I like the lead guitar tune. I think it could benefit from a bit more reverb, but even now it sounds pretty good. Maybe try tweaking the midrange/high end on the EQ a bit as well and see how that sounds. I think making the lead guitar a bit brighter might make it sound better, but give it a try and see what you think.
The vocal volume seems too low to me for the main vocals and the background screaming vocals. I think the effect on the background screaming vocals sounded good based on the metal sound you have going with this song. It could possibly use a bit more tweaking, but you're definitely going in the right direction in my opinion. The lead vocals seem to lack definition. After turning up the volume a bit you may need to play around in the EQ some more.
I wasn't a fan of the panning (the screaming vocals were in my left ear and the guitar at the end in my right ear). I would have preferred them in the center or at least less panned than they were.
I personally think the double bass is way too much (goes on for the whole song), but I'm assuming this is a loop track. I'm not saying don't use double bass (it's metal after all), I'm just saying it was hard on the ears since it went on so long. Obviously improving the composition of the drums could make this a completely different song.
The background guitar sounds quiet toward the beginning/middle of the song, but the levels sounded better during the latter half of the song. Could probably be turned up in both places though. It may just be that the drums are drowning it out.
I like the composition and I think you could easily move it around a bit or add a few more parts and get a longer song.