Blind Monster Kata

Constrains

Write the core system of game, with the following rules:

There is a human in a room.
The room is represented throug a grid of tiles of arbitrary size.
The human starts in an arbitrary place in the room.
The human can move anywhere in the room.
The goal of the human is escaping the room. This is done by reaching the tile adjacent to the door.
The human makes noise while moving, but is silent if crouches.
Crouching makes movement 2x slower. If takes one second to move between 2 adjacent tiles, moving while crouching takes 2 seconds.
The passage of time is represented with a turn-based system. Each turn represents the same amount of time (eg: one sencond)
There is a monster in the room. The monster is blind, but can hear very well.
The monster starts at the tile adjacent to the door.
The monster is searching for the human. Will go to any tile where there is sound, at twice the walking speed the human has.
If the monster is in an adjacent tile with the human, will hear the heartbeat and localize it immediatly. Doing so will attack and kill the human.