I have adapted my poster again, to include a small subtitle with the words 'A Short Film'. This will be underneath the title on the poster. This gives the poster a short-film look and implies meaning and a message. This will be one of the last drafts of my poster as I am happy with the results.
I also think I will keep the title as it suits the film and goes nicely with the message the film conveys. It has an enigmatic and ironic character which is perfectly suited to the film.