Simply transforms the minetest world into 2d dimension. Almost everything are completely flat
players with the leave2d privilege can hold "special" to leave the 2d world or revert
Players can walk, jump, swim, hurt by heights, blocks, drop bones, /sethome /home etc like normal players...
Hold sneak to: sneak, fly/fast, noclip (requires the privileges like default)
if you grant or revoke fly or noclip privileges, the player have to die or respawn to take effect
You can use any mapgen