Yeh you'll get it. I was expecting to breeze through it too as I usually ace mini-games like this (my first try I lost by 1... then a half dozen attempts later...), but it is really well designed to trip you up.
The main way being that you shouldn't try to race Jules, or worry about when they make a mistake, as they will almost always score around 43-44. Just try to hit 44+ yourself and ignore Jules entirely.
If it kicks your arse for too long as it did me, you can turn off Music, Voice, and even drape something over the left hand side of the screen. When I did this, I got it second try.
