I think this is the only indisputably perfect interpretation of mode I've seen. And it comes with dark mode! Another mode! I eventually figured out the way to play, but I checked out before my brain melted. I'm not going to rank a game lower because I'm not a big sudoku fan though, because the quality is obvious. I think there should have been more easy puzzles before jumping into the deep end of square grids. Other than that, the game is good, I liked it and left before I had a chance to not like it. Great job!
And if you get the time I'd appreciate if you gave my game a fair shake too!