I agree that the beginning was pretty catchy! But I felt the dynamics/flow of the pieces were a bit odd. I think the transition into the part at 31 was too soon, and if you spent a bit more time between those measures, the whole song would be very smooth.
I really like what you did with the percussion; despite the song's tempo and drive remaining pretty consistent, the variation in the beat really helped to keep the song interesting. I also loved the instrumentation; did I hear an organ in there, at around the 50 second mark?
Finally, the loop was very smooth; it would be difficult to tell it was repeating without seeing that playbar at the bottom. =P
-Review for a Review