The commands are in upper case to make them easier to distinguish. However, except for passwords, MOO does not distinguish between upper and lower case. Don't use ending quotes. Same room only. Ditto with going into unoccupied rooms.
People love to have someone look at their work, from descriptions to seats to objects.
Just leave stuff where you find it, that's all anyone asks. Everything on a MOO is an object with an object number. The higher the number, the more recently something was created. Some objects are programmed to respond in ways similar to a player, but are actually constructs known as NPCs. These usually take the form of servants, pets, and wanderers.