At the beginning of each level, first choose where you want to investigate next.
Each level consists of two rounds.
In the first round, you must examine the crime scene and find the items listed on the right. A magnifying glass will appear if you mark an incorrect item. Now you can click on the correct item inside the magnifying glass or click outside the magnifying glass to exit the magnifying glass mode.
In the second round, you must find the pair of cards with the murder weapon displayed on the bottom right. To do this, uncover two cards. If they possess the same motif, the cards will disappear and you will be awarded points.