sen·tence[ˈsentns, ˈsen(t)əns]NOUNa set of words that is complete in itself, typically containing a subject and predicate, conveying a statement, question, exclamation, or command, and consisting of a main clause and sometimes ONE OR MORE subordinate clauses
Sentences are not defined by punctuation. If the story reads as more than two sentences, it will be removed. If the title is a sentence and the story does not make sense without it, then it counts as a sentence. While your title is certainly not a sentence, your other sentences certainly reads as more than one. I'm not saying this to be rude or anything, and I genuinely hope you do not take it this way, as I really like the story, it's just more than two sentences.
@Poltergeist, actually, this is perfectly acceptable as two sentences. I don't know if they already changed it before i was here, so sorry if im beating a dead horse, although that does sound like fun, but as long as there is proper punctuation, such as commas around pieces that could be removed and have the sentence still make sense or semicolons to separate two connected ideas that aren't related, then this counts as two sentences. I say this as a sentence elitist.