Hire A Private Eye

You control the investigator with your mouse, moving him left and right along the sidewalk to line up shots. The challenge comes from the timing. The targets appear briefly in their windows, and you have to snap a clear picture before they move away. Some levels add complications, like pedestrians walking by and blocking your view, or targets that only appear for a split second. The pacing is quick, and the difficulty builds steadily as you progress. It feels like a test of your reflexes and observation more than anything else.