At the "Press Start" screen, press B to display your last bounty. Press Select to display a password that represents your game status. The password is used for online contests.
Get all of the Chozo Artifacts to be sent to the Artifact Temple, where you must go into a blue light on the floor on the top screen. Get the weird balls into their slots in any order before Meta Ridley destroys them. Get them all in their slots to get to the Impact Crater.
