Smiley is basically a slasher film. It tries on a few fancy ideas like "What is evil?" or "What if there is a new evolutionary step from man to machine." In the end, though, this is just a slasher film. It is basically the ol' Bloody Mary story. If you do such and so three times then Smiley, who is a blank face with stitched up gashes for eyes and mouth, will pop up and kill. Our main character is the final girl type crippled with anxiety who's unsure what is really goiing on except that someone or something wants to kill her.
The film tries to be a little different but fails. On the other hand for a slasher film it has some style and the actors are a little above that of someone doing a used car commercial. Your enjoyment will depend deeply on your enjoyment of the genre.