It's a perfect game to kill time.
【Features】
・ Auto save
・ There is a hint
・ There is an answer
[How to play]
・ Solve the mystery by tapping or entering characters.
・? Mark can see hints and answers.
・ The puzzle mark will display the piece items that will be used later.
・ The gear mark displays the setting screen.
[BGM / SE]
・ Demon King Soul
・ Sound effect lab