Well, that line in your description about the shadow creatures really comes out of left field for me. It completely changed the genre of the story in my mind. As such, it doesn't make me go, "Ooh, sounds interesting!" It just makes me think, "Wait, what?" in a rather confused way. The description prior to that point had no hint of conflict in it (which is what makes it 'boring,' so to speak). You could have easily said, "A man got up, went to work, came home to pizza alone, and went to bed after contemplating his boring existence." That's not to say it would have been a boring story; it's just that there's no visible conflict. With the shadow beings it seems you're trying to add conflict, but the jump is just too jarring. That can easily be fixed with your language. "Allen returned to the small town many years later, to meet old friends and new. But within the familiar setting from his childhood was something new. Something dark." (And so on.) This provides a transition between the two parts of your description that otherwise don't fit together at all.
Now, that advice was to make your description read better (as if it were a cover teaser). But no matter how well written your teaser is, if your actual story is boring, the story will be boring. Telling us what your story is about won't make us able to tell you how to make it more interesting. It's the actual writing we need to critique to tell you if it's interesting or not. Any synopsis of a story can be made to be boring or interesting; what really matters is the story itself.
(But if you are trying ti write an interesting description, too, I'd suggest writing it in first person, instead of just telling us the story's in first person. Let Allen talk to us. For that matter, let him talk to you, and you can decide if his story is interesting to you or not.)
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