Hold any key or hold down the mouse to fly up. Let go to fly down. Do not collide with the gray walls. (The walls get narrower, so you'll eventually have to spam click).
The only difference is that I changed the wave and Master Pollo is now Apprentice Pollo. Thanks to PhilipJohnnyBob for his original project, Master Pollo's Ship! The world record does not reset once clicked flag again.