Failure to change UI text.

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class TextController : MonoBehaviour {

    public Text text;

    private enum States {
        cell, mirror, sheets_0, lock_0, cell_mirror, sheets_1, lock_1, corridor_0, left_corridor, cell_2,
        stairs_2, courtyard, right_corridor, canteen, corridor_2, corridor_3, table, kitchen};
    private States myState;

    // Use this for initialization
    void Start () {
        myState = States.cell;
    }

    // Update is called once per frame
    void Update () {
        print (myState);
        if      (myState == States.cell)            {cell();}
        else if (myState == States.sheets_0)        {sheets_0();}
        else if (myState == States.sheets_1)        {sheets_1();}
        else if (myState == States.lock_0)          {lock_0();}
        else if (myState == States.lock_1)          {lock_1();}
        else if (myState == States.mirror)          {mirror();}
        else if (myState == States.cell_mirror)     {cell_mirror();}
        else if (myState == States.left_corridor)   {left_corridor();}
        else if (myState == States.cell_2)          {cell_2();}
        else if (myState == States.stairs_2)        {stairs_2();}
        else if (myState == States.kitchen)         {kitchen();}
        else if (myState == States.courtyard)       {courtyard();}
        else if (myState == States.right_corridor)  {right_corridor();}
        else if (myState == States.canteen)         {canteen();}
        else if (myState == States.corridor_2)      {corridor_2();}
        else if (myState == States.corridor_3)      {corridor_3();}
        else if (myState == States.table)           {table();}
    }

    void table() {
        text.text = "You walk over to the nearest table to you, it is made from heavy wood boards and appears to have been in the room " +
            "for an extremely long time. You can see small stains that look like they could be bits of food or drink. " +
                "This must be the prison's canteen\n\n" +
                "Press R to return to Roaming the canteen";
        if (Input.GetKeyDown(KeyCode.R))        {myState = States.canteen;}
    }

    void corridor_3() {
        text.text = "You're standing back in the corridor, now convincingly dressed as a cleaner. " +
            "You strongly consider the run for freedom.\n\n" +
                "Press S to take the Stairs, or U to Undress";
        if  (Input.GetKeyDown(KeyCode.S))   {myState = States.courtyard;}

    }

    void corridor_2() {
        text.text = "Back in the corridor, having declined to dress-up as a cleaner.\n\n" +
            "Press C to revisit the Closet, and S to climb the stairs";
        if (Input.GetKeyDown(KeyCode.S))    {myState = States.stairs_2;}
    }

    void canteen() {
        text.text = "You turn the key in the lock, noticing it takes less effort this time to open the doors. " +
            "You step into a large room, it must be big enough to hold 300 people. Lamps hang from the ceiling " +
                "and tables line the walls and fill the center of the room. At the far end you can see another door made, " +
                "this time of metal.\n\n" +
                "Press T to look at the Tables or D to look at the metal Door.";
        if (Input.GetKeyDown(KeyCode.T))        {myState = States.table;}
        else if (Input.GetKeyDown(KeyCode.S))   {myState = States.kitchen;}
    }

    void kitchen() {
        text.text = "You turn the key in the lock, noticing it takes less effort this time to open the doors. " +
            "You step into a large room, it must be big enough to hold 300 people. Lamps hang from the ceiling " +
                "and tables line the walls and fill the center of the room. At the far end you can see another door made, " +
                "this time of metal.\n\n" +
                "Press T to look at the Tables or D to look at the metal Door.";
        if (Input.GetKeyDown(KeyCode.T))        {myState = States.table;}
        else if (Input.GetKeyDown(KeyCode.S))   {myState = States.kitchen;}
    }

    void right_corridor () {
        text.text = "To your right there is a pair of wooden doors, this looks like a main entrance to a room. The lock on " +
            "them looks the same as the one in your cell.\n\n" +
                "Press R to Return to the standing, or O to open the double doors." ;
        if      (Input.GetKeyDown(KeyCode.R))   {myState = States.corridor_0;}
        else if (Input.GetKeyDown(KeyCode.O))   {myState = States.canteen;}
    }

    void courtyard () {
        text.text = "You walk through the courtyard dressed as a cleaner. " +
            "The guard tips his hat at you as you waltz past, claiming " +
                "your freedom. You heart races as you walk into the sunset.\n\n" +
                "Press P to Play again." ;
        if (Input.GetKeyDown(KeyCode.P))        {myState = States.cell;}
    }

    void left_corridor () {
        text.text = "Being as you cannot see the end of the corridor through the darkness, you take the torch from the wall " +
            "and head left. You soon come to a dead end, in the wall ther is a wooden door similar to the one on " +
                "Yyour cell.\n\n" +
                "Press R to Return to the corridor." ;
        if (Input.GetKeyDown(KeyCode.R))        {myState = States.corridor_0;}
    }

