public static void onLevelCOmplete(int number, boolean isComplete) {
   if (isComplete) {
     JOptionPane.showMessageDialog(null, "Mission Complete!");
   } else {
     JOptionPane.showMessageDialog(null, "Mission Failed");
   }
   if (number == 1) {
     Level.setLevel1(null);
   } else if (number == 2) {
     Level.setLevel2(null);
   } else if (number == 3) {
     Level.setLevel3(null);
   } else if (number == 4) {
     Level.setLevel4(null);
   } else if (true) {
     ThrowCrash("The level was not unloaded correctly");
   }
 }