Issue: Fallback-Option does not seem to work

Hi, I copied over the fallback example from the documentation to Inky:

```
You search desperately for a friendly face in the crowd.
* The woman in the hat[?] pushes you roughly aside. -> find_help
* The man with the briefcase[?] looks disgusted as you stumble past him. -> find_help
* [] But it is too late: you collapse onto the station platform. This is the end.
-> END
```

However, it does not display the last option once the two other ones are chosen. Instead, it shows this:

```
You search desperately for a friendly face in the crowd.
3:
-------------
The woman in the hat pushes you roughly aside.
You search desperately for a friendly face in the crowd.
2:
-------------
The man with the briefcase looks disgusted as you stumble past him.
You search desperately for a friendly face in the crowd.
1:
```

So the game does not end. Did I do anything wrong, or is it a bug?