There *was* a CGA version that was pretty much the 8-bit version with filled polygons, but I was in the middle of revamping the engine to actually use the same geometry as the 32-bit versions (with polygons, height differences, etc), but that project is on hold for now. This new version was EGA (in fact, the I was reworking the Amiga, Atari ST and Mega Drive versions to use the EGA palette, to simplify things).