[PATCHED!!! THANKS HOLOGRYPH AND DYNAMIC PIXELS!]

Overview

PATCHED 20/03/2020!

Step 1

Find 3 boxes. (Or 4 if you’re a Bagger, 5 if you unlocked the fourth slot.)

Step 2

Place one of the boxes in an open area. (Where you want to go directly up.)

Step 3

Fill your inventory slots with the 2 (or 3, or 4) remaining boxes.

Step 4

Jump onto the box you placed earlier, and look down at it.

Step 5

Now the flying part. The logic behind the bug is that, in Secret Neighbor, if your inventory is full and you pick up an item, it replaces the item you are currently holding with the item you picked up, and drops the item you where holding, and if you are midair, it drops the item underneath you. This way, you can rather easily jump, replace, stand on, jump, replace, stand on, and you will go higher and higher. (The more practice, the better.) Watch the video for a demonstration on how to get to the roof easily.
[link]

A Message to devs

They fixed it by removing item collision while items are moving :O thanks for the patch!