Level select menu and buttons with information on them?

I am creating a level select screen for my game and I would like to create a button that would show information about a level:

I would like this button to contain:

• A texture to represent the level

• How many stars have been achieved in that mission (classic mobile game progression system)

Doing the texture is simple but as for the progression representation I am unsure.

Can I create a label or a box WITHIN the button?

Is there a tutorial somewhere for creating a level select screen with completion information on the levels?

Thank you in advance

EDIT: Missed a question:

Is there a more efficient way of creating a level select screen besides just creating multiple 'if(GUI.Button...' statements?

I was considering a for loop but then I need different textures to be used for each of the levels and each need to contain different progression information.