the one thing that stands out to me is the somewhat chromatic nature thanks to the slide notes and pitch bends craftily used throughout your soundtrack... i love it! you definitely know what you're working with, using the program (soundchip? DAW? i'm not sure what the right term would be) effectively to convey different atmospheres and scenarios in the entire collection. more traditional chiptune is out of my scope of knowledge, so i wouldn't be able to provide feedback on anything. :3c
i really enjoyed "Underground", as it has an evolving intensity throughout. i was initially ready to relax for a bit before it started picking up, which was a pleasant surprise! overall, magnificent work!