A way of doing pages is to have the sprites for level selection 1-20 then when you press next, you add 20 to their variable or number, so they then become the level selection for 21-40 etc. If you already have levels for 1-20 then I guess you are using some kind of ID for that. Or you could use different layouts if their placement alters quite a bit on the screen. Kinda depends on what you did to make your current level menu.