Quite good
In general, the game is fun and entertaining, staying interesting because of the advancing story introducing more and more new techniques and types of riddles. Also, I am quite happy that the game actually managed to include some of the humor characteristic for the Doctor Who TV show. However, there some things are annoying:
1. Blocks pushed/pulled close by other objects often get caught by these for no obvious reason.
2. The level creator feature is infested by some bugs: When entering a room in edit mode, its contents are often loaded incorrectly or not at all, making it difficult to almost impossible to create (especially multi-room-) levels.
Celpix about
Doctor Who: The Mazes of Time, v1.2.1