1st of all, I think the idea of a group entering the jam like this is really cool, I look forward to listening to the other 'seasons'.
The piano composition is really strong, I really like the use of space and the way each piece meanders but never too far away. There's some really nice flourishes too.
I loved the boss theme, I think more boss themes should be on piano! It has a feeling I can't quite put my finger on, but it felt very Breath of the Wild.
I really, really liked this one. Fantastic work!