i see sonata, i click
this is magnificent. the motivic interactions... harmonic blending... so good.
too long for my internet attention span. but I think it could work in a concert hall very well.
and impressive fast octaves! very needed when it is the main motif
one thing but that is personal opinion, the open octave accompaniment might sound a bit too hollow (like bar 67), does work better if the register is lower (like bar 17, 274 etc.)
bars 189b-191a why suddenly regular triplets instead of the dotted? I find it becoming "too baroque" for a few seconds, especially with the traditional harmonies there. Again, opinion only, and I have no professional qualifications lol