How to add new level?

Hii I am new to Unity and game developing.
I made a ball rolling game & made 1 level.
Now how to add new level & set it like
if ball goes to last point , level 2 starts ?
& Also how to add Start , Option , High score & exit options in game?
Right now i have to close game with Alt + F4 :stuck_out_tongue:

To make a new level, create a new scene in your project. To load that scene, use Application.LoadLevel("levelName")