In the Variant choice, before each game, you can keep Standard or pick one of two twists.
Mirror: backwards
Watch the sequence as usual, then repeat it from the last color to the first. The screen says Backwards! when it is your turn. You must hold the whole sequence and reverse it: it is a real working memory test. Mirror multiplies your score by 1.5.
Shuffle: the buttons move
The buttons change places every round. You cannot rely on positions any more: you must remember the colors themselves. Shuffle multiplies your score by 1.25.
In the daily challenge
The daily challenge uses the three variants in turn, so every three days you meet each of them.