Once you're in a dark location you're forever stuck there.
If you add a Manipulator to the example game protagonist then you can produce this:
> look
[ The Beginning ]
( north )
> illuminate 0
Your environs fade to black due to Ineffable Spooky Magic.
> look
[ Blackness ]
You cannot see anything because it is very dark.
> north
It's too dark to see.
Once you're in a dark location you're forever stuck there.
If you add a Manipulator to the example game protagonist then you can produce this: