...and don't click too many times! As an experienced driver in the US for some 3 decades, I saw hazards coming out of the woodwork when I took the test. And like DrSuperL99, I saw the hazards too early and responded too quickly, causing the programme to think I was guessing. So much so that on one segment, it cut short and the screen told me that I would get no credit for that one because it assumed I was clicking randomly. Fortunately, there are several segments and all my other segments made up for that one. Phew!
It helps to watch the practice video during the exam (just before the Hazard Perception Test starts and you can choose to rewatch it, too), as it will tell you exactly what's expected of you. I.e, click as soon as you see the potential hazard, again as it progressively becomes more hazardous, and so on...but not too much!