Move someone (or something) — Put John in the kitchen, Send Rex to the garden, Bring Mary into the living room (bring only makes sense for moving into the house, not out to the garden)
Work a door — there are two now, so say which: Open the kitchen door (between the kitchen and the living room), Close the garden door (between the living room and the garden)
Nobody can walk through a closed door — if you try, you'll be told which one to open first
Ask where someone is — Where is John?, Where's Rex?
Or ask who's in a room — Who is in the garden? — it'll say Nobody. if it's empty
Ask about a room or a door — Is Mary in the kitchen?, Is the kitchen door open?
Ask about sight lines — Can John see Mary?, Can John see Rex? — true if they share a room, or if every door between their rooms is open (the kitchen and the garden aren't next to each other, so seeing between them needs both doors open)
Or just tell it something — John is in the garden., The kitchen door is open., Rex can see Mary. — and it'll agree, or correct you if you've got it wrong
Rex is a dog, so he takes it, not he/she — that's on purpose
Leave the box empty and press Enter to let the computer get on with things by itself — it'll ask itself a question and answer it on your next empty Enter, or just wander someone to a new room or work a door