Yoyo+'s Sudoku game could be one of the best apps on the GP2X, if he just changed one tiny thing. For me, being able to write in as many notes as I want into the squares is important. Unfortunately, his game only lets you put in 4. I realize it'd be less graphically pleasent to let you cram in up to 9 marks into one square, but it'd really make the game more enjoyable for me.