An action-filled, not particularly logical romp through various SF scenes consciously knocked off from well-known movies.
Some of the scene descriptions are pretty good on their own, particularly in the visual sense. There's not a lot of narrative connecting them in places, so a GM will have to do some more work or be blessed with players who don't really care as long as they get to the next scripted scene. The bad guys aren't described much, but the GM could insert whatever hostile military force's uniforms and ranks he thought suitable.
I can't really sympathise with the authors' explanation on page 4 for the absurdities of the setting as a homage. ("Hister"?) If they wanted to write "Spaceballs the RPG", it could have been funnier than this.
On the whole, it seems workable as a non-serious pickup game, or salvageable for something more complex.