[Unity 4.6] Button Tracking UI System?

Hi, I'm trying to make a simple point and click game where the player must find hidden items in the scene and then progress to the next level (similar to 'Where's Wally?'). I'm not entirely sure where to start but I assume that some sort of button tracking system is the way to go.

I'm using the new unity4.6 UI system and I'm still trying to get my head around the UI and code involved. Any scripting language is fine but I'd prefer c# if possible, thanks.

Any help is appreciated and thanks in advance!