fixed bug that you can't leave pause mode

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

@@ -69,6 +69,9 @@ public class KeyHandler implements KeyListener {
                     }
                 }
                 break;
+            case PAUSE:
+                if(code == KeyEvent.VK_ESCAPE) panel.gameState = GameState.PLAY;
+                break;
         }
     }