Simple Sudoku Game

Simple Sudoku Game: This simple sudoku game is aimed for kids (but not only). You can play and have fun even if you can't read! With a deliberately limited number of game options, everyone can understand how to play and how to adapt this game to his needs. You can choose: # difficulty: easy, medium, hard # size: 2x2 (very easy, for kids), 3x2 (easy), 3x3 (standard) # tiles theme: digits (standard), pictures (for kids, several themes available) Some help can be provided with two buttons: # "tip": will select next fillable cell on first tap, will fill this cell whith right value on second tap # "conflicts": will show conflicting cells Every grid has one unique solution. No assumption or guessing is needed to solve grids.