The film makers were making another film completely, which did not work out. The final film is an offshoot of the initial idea, edited and completed in a single day.
The director Abhay Kumar was homeless (due to a massive bug infestation) during the time of the shoot. He spent a lot of early mornings at the beach which enabled him to get the surreal shots of the ship.
The voice of the alien in the film is the voice of Ann Abraham. It is actually the reversed voice over from ...Just That Sort of a Day (2010)
The earlier version of the film featured many different characters talking about the coming of aliens. But Omkar Shroff spoke with such conviction and belief that Abhay Kumar decided to make the whole film with him.