Unity 2D Title Screen W/ Keyboard Input ONLY!

What I need is a title screen.

But... I don't want the player to have to click on the stupid buttons! What I want is one of those title screens from Zelda 2: Adventures of Link or, from a newer game, Elliot quest, where you use the keys [UP] and [DOWN] or [W] and [S] to scroll through a few options.

Basically this:

• Start Game

• Options

• Leave

And I want you to be able to scroll through those three texts. Also, I want a small sprite to be displayed before the option that you're choosing:

So, when you start, the small sprite would be on the first text:

• [+] Start game

• Options

• Leave

And then when you press down, the sprite moves down too.

• Start game

• [+] Options

• Leave

Like this. Then, I want it so you press enter to do that option. Each of which will simply send you to a new scene.

So... yeah I don't really know how to do all this, hence why I come to the Unity Answers site!

Please help.