was8bit 2020-12-17 06:00 (Edited)
Arrange the characters in each block such that each column or row has unique characters (none repeating)
Arrows move cursor
Arrows+(A) flips 2 characters
(B) rotates all 4 characters in the block once clockwise
HINT: just before the characters are scrambled, you are shown the winning layout... try to memorize the center block and restore it when the game starts... :)
(The screen capture below shows a winning layout)
... this game based on THINKFUN (R)2016 game "Color Cube Sudoku"