... putting following code there:
I suggest passing the name of the Passage as a String to the <<goto>> macro instead of passing a Markup based Link, because although it ends up producing the same result the parser has to work harder to extract the Passage name from the Link. eg.
<<timed 10s>>
<<goto "Start">>
<</timed>>
@Jannybanny123
Individuals reading you story will do so at different rates, this can be due to a number of reasons: from their age; to their need for glasses; to how distracted they are; etc..
So if you really need to implement such a feature please remember those that read slower than others, because it can be real annoying not being able to finish reading something.