Celeste

Chapter 6 adds a new game mechanic of short term flight that is activated by grabbing Golden Feathers. As with the rest of the game you can use Assist Mode to become invincible and have unlimited Dash but overall this is a fairly reasonable level to get through without using it. Here is a video walk through I found in case you get stuck.

I did find one spot where I couldn't find the right path to continue but overall the level is fairly straight forward.
My mistake was trying to go up when I needed to go right. Good Luck and have fun!