Update 'README.MD'

README.MD

 3. DO NOT CHANGE THE TEST OR THE ITEM CLASS
 
 # Levels
-This lab is divided into two levels. If you are 90% done with your labs or if you want to challenge yourself, get level2 with `git checkout level2` after you clone the repository. Otherwise, work on the master branch.
+This lab is divided into two levels. Level two has more code and is more difficult. If you are 90% done with your labs or if you want to challenge yourself, get level2 with `git checkout level2` after you clone the repository. Otherwise, work on the master branch.
 
 # Part 1 - Original Description of the Gilded Rose