Awesome game! One of a kind! But beware... if the game comes to GOG, both floppy and CD versions should be included. Why? Because the floppy version is better!
The CD version adds two major changes : voice acting and pre-rendered 3D cutscenes. The voice acting is subpar and becomes quite annoying in the second half of the game, where the gameplay is more about managment than story (you'll here the same lines over and over again).
The pre-rendered 3D cutscenes make the game dull. The 2D graphics were beautiful at the time and still are, the pre-rendered 3D was primitive and look dated today. The cutscene you'll see the most of is the ornithopter travel. In the floppy version the cutscene uses the game engine. As you travel, you'll see the desert take on various colors according to the day/night cycle. You'll see your destination on the horizon before reaching it or maybe spot a place that wasn't on your map. On the CD version, every time you take an orni, you'll see the same boring pre-rendered 3D cutscene. No shifting colors, nothing on the horizon, no surprises.
Keep in mind that this is true of a lot of games that were originally released on floppy discs and saw a "hasty" re-release on CD with a bit of 3D thrown in because it was "the new trend".