Very nice! This seems like a better way to learn or refresh on the language that just wading through tutorials/textbooks. One thing that is missing is a way to

Very nice! This seems like a better way to learn or refresh on the language that just wading through tutorials/textbooks. One thing that is missing is a way to report problems in the exercises. Already in the Conditions section I found an exercise that says: "Implement a function canVote that returns true whenever the age is bigger than 18" But the test is for a function that returns true when age is greater than or equal to 18.