The movie is basically an attempt of making dark brooding version of Little Shop of horrors. The more you watch the more the similarities are going to come to light. From the creatures first feeding attempts to its reaction to blood. The lead character even shares a suckling seen similar to Rick morranis and audry.
I will give it is sufficiently changed from the source material to not call it a copy it does fit in line as far as plot development
I will give it is sufficiently changed from the source material to not call it a copy it does fit in line as far as plot development