You are presented with 3 photos, if all three are the exact same move on and press the next button. If Any image has a discrepancy, meaning something is different about it compared to the others, press the burn button and burn it. This process is then repeated until the ingame clock has reached 6:00.
You can't take too long however because you constantly have a meter that rises, if it fills completely you lose, but if you guess correctly when spotting the difference in the photos, your meter goes down.
If you're having a hard time seeing something in a photo, the magnifying glass allows you to zoom in and out.
