Glad you got some enjoyment out of it and appreciate the feedback! I also maxed out at 4 lol
I like the color idea, it'd be interesting to think about how exactly to do it. Same color order each time? That'd help the memorization. Random colors? Would you then show the order of colors to do, or have them also numbered so the color is more just for personal memory? Really cool suggestion, might have to poke around with it (if I work on this more).