This is fabulous, thanks for posting… and it’s not just MIDI files either, lots of classic game music running under the appropriate sound emulation also.
I suspect the reason why nobody has commented so far isn’t because they didn’t like it, but rather, they entered and never came back… :-)
This is great! Had a similar idea on my implement-someday list - in terms of file size & bloat these tracks are about 1000x more bandwidth-efficient than streaming them on YouTube which is what I think most people do for retro chiptune music.
Marketing tip, I would downplay the MIDI side of it, maybe say chiptune or retro sound synthesis or something instead - this has accurate sound-chip emulators built in, wheras MIDI files / general MIDI are historically pretty cheesy and inconsistent due to the variety of General MIDI playback devices and sound sets.
I suspect the reason why nobody has commented so far isn’t because they didn’t like it, but rather, they entered and never came back… :-)