Problem med While Loop og random.

Java kode 

 import java.util.Scanner;
  import java.util.Random;
  
  public class Elev
  {
      static Scanner input = new Scanner(System.in);
      static Random random = new Random();
      static boolean play = true;
      
      public static void main(String args[])
      {
          
          while(play)
          {
              runGame();
          }
          
      }
      
      public static void runGame()
      {
          int randomNumber = randomNumber(); 
          System.out.print("Guess numbers 1 - 10 : ");
          int userInput = input.nextInt();
          
          if(userInput==randomNumber)
          {
              System.out.println("\nYou are correct!\nI was thinking of " + randomNumber+"\n");
              playAgain();
          }
          else
          {
              System.out.println("Wrong! I was thinking of " + randomNumber);
              playAgain();
          }
      }
   
      public static int randomNumber()
      {
          int a = random.nextInt(10);
          return a;
      }
      
      public static void playAgain()
      {
          System.out.print("Play again? (Y/N): ");         
          input = new Scanner(System.in);
          String playAgainInput = input.nextLine();
          
          if(playAgainInput.equalsIgnoreCase("n"))
          {
              System.out.println("Thanks for playing!");
              play = false;
          }
          else if(playAgainInput.equalsIgnoreCase("y"))
          {
              play = true;
          }
      }
  }