Object: Fill-in the popular Sudoku numbers grid.

Click upon the visible 9x9 grid to initiate a new puzzle. Once done, the player (Self) needs to click any of the large left-side Indicator numbers to select an active number.
Clicking next onto a grid square(s) will continue to type-in that selected number(s).
A set of smaller indicator numbers are also available - for if/when a player isn't sure when filling in a square. A player may also utilize the empty spaces surrounding the main grid - using either of the two Indicator sets.
Each Sudoku puzzle's given squares (in pairs) are mirrored.
Note: a Hint button is available near the bottom left corner of the visible area.
Single square hints can be called upon at any player's (Self) turn.
Good luck.

Downside note:
Not every initiation process may generate a valid puzzle. I could only test this via a 15 year-old laptop running Windows 2000 (lol). I used a Thinking Time setting of 5 seconds per move, with Expert Strength and the Largest Variety, per Zillions v1.31. Each new puzzle under this environment took approximately four minutes to prepare. I expect that result should be easily improved upon with more advanced computing hardware.

A detailed coding explanation note leads the actual zrf file.