I hadn't known you're Finnish :))
Anyways, from a random reader's point of view, I'd expect the opening part to be longer and intriguing to make me crave for more if you know what I mean. The art of taking a reader into the manor of your fantasy is subtle but it makes the difference. Also, there's something that is said to be introduced by Hitchcock into cinematography but has thousands of year of tradition in literature - making a reader understand the background without having to tell them in a straightforward way as it makes one feel rather stupid (and eventually leave the novel or short story for something that wouldn't treat them as a dummie).