Regarding the Prologue:
I think there should be more choices in it.
While I personally don’t mind a long streak without choices, I think it is important to consider the Prologue as the first impression of the game. I assume it’s purpose is to entice the player to stick with the game and play it to the end, and a couple times after that (if the replay value is high enough).
Now, while it is alright for people like me who are in it for the story, they are likely to stay on since it has potential for a good intro, once it’s polished up.
For the people who are more interested in the interactive part though, I think the prologue gives off the wrong first impression of being a relatively straightforward story without much choices. More choices would probably help to keep those players on at least for the first chapter.
… Rereading the post, I feel like I should add a disclaimer that I am in no way affiliated with an Interactive Fiction Company and have no practical knowledge of the market aside from my personal impressions 