I was confused as to what it did, until I pressed 'I'm feeling sucky' and got 'Jutin Beiber sucks more than Socks' and the related tweets.

I suggest you start the page preloaded with an example like this which is curious and brings a laugh and which has then initiated many tweets you can also show. Maybe even just pre-run the 'I'm feeling sucky' once.

This way it's very clear from the outset what to do as this discover process is currently painful.