Simple button using Unity 3D 4.5, 2D game

Questions & Answers
1

How do I make a simple button in a 2D game? Using Unity 3D 4.5. I already have a button.png image file, I have added it as a sprite/gameobject. Where do I get from here? I am targeting iOS, however I guess it shouldn’t matter.

(the next step will be to find out how to load another scene, replacing the first one, on the button tap)

2

You can use GUI.Button for buttons.
Unity can create 2D or 3D games, but GUI will work for either of them.

3

I’m sorry but I just went with Unity 4.6, and 2D stuff is just so much more simple there. No reason to use 4.5 at this point since 4.6 even was released yesterday.