Fun memory game, also really love the visual style you've gone for! Mirroring Loten's concern, I thought some of the colors (mainly along the green/blue/purple part of the spectrum) were a bit too similar which ended up causing me some trouble, but that should be an easy fix. Despite the color confusion, I still really liked the color transition effects! If you end up adding to this, you could add another layer of trying to remember the timing of each color in the sequence, in addition to the actual color for each one.