I am 14 years old and I've been playing piano for 10 years. The last piece I learned was Fantasie Impromptu, which I played at around 168 bpm. While this was a bit difficult for me, I think I'm capable of playing harder things. I love playing piano, but lately I've been a bit bored with it and I've been looking for a challenge. Would La Campanella be a good choice, or should I shoot for something easier? What might be some good songs for me to try?