After I recently saw it, I now believe this is a comedy made for the younger teens. In some cultures, the language used may not be considered appropriate for teens in general, but every other aspect of it points to this conclusion about the target audience.
Playing on stereotypes about the Nazis, simple jokes that can be funny to the above mentioned audience and utterly unrealistic, yet funny characters. In my opinion, not that good, but not such a bad movie either. Partly reminiscent of the old French comedy movies about the Nazis, but no match for the humor of the legendary British Allo Allo.
Acting quality varies wildly between the actors: Katarina Zutic, for example, offers a pretty poor performance, while Nikolic offers a better presentation.