That initial lead-in is pretty lengthy without any changes. I kept expecting some percussion to kick in right around the next bend, so I ended up being kind of disappointed on that front. That was the point when I explored the song page a bit more and noticed the solo bassist tag.
I'm certainly less disappointed now, and the solo bass vibe is nice and grungy, but without at least some kind of percussion (I mean, anyone with rhythm can finagle some sort of drum-like sound) or guitar lead, it feels incomplete. Currently preparing to be lynched by bassists from around the world, but hey--that's my honest take. Just doing my job.
There's just one other problem here in the mix, and that's the constant hiss in the background. Probably a mic or technical issue, maybe due to having the input raised so high, but it's definitely a shame that that's in there. I won't ding you too much for that, but I hope you can get it cleaned up for future recordings.
That said, I believe that Newgrounds really needs more talented bassists. Submit some more tracks, and try to incorporate some new elements into your work...even if it's something as basic as a layer where you're playing a shaker or cajon drum. While this track is great from a bass perspective, it could have really benefited from at least some hi-hat action to drive the tempo. There are always drummers and guitarists looking for a good bassist to round out the mix.
Score: 5.7/10