Good start and end shots , the overall photography is well executed too: good job guys!
If I may though - and this only to give a personal view, not to say I would have done it better! - , I felt the garage section could easily be improved by cutting out some - unnecessary coverage (I'm thinking, for example, the staircase shot at 00:35-00:36 or at about 1:00 the back and forth on the mid-shot on the woman and the left-side wide shot) that were diluting the "Tension building": a slightly more effective strategy might have been a close up on the woman's face (reminiscent of the one @00:25, but front this time) and one wide shot from a single angle (otherwise the viewer is put alternatively in a subjective POV (as in the shot with the edge of the car at 00:50 or the one at 1:23) and in a more objective/external position (as @00:59 or 1:29), which can be confusing at this point of the story).
I feel the pace of the whole "garage dream/nightmare" sequence (before the knock on the window at 2:30) is slightly off, partly due to to the mis-alignment between the character inner clock and the camera's: what I mean is that the editing is moving too slow with respect to the real action time, hence a feeling of excessively long pauses (e.g when she "pauses" at 00:56, 1:26, 2:10). If intentional, and in line with the nightmarish thing, it might benefit from some more radical cuts like the one with the mask @2:02 (effective I think, you could have exploited this effect without prejudice I think), that would contribute more to the tension than a - weaker - pivot+push-in @1:35 (that did not work so well IMO).
I wondered also if some color-correction could have help differentiate the two parts/spaces too (e.g. a slightly colder tone between 00:24 and 2:30 and a warmer, falsely reassuring, before and after).
This is all quite subjective stuff of course, and your film was good anyway!
Best of luck for your following projects with the Cambridge club!