The following update has been released.

Bug Fixes:

[]Fixed an issue where “No Hints” could still be counted as achieved even after using a hint []Fixed an issue where a row or column that had already been confirmed could be selected again when using a hint []Fixed an issue where voice audio would not play when subtitles were turned off []Fixed an issue where subtitles with two or more lines could overlap the 15x15 puzzle board (The subtitle text has been revised so that it always fits on one line.)

Feature Improvements and Adjustments:

[]Changed subtitles so that they disappear after a set amount of time once the voice audio has finished playing []Added an explanation of the hint feature to the confirmation message shown when using a hint
• Added a dedicated sound effect when using a hint

We apologize for the inconvenience.
We will continue making fixes and improvements to make the game more enjoyable to play.