Want some help with the mixing/structure of this song

[Viscra Maelstrom 3,718]

i figure i have no choice but to get help from people with this song i've made.

 

so anyway, i made this song a few days ago. i like it and feel it has a good thing going for it. but i can tell that the mixing and mastering of the song is really sloppy, and i have very little experience working with mostly sample-based tracks, as opposed to writing in pure MIDI. i've done a few in the past, like this one, but this one is a lot more involved and i want to know how and what to do with it.

 

anyhow, here's the track in question. go nuts.