    void cell_2 () {
        text.text = "Unfortunately weilding a puny hairclip hasn't given you the " +
            "confidence to walk out into a courtyard surrounded by armed guards!\n\n" +
                "Press R to Retreat down the stairs" ;
        if (Input.GetKeyDown(KeyCode.R))        {myState = States.canteen;}
    }

    void stairs_2() {
        text.text = "You feel smug for picking the closet door open, and are still armed with " +
            "a hairclip (now badly bent). Even these achievements together don't give " +
                "you the courage to climb up the staris to your death!\n\n" +
                "Press R to Return to the corridor";
        if (Input.GetKeyDown(KeyCode.R))        {myState = States.corridor_2;}
    }

    void cell () {
        text.text = "You wake up in a prison cell, the walls are made of stone blocks and moss grows in the cracks. " +
            "On the bed you can see a pile of filthy sheets, on the wall hangs a broken mirror and the heavy " +
                "wooden door appears to be locked.\n\n" +
                "Press S to look at the Sheets, M to look at the Mirror or L to look at the Lock" ;
        if      (Input.GetKeyDown(KeyCode.S))   {myState = States.sheets_0;}
        else if (Input.GetKeyDown(KeyCode.M))   {myState = States.mirror;}
        else if (Input.GetKeyDown(KeyCode.L))   {myState = States.lock_0;}
    }

    void mirror() {
        text.text = "The mirror is smashed into fragments that are still loosley attatched to the frame. " +
            "One of the fragments seems to stick out more than the others and appears to be very loose.\n\n" +
                "Press T to Take the fragment, or R to continue Roaming cell" ;
        if      (Input.GetKeyDown(KeyCode.T))   {myState = States.cell_mirror;}
        else if (Input.GetKeyDown(KeyCode.R))   {myState = States.cell;}
    }

    void cell_mirror() {
        text.text = "After grabbing the mirror fragment, all of the pieces fell from the frame to the ground with a loud crash! " +
            "When you look back at the frame, you notice a small bronze key hanging from a thread, you tie the thread around " +
                "your neck and you stand up to survey your cell once more.\n\n" +
                "Press S to view Sheets, or L to view Lock" ;
        if      (Input.GetKeyDown(KeyCode.S))   {myState = States.sheets_1;}
        else if (Input.GetKeyDown(KeyCode.L))   {myState = States.lock_1;}
    }

    void sheets_0 () {
        text.text = "You can't believe you sleep in these things. Surely it's time somebody changed them. They are covered in " +
            "stains and marks of countless colours and you're glad you dont recognise the stain on the floor beneath the matress. " +
                "The sheets offer you no assistance in escaping.\n\n" +
                "Press R to continue Roaming your cell" ;
        if (Input.GetKeyDown(KeyCode.R))        {myState = States.cell;}
    }

    void sheets_1() {
        text.text = "Having a key doesn't seem to make the sheets look any better and they still offer you no help in escaping.\n\n " +
            "Press R to continue Roaming your cell" ;
        if (Input.GetKeyDown(KeyCode.R))        {myState = States.cell_mirror;}
    }

    void lock_0() {
        text.text = "The metal lock on the door is locked. Looking through the small keyhole you can see a dark corridor outside " +
            "with faint light reflecting on the we floor. The walls of the corridor seem to be made from the same stone as " +
                "your cell. Without a way to open the lock, it's useless.\n\n" +
                "Press R to continue Roaming your cell" ;
        if (Input.GetKeyDown(KeyCode.R))        {myState = States.cell;}
    }

    void lock_1() {
        text.text = "Looking closer at the lock, you can see that the thick metal is scratched and dented from years of use, " +
            "the small holes in the door above the lock also appear to show that it has been replaced several times. " +
                "The lock needs a small key to open it, perhapse the one you found will do the trick.\n\n" +
                "Press O to Open, or R to Return to your cell" ;
        if (Input.GetKeyDown (KeyCode.O))       {myState = States.corridor_0;}
        else if (Input.GetKeyDown (KeyCode.R))  {myState = States.cell_mirror;}
    }

    void corridor_0() {
        text.text = "The lock makes a quiet click after you insert the key and twist with some effort, it appears that the lock has not been used recently. " +
            "Stepping out into the corridor you can see no end to the left and a set of wooden doors down the corridor to your right. The walls of " +
                "were indeed made from the same stone, and the light eminates from a torch on the wall opposite your cell.\n\n" +
                "Press L to go Left or R to go Right";
        if (Input.GetKeyDown (KeyCode.L))       {myState = States.left_corridor;}
        else if (Input.GetKeyDown (KeyCode.R))  {myState = States.right_corridor;}
    }
}