oh ok, well you press create world and press "create New World" and go "More World Options" and make it superflat, customize and delete 2 layers but on the last one before you delete it you go to "presents" and go through the source code at th top, it should look something like this: 3;minecraft:grass;1;village , change it so it now says 3;minecraft:air;1;village. And there you have it! Create the world and to uickly fall into the void so quickly double tap space bar to hover before you fall into the void. That how you do it!