Very nice chiptune tracks! Loved the opening sequence you had, them delved all the chiptuney greatness. I can hear your influences via your melody and harmonies, very reminiscent of Gameboy track limits, really great work conveying that. Like others have mentioned, I think a bit more expression within the sf themselves would bring this to another level of production! Maybe even incorporating the orchestral elements you had in the opening track too.
Overall, great stuff, really nostalgic!