sadly this is a almost direct rip off of game that came out in the early 90's called privateer
As this is a nice follow up or revamp of the original it lacks something that I can not put words that privateer had. At least in privateer you had the ability to land on planets and get mission from there. There was also better description of the ships and equip. Spaceforce had no tutorial thats not so bad but if the manual is lacking also.
original:
http://en.wikipedia.org/wiki/Wing_Commander:_Privateer
you can download it at http://priv.solsector.net/files.htm been release to public free of charge