I love that "falling" sounding riff in the beginning! one thing i would like to comment on is if this is intended to be an instrumental, it has to excel in the music aspect to entertain.
Don't get me wrong, the musical talent required to play those riffs and the drums in broken time signatures is amazing, trust me, but i think it is kind of repetitive in some parts, maybe incorporate some higher pitch parts? almost every part was low, but awesome too, but low.
all of the time changes flowed well, none of them were too outrageous.
when you get a full recording let me know, i love that riff in the beginning!!

if you can, could you crit mine?
Police were called to a daycare where a three-year-old was resisting a rest.