This is a 386 DOS game written in 1996.
The executable is available at http://tompaton.com/archive/19970131/spaced/spaced.zip and can be run using dosbox.
This source code is most C++ with some 386 assembler optimizations and hardware specific routines.
It was built using Borland C++ 3.1 and TASM.
The graphics are stored in .VGA files, I think makedat.cpp bundles these into spaced.dat.