From StrategyWiki, the video game walkthrough and strategy guide wiki
The following are the controls used by the game.
Erasing save files
The player's save files can be deleted from the "Data Select" screen.
This includes screens similar to the title screen or the solution screen displayed after a puzzle is solved.
- or : Continue.
"How to Play" tutorial
- : Move cursor.
- : Chisel selected cell; undo chiseled cell.
- : Cross out selected cell; undo crossed out cell.
- : Pause the game.