moving beetween levels

I know how to make new levels and how to switch between them in editor, but how can you switch between them in game?

It starts with “N” and ends with “extLevel”, what behavior is it?

I thought it was obvious. Just connect a line to it and it goes to the next level.

When your character touches (let’s say, a door), edit the door to where when the character touches it, it will load the next level. Then create the level the door loads, and play. As long as the behaviors are all like that, and the next level is complete, it should work.