to do cannon skip, you must know these steps. The cannon shoots you up. if u leave the cannons walls while in the cannon state, you can effectively skip level 1!! So. in review.

1. Goto cannon
2. Touch the black part of cannon (triggers cannon state)
3. Immediately go the opposite direction (u leave the cannon walls)
4. Go towards level 2 checkpoint

Cannon Skip has been used in every run. not even just wr runs. just ALL runs. Its pretty good.