Feb 7, 2024

[Enhancements]
・Significantly improved the speed of board generation.
・Added "?-mode", in which you can mark cells.
・When saving a game, the display position and mode are now also saved.
・Prevented "Hint" from being used more than once in the same situation.
・Modified the design and layout.
[Bug fixes]
・Fixed a bug in strict mode that occasionally caused a game over if a safe cell was mistakenly flagged and then opened after the game had progressed.
[Others]
・Removed the "Old" skin.