Oh, to be crystal clear (I'm actually just about to include links to the assets instead of just the names, which I forgot to do). I did not create the artwork, I purchased the assets from ansimuz. You are spot on with difficulty, I'll definitely tone that back in other levels if I choose to make more.
Ah okay! Thank you for the transparency. Another thing I thought of that may help. Maybe add a visual que, or sound effect when you successfully press an arrow at the correct or incorrect time? It was difficult to know when I was doing well or bad sometimes. Still a good game, especially for the 2 week time frame :)