No one should judge a series by its simple fan games. Starflight TLC is impressive for a fan title but its no match for the actual original Starflight games.
That being said the gog versions are the PC versions which were not the best looking or sounding. The Amiga versions are far better but obviously that requires emulation, roms and lots of configuring.
The Sega genesis/Mega Drive remake of Starflight 1 is the best version of them all. Great graphics, music and adventure. But once again you'd need a emulator and rom etc..
If you google "Blake's Sanctum Starflight" go go to the webring address that comes up I've made a tribute page to the entire series and all the fan games too with pictures, videos and downloads etc. I mostly use the Genesis and Amiga pictures in my tributes so you can see how much better they are compared to the PC versions here.