Thanks for picking this up!
As far as I can tell, the only mistakes are grammatical errors and misused synonyms.
For example: Page 5 "'Balance Crystal' You can return to the ground by touching it." I would use "Surface" here instead of "Ground" as it makes more sense, and on page 6 I would use "They're so carefree!" instead of "What a carefree people!"
What you put works more referring to a third party, like describing a village of farmers as "A carefree people" when talking to someone else, but it's quite archaic.