Update README.md

Author: Ritesh Shrestha

README.md

@@ -1,8 +1,11 @@
 Tic tac toe game with simple AI. 
 
 1.User vs. Computer
-    1.  Beginner (Random) 
-    2.  Expert (two-in-a-row + block oppenent)
+
+     i.  Beginner (Random) 
+    ii.  Expert (two-in-a-row + block oppenent)
+    
 2.User vs. User
-3. Tic-Tac-Toe on a 4 by 4 grid. (the winning is defined as 4-in-a-row.) (User vs AI)
-4. Quit
+
+3.Tic-Tac-Toe on 4 by 4 grid. ( winning is defined as 4 in a row) . (User vs AI)
+