One UI Sudoku

How to play is very simple, the game will give a 9 x 9 matrix and based on a few pre-filled numbers, the player should fill in the remaining numbers in the unfilled cells so that they cannot match that number on each row, each column, and each 3 x 3 sub-matrix (2 x 2 with 4 x 4 matrix) with the same fill color. Players can save the games played or arrange the numbers themselves to form a game