You could alter/save anything. Example could be you have a racing. Game. You could have a bunch of sprites for the road and sprites for obstacles. The player could login to the editor and move all the sprites around to have different maps. Then when they save, send all the position information to the server with a save name of their choosing. So when a player logs into the game they can enter ther other persons saved map info and play the level.
It's doable but not for a first game. Try doing some little games/apps first to gain knowledge before doing something like that. Doing it now would caus frustrations and possibly turn you off the wonderful program that constu t2 is.