Personally myself, I remember playing a similar game on mobile, and can say that playing puzzles like these really improved my color perception! It helps understanding how certain colors fade into others, and which color combos go well together!
It's really sweet to see a recreation of this genre here ^^ It's chill, rewarding with pretty palette ideas, and frustrating in a way that feels fair. I feel not everyone may think the same, since each person perceives colors a bit differently, and puzzles are a more particular genre, but I liked it! :D