Spoliers!
I am always a sucker for a mystery story but really every aspect of the mystery was really uninteresting. I think it has to do with the acting. I don't speak italian so maybe this is why I believe that, however the acting was terrible. It seems like a director issue though, because every actress reacted to everything the same way and as a result the felt all like the same character even though they were obviously different. And that reaction was barely reacting. There was a dead corpse a murderer among them and they barely seem to care. If that was supposed to be the joke then I guess I didn't find it funny. There should be at least an overdramatic reaction for this kind of joke to work. I suppose the aunt character was supposed to serve this purpose, but I personally found her extremely unfunny. As every other attempt at a joke. On paper I should have liked for example the joke where he dies in the end and we don't even see his face, let alone hear him speak, but the performances where so bad, it fell flat. I understand where that kiss came from but it was so unnatural the way it cane up, that I find it as a desparate attempt at a "juicy" moment because the movie was getting extremely dull. But that kiss was also dull because it came out of nowere and like everything else everybody barely cared at all. It's like the movie doesn't care at all about the aspects of the mystery and it wants to go over all the analysing and realisation and reaction to that as quickly as possible. And that is the only good thing about the movie, it is short. Five more minutes and I think I would get furious. You'd really better watch 3 25-minute youtube videos than this.