moved some classes for simplification

src/de/miaurizius/jgame2d/core/GamePanel.java

@@ -1,5 +1,10 @@
 package de.miaurizius.jgame2d.core;
 
+import de.miaurizius.jgame2d.core.enums.GameState;
+import de.miaurizius.jgame2d.core.handlers.AssetSetter;
+import de.miaurizius.jgame2d.core.handlers.CollisionHandler;
+import de.miaurizius.jgame2d.core.handlers.KeyHandler;
+import de.miaurizius.jgame2d.core.handlers.Sound;
 import de.miaurizius.jgame2d.entity.Player;
 import de.miaurizius.jgame2d.object.SuperObject;
 import de.miaurizius.jgame2d.tile.TileManager;
@@ -30,7 +35,7 @@ public class GamePanel extends JPanel implements Runnable {
     int FPS = 60;
 
     // SYSTEM
-    TileManager tileM = new TileManager(this);
+    public TileManager tileM = new TileManager(this);
     KeyHandler keyH = new KeyHandler(this);
     Sound se = new Sound();
     Sound music = new Sound();

src/de/miaurizius/jgame2d/core/UI.java

@@ -1,5 +1,7 @@
 package de.miaurizius.jgame2d.core;
 
+import de.miaurizius.jgame2d.core.enums.GameState;
+
 import java.awt.*;
 
 public class UI {
@@ -20,10 +22,10 @@ public class UI {
         graphics2d.setColor(Color.white);
 
         switch (panel.gameState) {
-            case PLAY:
+            case GameState.PLAY:
 
                 break;
-            case PAUSE:
+            case GameState.PAUSE:
                 drawPauseScreen();
                 break;
         }

src/de/miaurizius/jgame2d/core/enums/Direction.java

@@ -1,4 +1,4 @@
-package de.miaurizius.jgame2d.core;
+package de.miaurizius.jgame2d.core.enums;
 
 public enum Direction {
 

src/de/miaurizius/jgame2d/core/enums/GameState.java

@@ -1,4 +1,4 @@
-package de.miaurizius.jgame2d.core;
+package de.miaurizius.jgame2d.core.enums;
 
 public enum GameState {
 

src/de/miaurizius/jgame2d/core/handlers/AssetSetter.java

@@ -1,4 +1,6 @@
-package de.miaurizius.jgame2d.core;
+package de.miaurizius.jgame2d.core.handlers;
+
+import de.miaurizius.jgame2d.core.GamePanel;
 
 public class AssetSetter {
 

src/de/miaurizius/jgame2d/core/handlers/CollisionHandler.java

@@ -1,5 +1,6 @@
-package de.miaurizius.jgame2d.core;
+package de.miaurizius.jgame2d.core.handlers;
 
+import de.miaurizius.jgame2d.core.GamePanel;
 import de.miaurizius.jgame2d.entity.Entity;
 import de.miaurizius.jgame2d.object.SuperObject;
 

src/de/miaurizius/jgame2d/core/handlers/KeyHandler.java

@@ -1,4 +1,7 @@
-package de.miaurizius.jgame2d.core;
+package de.miaurizius.jgame2d.core.handlers;
+
+import de.miaurizius.jgame2d.core.GamePanel;
+import de.miaurizius.jgame2d.core.enums.GameState;
 
 import java.awt.event.KeyEvent;
 import java.awt.event.KeyListener;

src/de/miaurizius/jgame2d/core/handlers/Sound.java

@@ -1,4 +1,6 @@
-package de.miaurizius.jgame2d.core;
+package de.miaurizius.jgame2d.core.handlers;
+
+import de.miaurizius.jgame2d.core.Boot;
 
 import javax.sound.sampled.AudioInputStream;
 import javax.sound.sampled.AudioSystem;