2:02 - Nice guitar sound, shame it barely makes much of an appearance!
3:03 - Like what you've tried to do here, but the percussion feels a bit out of time. Try tightening up the shakers.
5:11 - Almost the Eagles. Nice
Overall, it's not bad, you're clearly a good musician with a solid knowledge of chords and song structures.
What does need work is your mixing: the drums are far too low in the mix, and the EQ is a bit off, those tend to be the things that make home productions sound as such. Try adding some compression on the master bus to even things up a bit and go from there.
Also, your section changes are somtimes quite abrupt, the one at 1:26 is especially odd as it's an extra bar tacked onto an 8 bar phrase.
I like the idea though, it's almost Mars Volta/Muse-esque in the epicness. It just needs some tightening up. Also, vocals would definitely be a plus on a 7+ minute song
