Such a fun time! There were multiple points where I squealed in delight when finding out the details of a new mechanic. Each new color is really, really tight in how it combines with the others, and I loved the satisfaction of pulling off a tight move. A lot of the same satisfaction/pride as, say, finishing a good Meat Boy level. Really tight. A little tough on the one hand, though. I would maybe consider having one other optional control scheme in addition to the default one---there were definitely multiple points where I felt I would have had a more comfortable or satisfying time with, say, the arrow keys for movement while the left hand controlled the colors (or movement with left hand and each arrow key mapped to a color?). Really amazing work!