From what I know the different color arrows have different point values.
Here i am brain the size of a planet and they ask me to help you navigate. call that job satifaction because i don\'t. (quote from the hitchhikers guide to the galaxy)
Ex
4th note = red
8th note = blue
12th note = purple
16th note = yellow
You can ignore this, for it does not affect gameplay whatsoever. The point values are the same, and although it does make the arrows easier to see, that's not what it was intended for.
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