Together with the scientist working in the Blocks Merge laboratory, you take part in experiments on the merging of various cubes. Before you on the screen you will see a room of a certain shape. In its various ends there will be cubes of a certain color. You will have to select the cubes in turn and use the control keys to move them in the direction you need. Your task is to make two cubes of the same color touch each other. Then they merge and disappear from the room.