Okay, so first things first. Yes, Dark Star is a very low budget movie. You can see how cheap it is, and it was made around 1974, which doesn't help. But, the problem with the film itself is...the film.
So the basic plot is it's the future. Unsurprisingly. Aboard the ship, 'Dark Star', the crew Lt. Doolittle, Sgt. Pinback, Boiler and Talby have been on mission for 20 years. The captain has recently been killed, the ship's sustained damage, and they've all got cabin fever and going at each other's throats. Their job is to destroy 'unstable' planets to avert disasters, with the help of the computer and the entirety of the bomb bay, consisting of bombs that can talk. Sounds awesome.
During an interstellar storm, the ship is damaged, and a bomb malfunction begins to plague the crew, as well as the alien that won't stay put in the cargo hold-AND HOLD A DAMNED SECOND.
Rather than being dramatic, Dark Star wants to be a comedy. All this cool serious set up, and it wants to be funny. And that's the problem.
Yes there is an Alien. Yes, it is a beachball with some feet. Yes, it looks utter crap, and yes the actors even acknowledge how crap it is.
Parts of the film do work. The opening message is excellent, and the wrecked sleeping quarters look really nasty and cool. The acting is actually quite good, and the atmosphere is excellent. You really feel someone's gonna flip their shit at any moment, maybe break something or even kill another person. The computers are cool too. Polite, but in an almost clinical way, it's almost unnerving. And, no spoilers, but the penultimate scene between Lt. Doolittle and bomb 20 is incredible, and the last scene is just beautifully sad.
However, the whole film is plagued by overall premise. A sci-fi comedy. I got no problem with that, I love sci-fi comedy (I watch Dr. Who, that's funny enough in how badly it's written *critic critic smarm smarm*). However, it only half works. Science bit? Awesome. Comedy? Eh, no.
It's just trying too hard to be funny. Some bits are funny, but only heh-heh, giggle level funny. Nothing's laugh-out-loud, I think I'mgonnapissmyself funny. Any scene where it's funny feels drawn out until the film's going "ARE YOU LAUGHING YET? HOW ABOUT SOME MORE?". It's just dead as a comedy, it doesn't add anything to the film. It feels almost forced, it just isn't funny.
If it was just sci-fi, it would work beautifully. Go into ideas about time, cabin fever, and what it's like to be with the same people for 20 years. Just think. 20 years with the same people, and the only way out is the endlessness of space. Yeah, sounds awesome. Go all dark, maybe have some people flip their shit, murder, blood. Keep the last scene, just surf towards a planet to avoid the mad crewmembers.
However, the theme song for Dark Star is seriously one of the best I've ever heard. 'Benson, Arizona' is about a spaceman flying around the universe, visiting millions of stars, but missing the ones at home, along with their loved one. And that's just like the crew of Dark Star. Millions of light years away from earth, all alone in space. Beautiful.