==CODES==

-Harder Mode and Extended Mode.-
At the Title Screen.
+-------------------------------------------------------------------+----------------------------+
| Effect                                                            | Code                       |
+-------------------------------------------------------------------+----------------------------+
| Activates Extended Mode, adds a more difficult second loop after  | Down while pressing Start. |
| completing the game.                                              |                            |
| Activates Harder Mode, a game with higher difficulty.             | Up while pressing Start.   |
+-------------------------------------------------------------------+----------------------------+