Funny Sudoku

Sudoku is a free logic based number placement puzzle game.
It based on open source sudoku released it under the GPLv3 but will add more features.
#Sudoku Play: four input methods, undo/redo, pencil marks(auto), hints.
#Include five difficulty levels:Easy Sudoku, Medium Sudoku, Challenging Sudoku, Hard Sudoku, Fiendish Sudoku
#Include Sudoku-X, Hyper Sudoku, Percent Sudoku, Color Sudoku and Squiggly Sudoku. It comes with a total of 5000 puzzles.