"Night of the Creeps" is an exceptional film that starts with promises of horror/comedy B-movie camp and follows it the whole way through. It just works on so many levels, which include being a homage to more significant films of the horror genre (ex: Night of the Living Dead,) cranking out the camp for well placed laughs, and even being scary or exciting when it needs to be.
From the start, when we see men in bulbous alien suits running around in a futuristic spaceship, which then jumps to a black and white origin story that takes place in the 1950's as an obvious allusion to Cold War B-movies, we know this film is something special.
It lampoons many cliches of the 80's, which includes character archetypes (this takes place on a college campus,) subplots which include the hardened alcoholic cop with a checkered past or the nerd getting the sorority girl, and even the feel of 80's films (soundtrack and whatnot.) For its steadfast, deadpan silliness and innovation, this film can't possibly produce anything but pure fun.
So, if you're going to watch this 80's body horror film about college kids being zombified by alien slugs that incubate in the brain and you're expecting anything above silly, glorious camp, then you're in the wrong movie.