Implement a singly linked list with appropriate functionality. Substitute all arrays that you have used so far in your project with instances of your linked list. Be careful to remove (or comment out) all code that is irrelevant (such as the counter in every Room to keep track of how full its Creature array is).
You should substitute at least the following: the array of Creature references that every Room contains, and any arrays that you use in your main method to parse the input file.