For someone raised on 'Fighting Fantasy', 'tunnels and trolls' and 'lone wolf', I was expecting this to take a few days to work through. In the end, I read it three times in an hour. The adventure involves you playing a youngster who gets taken on board the tardis for an adventure involving an alien zoo and some experimental time travel. The plot is brief and many of the choices are random since there are no clues which is the right option e.g. you're watching a dial and then have to choose whether the number on it is above or below 200, or deciding whether someone sounds upset or frightened. There are no actual wrong choices, just different ones. I did find that different choices revealed different parts of the story and even different characters, so it's worth doing it a few times to get the whole story, and the story is so short it's easy to do. Undemanding and a good idea to develop into something longer and more challenging.