Bottom line: This wasn't worth the watch.
I didn't have expectations for Star Leaf to be a *good* film, but I did expect it to be a *fun* film we watched around 420. I really like Russell Hodgkinson in Z-Nation and it seemed like they cast him in a similar role for this.
The good news is that Russell Hodgkinson's character is still pretty funny, but he doesn't actually get much screen time. Also, like a lot of these sorts of scifi movies, the park ranger is pretty weird and funny too. He also get's very little screen time. Star Leaf is mercifully short, so it has that going for it too.
The story is disjointed, the hallucinations aren't done well, and the "overall driver" they reveal later in the film just feels strange and forced. It felt like, for the most part, they forgot about what the description of the movie was and just shoehorned in some stuff about it periodically.
Ignoring the terrible story, you will *hate* all the main characters and their acting is atrocious on top of it.
If you keep the world, Russell Hodgkinson, and Richard Cranor (park ranger) then it could be a pretty fun TV show.