Interesting instruments. It's a very bass-heavy track. I think you should be careful about Equalizing it so that the tones are truly as clear as possible. It's very repetitive and minimalistic. The bass distorts the drums a bit at around 1:20. You have SOME melodic things going on around 1:20 - 1:45, but they're not really as up-front in the mix as one would expect. I think you need a lot more dynamic contrast, melodic development, structural relief, and overall more variation in this track. The ending was also a little lack-luster. The thing that really bothers me about this piece, though, is that there are long sections, such as 2:30 - 4:00, where you barely change anything. You can't just have the same 4 or even 8-bar riff playing for almost 2 minutes. That's boring! Spice it up a little by introducing new instruments and harmonies, crescendos and transitions, sweeps and crashes. This kind of reminds me of another piece I came across a while ago: http://www.newgrounds.com/audio/listen/497399. Notice how, in that piece, the same riff is playing for almost the whole song...BUT there's much more variety and structuring around that riff than in your piece. If you want to build a piece this way, you still need more variety, my friend. The instruments and mood were cool, but this piece really shouldn't be 4.5 minutes long. Maybe 2.5. I think it has potential, but you really need a more interesting progression and added variety. Keep at it, man! ;)