It's really great to look at, fun idea and nice music/sound effects! I don't know if it was a joke but Sudoku is a puzzle, maybe you where thinking of : Seppuku (If it was a joke, lol) but that isn't really a problem.. loved it!
It was a joke!! We are fans of japanese culture in general, so I'm glad you got it hahaha
Thank you so much for your feedback ^^