Nice little blast from the past - thanks for sharing.
Welcome. As I find more stuff worth reading, I'll post it.
As for the sound quality in Nectaris ~ Military Madness, you can experience somewhat better sound & music in the
Windows 95 port of Nectaris released in Japan which is freeware ^__^ get it here! You'll need WinRAR. You might have to try a few times before it properly installs (no english). Once you do though, you'll be treated to Nectaris as it was on the PCE but with better audio as I said, and,
mouse support which makes playing it a joy. While the audio is nothing to get excited about, if for some reason you are a raving Nectaris fan who needs to hear better sound than what you hear in Nectaris/Military Madness on PCE, TG16, Turbo Duo Neo Nectaris ( the original was included in NN) and Wii VC, then download the PC version.
Or, have even more fun by hunting down the incredibly rare Sharp X68000 version-- It might be easier to find the ROM and an emulator for that, though. I used to have the ROM but lost it when my old HDD died a sad death.
So with the Win95 PC Nectaris you now have "16-bit quality sound" or something like that, not a technical definition. I guess it sounds more like what you would hear on a 16-bit console or computer with FM Synth.