Thanks a lot! actually the secret code *is* doing something but you have to play the game again - this way the game is more "replayable". I don't know if people *would* play the game multiple times, so any feedback is welcomed.
About the bug you might be right, never thought someone would *not* go through the gate right away so I did not bother creating additional save data for the gate. I apologize for the inconvenience.