I've thought about adding a practice mode that would let you select a checkpoint to restart at. I think that would help a lot since you wouldn't have to play the whole level to test specific skips. Maybe it could include other features like flight so that you could examine the course.
I was able to break my Tutorial record twice. The slide jump doesn't have a minimum timer so you can do some pretty creative stuff and there's also a "hop" mechanic that I didn't explain in the tutorial. It lets you maintain a lot of your momentum with a normal jump if you can time it right.