while I was trying to get the official longest platformer multiplayer WR I found a flying glitch which is all based on extreme precision If you don't have enough precision it wont work. since the two players are made out of the exact same thing that the levels are made out of sometimes they stick to each other knowing this if we jump with the top one then jump with the bottom one, then wait a bit and hold the jump key for the bottom one. Now the characters can move around in the air while keeping the bottom one's jump key so the bottom one is sticking to the top one.

I'm pretty sure this glitch is almost useless

this is the proof that it works