You made a sudoku game. What you did was rather amazing being able to program a game that can create a sudoku puzzle that will work out to only a few solutions (meaning last few numbers could be interchangeable)
Unfortunately casual players wont care at face value this is a sudoku game end.
I would like to encourage you to improve the art make this pony shine a little bit. A little music will polish this a little bit more.
Always strive for better.