It depends on whether your game is Public or Private. In a Private game we assume you already know all the other individuals and so the game creator retains most of the critical Gamemaster functions, namely the ability to pause or change adjudication, replace inactive players, etc. Game creators in a private game will not be able to see orders submitted or private press from other powers as a regular Gamemaster normally would.
If your game is Public then the game creator retains none of these powers as the risk of abuse is too high. If you play in a public game you create you will not be able to change any of the game settings or adjudication once you have done the initial setup.