Yeeeeeeah!
High-energy stuff is always G. I know this was mostly just put together, but I wouldn't mind so more variation with this. Don't get me wrong, I like what you have...it's just I can't see myself listening to it for longer than what it's at right now.
Then again, I've no idea if you have the intention of working on this more or not. I would personally like to see more out of this, because it definitely has some great potential.
And you already noted it, but yeah...mastering isn't too great. Though it shouldn't take more than 10 minutes to fix that and have this sounding all crisp and shiny. Either way, definitely lookin' forward to hearing more of your work, whenever you get some more uploaded. :D (4/5)