Options & Menus:
If you press start you'll automatically pause the game, and the main menu will pop up. Here -depending on what you're currently doing you can do a variety of, mostly self-explanatory, things such as re-watch any missed tutorials, fiddle with some options regarding the screen, or check on your LPB messages/friends.
Popit:
The Popit is the little menu you can bring up with Square at almost any time.
In the Popit you will gradually and quickly gain more options until all options below are available.
The options and corresponding icons are like this:
Frog Sperm: Popit Cursor
Question: Do a new Tutorial when available
Heart: Heart Menu
Bag: Fun things Menu
Sackboy: Customize your Sackboy Menu
Sticker: Sticker & Decorations Menu
Bag w/wheels: Tools Menu
Text bubble: Enter Chat Screen
Burn Sackboy: Retry the area by holding X
Some options can only be used during Creation Mode, keep that in mind.