2019/08/20 Adaptation to androidx
2019/05/26 add delete button(for game)
2019/05/26 add link to "how to use"
2019/05/23 fix edit functions of score board
2019/05/16 add functions of "for Game"
2019/04/09 correspond to round icon
2019/04/06 change ad position, correct ad ID
2018/08/25 modify circle position
2018/08/20 add circle around selected item
2018/08/07 add view of selected item
2018/07/25 1st release (product ver)