As a parody, it is well done. It embodies the weakness of the NMS execution as the "shallowness" of the playing experience most people had, and for that, it deserves 5 stars. I don't think anyone will disagree in this particular point, the game does his job very well, starting with the well-though name and going over the time of release.
Contrary to other people, I don't care that you didn't polish or add stuff, timing is important - What if Deus Ex guys waited till the WTC tragedy to release their game? If you waited more, no one would even remember NMS and would just think you made an horrible game (which is somewhat fair, since you intend to make a parody of ANOTHER horrible game, so it's intentional. An intentional failure is NOT a real one, since you accomplished what you always intended to do!).
Therefore I don't think there's a lack of polishment, and therefore it would not be fair to take out stars based on this. The pixelated graphics are just fine. Sound is fine too, no issues. The loading time is too long - Do you have it as part of the parody?
Now for the bad part. I hate NMS and all the hype, and that hate extends to everyhing related to NMS too. That includes parodies, parodies makers and those who review stuff about NMS/NMS related stuff. This means I hate your game, you, and myself (since just now I realized that I'm reviewing NMS related stuff). I will put this hate into practice by giving your game 0 stars without any reason. that's it. ZERO stars for your game.
Since it awarded 5 stars as an outstanding parody, but 0 stars as a game, I believe an average value (2,5 or even 3) is fair enough. I'll give you 3, you're above average.