This project is a reference to several programming techniques. Some additional features that may be fun to play are only NotNiceToHave.

• Hints may expose the internal fill of one or more cells either on a requested cell or by random on many cells.
• Bottom and right Mask that present backward matches.
• User defined cell size.
• User defined density of internal fill.
• Designer mode for internal fill.
• Unique constraint in database by internal fill.
• Indication if found solution matches internal fill.
• Advanced Stopwatch that registers Home clicks or other.
• Pretty printing for colouring.
• A conclusion. There is no recommendation. All implementations work. JavaScript is the only prominent programming language available in browsers.
• There are many more programming languages and techniques applicable.
• ...