I think you missed their point. They want the tutorial to be streamlined and focused rather than bloated with dialogue that does not move the tutorial forward.
Above, you have another person with a similar complaint, namely that you're mixing your narrative into the tutorial.
At this point, you should be reflecting on what a tutorial is, and realize that it's better to keep humorous dialogue and character introductions in the story while making the tutorial as concise and short as possible.