Challenging for sure!
I enjoy experimental music, I think the only way to get somewhere is through breaking the rules and conventions and trying to bring something new to the mix of existing genres! This is not exactly the kind of music I'd listen to on a daily basis, however I'll try my best to review fairly, a promise's a promise right? :)
Also, take this review with a bit of a grain of salt, as in, take it for what it is: another's musicians thoughts on this song. Don't take anything I'm about to write as something to follow or to apply without hesitation; I'm just stating my opinion, nothing more, nothing less :P
Even though it sounds chaotic at first, it's actually pretty well organized, drums seem to follow some logic, which is nice to hear. I liked the guitar taking over the bass and drums, it gave an interesting twist, enjoyed that!
I felt the song was a bit repetitive, I'd liked to have seen more harmonies come in at some point, maybe some very light piano playing low notes could have fit, although that's up to you to decide, it's your song after all!
Mixing-wise, it was fair. I agree with both reviewers below, the drums need a higher presence, the atmosphere you have present is nice but seems very bass-oriented, some more prominent drums and cymbals would help bring the mix up a notch. It also perhaps lacks a bit of spice in the higher-ends of the spectrum, but that may be just me :0
In any case, overall composition was good, needs improvement for sure, but it's already got quite a lot of value and definitely has potential. I like to throw in inexpected elements into my songs when I can, it sets it apart from others and really makes it shine if used right, which I think you accomplished quite well ;)