Hehehe, very minimalist.
I've noticed one change so far, and that's in the pedalling at about 1:20ish.
I'll admit to not being able to hear or feel the 'message', as it were. Care to enlighten a confused boy?
Oooh, chord sequence change at ~3:00 I like the new second chord.
And we're back to normal at ~3:38.
Can I ask where the idea for this came from? (btw, Experimental/Atonal/etc might have been a better forum for this one.)