Looking for help find the name of game that I used to play

[jonalt48]

I need some help finding the name of the rts game. All I could remember was that it had a distinguishable piano sound track with plays in one of the soundtracks C1 and D1 music notes. In addition, one of its mission was to find a starport like structure, and lastly it was released as a demo on PC magazine disk with its comic book