Your name is yours alone: the first time you play, the server gives this browser a secret key for it. Saves and scores are kept on the server and checked there.
Move: north, south, east, west, up, down, in, out (or n s e w u d). Look: look, examine X, search X, read X, inventory (i). Act: take X, drop X, open X, push X, pull X, use X on Y, give X to Y, talk to X, ask X about Y, think, wait. Story: hint, journal, score, undo. Saves: save [slot], load [slot], saves, delete slot. restart starts a new game. Up and down arrows recall earlier commands.