docs: update README.md to add feature description and sample example

Author: architxkumar

README.md

@@ -2,16 +2,16 @@
 
 Number Guessing is a CLI game where the computer randomly selects a number 
 and the user has to guess it. The user is given a limited number of chances to guess the number. 
-If the user guesses the number correctly, the game ens, and the user wins. Otherwise,
+If the user guesses the number correctly, the game ends, and the user wins. Otherwise,
 the game continues until the user runs out of chances.
-</br>
-</br>
+
 This is a learning project built in Go as part of [roadmap.sh](https://roadmap.sh/projects/number-guessing-game) challenge.
 
 ## Features
 
-- Multiple Difficulty levels (easy, medium, hard)
-- Input Validation
+- Multiple difficulty levels (easy, medium, hard)
+- Input validation
+- Multiple rounds support
 
 ## Requirements
 
@@ -31,7 +31,7 @@ go build
 ```bash
 ./Number-Guessing
 ```
-### Sample Output
+### Sample Output 1 - Single Round
 ```text
 Welcome to Number Guessing Game!
 I'm thinking of a number between 1 and 100.
@@ -63,6 +63,61 @@ Incorrect! The number is less than 85
 Enter your guess: 87
 Game Over! You have used all the attempts
 ```
+### Sample Output 2 - Multiple Rounds
+```text
+Welcome to Number Guessing Game!
+I'm thinking of a number between 1 and 100.
+You have limited number of chances to guess the correct number depending upon the difficulty level.
+
+Please select the difficulty level.
+1. Easy (10)
+2. Medium (5)
+3. Hard (3)
+
+Enter your choice: 2
+
+Great! You have selected the Medium level.
+Let's start the game!
+
+
+Enter your guess: 60
+Incorrect! The number is greater than 60
+
+Enter your guess: 71
+Incorrect! The number is less than 71
+
+Enter your guess: 69
+Incorrect! The number is less than 69
+
+Enter your guess: 67
+Incorrect! The number is less than 67
+
+Enter your guess: 64
+Congratulations! You guessed the correct number in 5 attempts
+
+Would you like to play again? (Y/n): Y
+Please select the difficulty level.
+1. Easy (10)
+2. Medium (5)
+3. Hard (3)
+
+Enter your choice: 3
+
+Great! You have selected the Hard level.
+Let's start the game!
+
+
+Enter your guess: 75
+Incorrect! The number is less than 75
+
+Enter your guess: 38
+Incorrect! The number is greater than 38
+
+Enter your guess: 49
+Game Over! You have used all the attempts
+
+Would you like to play again? (Y/n): n
+```
 
 ## License