Can someone explain to me how to make a simple table of contents that links to levels

Unity Engine
1

I want to make a grid of buttons where each button loads a different level.

I am not a scripter, but have taken scripts off of the web and used them successfully.

Also - I am putting this on the iPad and want the buttons to function when touched - will extra scripting work be required for this or is a tap natively a click in Unity iOS?

2

One more thing - I’d like to make a button for each level that will return the user to the main grid of buttons (basically a “back” button. Each level is just a single image.