becomes at programming? All I see is they self-assessed that it was easier with pictures, and they were engaged longer. Great. But DID THEY LEARN TO CODE BETTER?

The algebra comparison is telling; "a study was done that showed that 92.9% of kids using the app achieved mastery of basic algebra after 1.5 hours of play" - where's the similar comparison?

And, how do we measure 'mastery'? Because the mathematical lexicon requires numbers, not pictures, and coding non-trivial things are done with languages that are text, not pictures, the way we test that is also important.

Note that fundamentally I agree with their conclusion that, pursuant to being marketable, they HAVE to use pictures, because people's impressions matter. But in terms of actual benefit, I'd want to know more details.