If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
You will be shown a 'before' and 'after' picture of a crime scene. All you have to do is to spot the clues of the 'after' picture. There are five clues on each pictures and five crime scenes in total. You only have 90 secs on each crime scene, so be quick. Every wrong guess will deduct 5 seconds from your remaining time. Lets play and find the differences!