Vingers as numbers instead of colors
My index finger is finger 1, my middle finger is finger 2, etc. I can't get the colours in my head. When I see a pink bar with a 3 in it, I'm playing a note with my ring finger. And when I suddenly see a blue 5 appear, then it all breaks down since I don't have a 5th finger.
I'm now stuck on the "four fingers" part in Level 3 because this notation does not work for me.