The really repetitive song from fifth stage of the 8-bit Sonic 2, whose level aesthetic bears several similarities to Scrap Brain Zone from the first Sonic game. As such, it works well with mechanical/factory areas or something.
The port was originally completed on November 5th, 2015 as part of SMWCentral Idol 7 Round 2, where it took first place. The challenge, for those curious, was to port or compose a song that didn't use any SMW samples, as well as requisite use of at least three NES samples. The only audible differences between this version and the Idol submission are mixing, and a quicker volume fade for the intro square waves.
The arrangement, a MIDI by King Meteor, differs from the original as it adds chords and a few extra flourishes at the end.