Method of operation - There is an auto save function. · Let's examine the place to be worried about on the screen in the tap - move or the arrow at the bottom of the screen, do the swipe. · Acquired item can be selected in the tap. • When the tap the item again, you can be expanded. When you tap a specific location on the screen in a state in which, the item is selected, you can use the item. - You can display a hint by looking at the video ads. - volume adjustment function there is.