Fantastic. These hip hop style drums and synths go together amazingly in a way I've never quite heard before, and the track mastering is absolutely fantastic.
I love when there are multiple melodies playing over each other (I wish I knew the exact terminology for this). It gives me an excuse to listen to the song multiple times and not get bored of it. Altogether this sounds epic.
With that being said, there are some sections of the song that appear to lack melodies (1:47-1:53 and 2:11-2:37). Something that doesn't appeal to me very much. If they had some subtle bass melodies perhaps they would've attracted my attention just a bit more.
Lastly, this is more of nitpick than anything, the voice clip saying "Let's Rock!" doesn't seem to fit the song too well in my ears. Perhaps if it said something more related to it's own genre. Alternatively it could have been a voice clip of one of Newgrounds many famous characters like Pico or a Tankman it would've worked really well with it being the Newgrounds Anthem and all.
That's all, I excitingly await the drop of this album.
Thanks and God bless you in your future endeavors,