New user, how do I go from one level file to another?

Hi, I've been working through the SDK tutorials (still stuck on whack-a-mole) and I was trying to figure out how I transition from one level file to another. I didn't see anything in the SDK documentation about level transition. Can someone point me in the right direction or give some explanation? I am confused because I am accustomed to Flash game Designing where it is very easy to transition from scene to scene (scene = level).