This game is one-off stories in which you tap the screen solving mysteries to escape.
You change your viewpoint by tapping the image or an arrow icon in the screen.
Acquired item can be selected and you can check the detailed images of them with item button at the bottom of the screen.
By tapping the screen while selecting an item, you are considered that you used that item.
You can do the following settings change in the gear icon in the top right corner of the screen .
Language (Japanese / English)
Presence or absence of sound effect
Presence or absence of vibration
Game level (you will have a variety of tips if you set it to beginner)
Game content storage method (Auto Save / manual save)