It is a demodash , a demodash is a dash but with a crouched hitbox it makes Madeline 4 pixels tall and the distance between those dust bunnies is exactly 4 pixels that's why he just goes straight throught the wall,you can do this by binding a key in the setting or pressing and releasing down right after you press dash
@@Salted_Pizza It's easy. I am a relatively bad gamer, and I had to practice for a few hours, to get it down just right. Now it's muscle memory basically.