Good tutorial for making a menu?

I've searched around but have not found a good tutorial on how to make a start menu where you can choose different levels and/or how to unlock levels after beating others. So I was wondering if someone could point me towards one?

http://www.unifycommunity.com/wiki/index.php?title=PauseMenu

That's how to make a pause menu, good thing to look at. Try and figure it out from example. =)

Good luck!