The landing page is terrible. Before I can make head or tail of what this site is, you are telling me I've been logged in as a temporary user, I might lose my data yada yada. What data? What are you talking about? Do you mind introducing your site first?
You need a simple one-liner describing what or who your site is for.
Next, please don't use plain text links for films. Movie posters exist for a reason. You need images asap. Engagement will shoot up. The same goes for users.
Why are you hiding your rate buttons? You know hover doesn't work on touch devices, right? Even when they are visible, they are too faint. And too complicated. Don't make people think if a film is 1 to 5. Everyone's now used to Like or Dislike. Just keep it simple.
Lastly, on a meta level, when you are looking for advice on your app or startup, you should always first search HN for advice given to other people with similar ideas. For example, a quick search for your case brought these up:
http://news.ycombinator.com/item?id=2253574 for http://www.subzin.com/
http://news.ycombinator.com/item?id=519649 for http://www.greatmovieexperiment.com/
http://news.ycombinator.com/item?id=1767309 for http://watchth.is/
Good luck!