[draygin]

You need to make a .txt file of all the levels in the order they go
you have to put the levels in "" and seperate them by , if there isnt a level there you leave it blank with "" and no level name in it (look below for example

such as
"level1.graal","level2.graal",Level3.graal"
"","biglevel.graal","1level.graal"
"","anublevel.graal",""

that will make it a square then in level making mode hit M to generate a map but you'll need to have the commands in an npc on the level telling you to use the .txt file dont know the script off the top of my head but just look in the tutorial part and you'll see it.