refactoring: Fixed ghost count stuck at 4

src/main/java/pacmanGame/GameManager.java

@@ -9,13 +9,14 @@ public class GameManager {
 	public int score = 0;
 	public boolean ghostIsEdible = false;
 	public boolean isPaused; 
+	public final int ghostCount = 10;
 	
 	public GameManager() {
 		setupGame();
 	}
 	
    public void setupGame(){
-	   ghosts = new Ghost[4];
+	   ghosts = new Ghost[ghostCount];
        for (int i = 0; i < ghosts.length; i++) {
            ghosts[i] = new Ghost(this, i);
        }