Add boss portrait, reduce frequency of saves

src/GamePanel.java

@@ -42,7 +42,7 @@ public class GamePanel extends JPanel implements Runnable, KeyListener, Serializ
   public int playerFrame, enemyFrame;
   // keeps track of how many ticks has elapsed since last frame change
   public int playerFrameCounter = 0;
-  public int enemyFrameCounter = 0;
+  public int timeSinceLastSave = 0;
   public boolean isPaused, isDialogue, waitForDialogue, mouseAlreadyTranslated;
   public PauseMenu pauseMenu;
   public DialogueMenu dialogueMenu;
@@ -388,7 +388,10 @@ public class GamePanel extends JPanel implements Runnable, KeyListener, Serializ
             playerFrameCounter -= 5;
           }
         }
-        // a new save is made every tick
+        // a new save is made every 100 ticks
+        timeSinceLastSave++;
+        if (timeSinceLastSave >= 100) {
+          timeSinceLastSave -= 100;
           bombCount = LevelManager.bombs;
           try {
             // atomic save to prevent EOF errors
@@ -397,6 +400,7 @@ public class GamePanel extends JPanel implements Runnable, KeyListener, Serializ
           } catch (IOException | ConcurrentModificationException e) {
             e.printStackTrace();
           }
+        }
         repaint();
         delta--;
       }