There will be a guide once the game is finished.
Also mentioning the passwords is fine. Perhaps you have misread a 5 as 8. Yes, the pixel font is kinda wacky lol
I swear, no one told me about the bug until I was bored and tried to implement the gallery 馃槶
You are not missing it. That route and game over are both locked for now. It's a part of the new game plus (which is unavailable, yet)