O-o
Very unique.
Never actually heard a song like this before, to be honest, so I don't know what
to critique besides the way the instruments enter and exit the song.
Some of the instruments just started playing out of nowhere, and it's up to you
how your progression works, but introducing instruments in a slow manner gives
a smoother feeling.
If you want to introduce an instrument slowly, make its volume low or use cutoff (muffle) and build
it up from there. Same with endings, fade-outs, etc.
Also, I like the way your drum patterns change. :3