Add features such as 0.1 second guessing (a.k.a. blink mode), screen scrambler, black and white, pixelated, etc. that users can enable for themselves during a friendly game. This would make it more fun to play with friends who aren't as good but still have a balanced, new, and exciting experience. Currently the only way to do this is through downloading web extensions but it would be nice to have this built-in.