I think it might have something to do with its dynamics - it kind of sounds like there's no changes in volume, and certainly not in instrumentation throughout. Not quite sure why it doesn't work for me though, honestly. :-/
I can see this I guess, it does stay at pretty much the same intensity throughout and it really could benefit from more dynamics
repetition is also a strange beast, sometimes it bores me but then there are other songs that are repetitive that I love, I've never really been able to figure out what the difference is for most of them...