> Also did you notice that the numbers in your quote don’t even agree? In parentheses the numbers are out of 41, not 336.

I agree that it's at least sloppy.

> The final results were from a survey, not a study where they trialed Super Mario games on students and followed their progress.

afaik a study can consist of one single survey

> This is not a serious paper.

Maybe, maybe not, my only point was about the sample size which was surprising if you read only the top part.