I'm partially only saying this because I have been acquainted with it only a semi-short time, but it does seem quite dark, I suppose, except the middle section is a very light/beautiful aftermath, and the finalé being a bit furious - the Popular Chaconne that Busoni so beautifully transcribed.
I have been foolishly learning it recently, opening chords are quite straight forward I suppose, but I already know I can't play the end, and probably several other parts XD One of those pieces I attempt for fun, heh.
Btw, I realise that's even if I wasn't a newbie Pianist, this is still probably an exceptionally difficult piece XD So it may be pointless suggesting it at all, hehe.
AH! I know, maybe something like the First Movement to Prokofiev's Eighth Piano Sonata? I believe it's that one, and maybe the third movement too, I think that's also a bit "Wah" ^_^;;