The comedian told The Sun that the film was inspired by comedy Pee-wee's Big Adventure.
"It's partly a road trip, with a sick hamster and some badgers involved, plus some songs and guest appearances - the kind of thing I always do, but a bit longer and wider," he said.
Hill quit ITV series TV Burp last year.
"You got this new, knowing breed of shows, like The Only Way Is Essex, where the jokes were already built in, and there was no leverage for us," he said of his departure.
"Even Coronation Street became jokier. We'd kind of exhausted it. I think, in the end, we just about avoided it going a bit s**t.
"Following TV Burp is a bit like following Dark Side of the Moon. It's got to be really, really good."