Castle of Fear (The Micro User type-in) - 2: Random Events

As you wander the castle, there are various random events taking place, leading to various messages on the screen.

• "A small dwarf walks up to you, says 'Hurry up', and then walks off." This message occurs with a 9% probability at first, and shows with increasing frequency as the number of turns used increases. It is just there to pressure the player.
• "Listen, you can hear strange voices." Just a random message for atmosphere.
• Your coin is stolen by a sprite: if you are carrying a coin, there is a chance (7%) it will be taken from you and placed in a random room of the castle. There is no way to avoid this.
• Troll behaviour:
• Movement of the troll: each turn, the troll moves randomly to one of the following rooms: a room that contains a jewel; the room the player is currently in; or a random room in the castle (note, he does not actually traverse the rooms in-between!).
• The troll may in fact carry multiple jewels at once, however this is not obvious to the player who is told only that the troll is carrying a jewel.
• If the troll is carrying a jewel, he will drop it in the room if it does not contain one already. This gives the message "You hear a distant WHOOOF!"
• Otherwise, if the room a troll is in contains a jewel, then the troll will pick it up. This gives the message "You hear a distant SLUURP!"
• There are 4 jewels in total. At the start of the game, there are 3 jewels placed around the castle and the troll is carrying one.
• You are killed suddenly by an event (such as a pendulum dropping from the ceiling). Although it is not obvious to the player, this is actually triggered by the troll's interaction with the jewels. You are killed if he succeeds in placing a jewel in each of 3 consecutively-aligned rooms in the castle.