Hi there, could you elaborate on the specific palettes you had problems with? Some of the palettes are meant to be harder than others. We tried to also include a set of very easy palettes, such as the neon ones. If you are still having difficulties, turning the CRT filter off might also help for easier distinguishability of the different colors.
As for the purpose, like you said, the game doesn't really have one. It's meant to be a short and casual timewaster while doing something on the other monitor.