More development time was needed due to a number of bugs (the ones I encountered were with River's AI). This is apparantly the first of a planned series, so I hope that for the next game, they replace the too side scroll-ish and linnear feel of this game with something more open world. To give you an idea of what moving throuhg thi sgame is like, it's pretty much the same as Microid's Syberia & Still Life games.
On the up side, when the audio track isn't out of synch, there's some good vocal work from Smith & Kingston, especially Smith, who slips right back into character from the start. And if you know your Who, then you shouldn't have too much of a problem pick up on the reference to the past (classic Who included).
The length of the game is about 6-7 hours, so you could probably get through this it in a weekend.