Got to 80 stars yesterday, just 40 more to go. That one Daredevil challenge, the Bouldergeist one, took me only one try. It was easier than I expected because a lot of people found that to be one of the harder stars to get. When I beat that boss on a normal run I didn't get hit either. I did the three trial levels as well, those were quite challenging but I managed to finish them all.