The highly pitched motif was supposed to portray rats and mice in the sewers.
The chord stabs makes the track a bit more jazzy, ive always done manual echoes in my chiptune work however. In fact ive never used a single non manual effect. :)

Its been a long time ago since i made this now though, hopefully ill be able to do stuff like this again in the future, had a rough time inbetween.. and though my knowledge of music has even evolved as i play alot of guitar these days im not always confident enough i can reproduce this, then again i never thought i could produce this when i did either, always felt musical ideas just flew me by and i was intelligent enough to recognice and capture it. :) Thanks for your review. -cal.