added NumberGuess Game

src/main/java/com/thealgorithms/puzzlesandgames/NumberGuess.java

@@ -0,0 +1,54 @@
+/**
+ * Simple Number Guessing Game.
+ * The player guesses a random number between 1 and 100.
+ * Reference: https://en.wikipedia.org/wiki/Guess_the_number
+ */
+
+package com.thealgorithms.puzzlesandgames;
+import java.util.Scanner;
+
+public final class NumberGuess {
+    private NumberGuess() {
+        throw new AssertionError("Cannot instantiate NumberGuess");
+    }
+
+    public static void playGame() {
+        Scanner sc = new Scanner(System.in);
+        int number = (int) (Math.random() * 100) + 1;
+        int guess = 0;
+        int tries = 0;
+
+        System.out.println("🎯 Welcome to the Number Guessing Game!");
+        System.out.println("I've picked a number between 1 and 100. Try to guess it!\n");
+
+        while (true) {
+            System.out.print("Enter your guess: ");
+
+            if (!sc.hasNextInt()) {
+                System.out.println("Please enter a valid number.");
+                sc.next();
+                continue;
+            }
+
+            guess = sc.nextInt();
+            tries++;
+
+            if (guess < 1 || guess > 100) {
+                System.out.println("⚠️ Please guess a number between 1 and 100.");
+                continue;
+            }
+
+            if (guess < number) {
+                System.out.println("Too low! 📉");
+            } else if (guess > number) {
+                System.out.println("Too high! 📈");
+            } else {
+                System.out.println("🎉 Correct! The number was " + number + ".");
+                System.out.println("You took " + tries + " tries.");
+                break;
+            }
+        }
+
+        sc.close();
+    }
+}