There's a 0 star category but how do you beat the game with 0 stars?

JARP made a video of it at one point, but I think everything JARP had got deleted at one point so it is gone. From what I remember, you can easily get all the way to course 13 without any issues by using key 1 skip and then getting key 2. The main issue was then the 35 star door, and he probably used a handsfree bob-omb for that. you would have to take a bob-omb in course 13 and get it handsfree, then bring it to the 35 star door and use it to clip through.