if statement not working correctly with keyinput

public bool upKeyReleased = false;
public bool downKeyReleased = false;
public bool leftKeyReleased = false;  // not currently used
public bool rightKeyReleased = false; // not currently used
public bool upKeyPressed = false;
public bool downKeyPressed = false;
public bool leftKeyPressed = false;   // not currently used
public bool rightKeyPressed = false;  // not currently used
public bool jumpKeyPressed = false;

public float speedF = 5;
public float speedFF = 1.8F;
public float speedB = 1.8F;
public float TurnSpeed = 200;
public float JumpSpeed = 10;
public float i;
public bool runF;
public bool runB;
public bool fall;
public bool MayJump;
public bool startedCounting;
public bool teleported;
public bool Jump;
public bool death;
public bool first;
public Transform Player;
public Rigidbody PlayerRagdoll;
public Animator anim;
public int CollisionCount = 0;
public Slider slider;
public AudioSource walksound;
private Rigidbody rb;


// Use this for initialization
void Start()
{
    rb = GetComponent<Rigidbody>();
    startedCounting = false;
    death = false;
    slider = Slider.FindObjectOfType<Slider>();
    AudioSource walksound = GetComponent<AudioSource>();
}

void Update()
{




    if (Input.GetKeyUp(KeyCode.W) || Input.GetKeyUp(KeyCode.UpArrow))
    {
        upKeyReleased = true;
        upKeyPressed = false;
    }
    else if (Input.GetKeyUp(KeyCode.S) || Input.GetKeyUp(KeyCode.DownArrow))
    {
        downKeyReleased = true;
        downKeyPressed = false;
    }
    else if (Input.GetKeyUp(KeyCode.A) || Input.GetKeyUp(KeyCode.LeftArrow))
    {
        leftKeyReleased = true;
        leftKeyPressed = false;
    }
    else if (Input.GetKeyUp(KeyCode.D) || Input.GetKeyUp(KeyCode.RightArrow))
    {
        rightKeyReleased = true;
        rightKeyPressed = false;
    }
    else if (Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.UpArrow))
    {
        upKeyPressed = true;
        upKeyReleased = false;
    }
    else if (Input.GetKey(KeyCode.S) || Input.GetKey(KeyCode.DownArrow))
    {
        downKeyPressed = true;
        downKeyReleased = false;
    }
    else if (Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow))
    {
        leftKeyPressed = true;
        leftKeyReleased = false;
    }
    else if (Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow))
    {
        rightKeyPressed = true;
        rightKeyReleased = false;
    }

    if (upKeyReleased || fall)
    {
        walksound.Stop();
    }

    else if (upKeyPressed && (!walksound.isPlaying))
    {
        walksound.Play();
        walksound.loop = true;
    }


    //if moving set run true
    if (upKeyPressed && !runB)
    {
        runF = true;
    }
    else
    {
        runF = false;
    }

    if (downKeyPressed && !runF)
    {
        runB = true;
    }
    else
    {
        runB = false;
    }


    // if not running running foreward animation and not falling
    if (runF && !runB && !fall && !this.anim.GetCurrentAnimatorStateInfo(0).IsName("run") && !this.anim.GetCurrentAnimatorStateInfo(0).IsName("fall"))
    {
        anim.Play("run", 0, 0f);
        print("running");
    }
    if (runB && !runF  && !fall && !this.anim.GetCurrentAnimatorStateInfo(0).IsName("back") && !this.anim.GetCurrentAnimatorStateInfo(0).IsName("fall"))
    {
        anim.Play("back", 0, 0f);
    }
    if (Input.GetKey(KeyCode.Space) && MayJump == true)
    {
        Jump = true;
    }
    else
    {
        if (CollisionCount != 0)
        {
            Jump = false;
        }
    }


    slider.value -= Time.deltaTime;
    // if not running play idle animation
    if (!fall && !runB && !runF && !this.anim.GetCurrentAnimatorStateInfo(0).IsName("idle"))
    {
        anim.Play("idle", 0, 0f);
    }
    if (this.anim.GetCurrentAnimatorStateInfo(0).IsName("idle"))
    {
        fall = false;
    }
    if(CollisionCount == 0)
    {
        StartCoroutine("WaitSeconds");
        if (startedCounting && !this.anim.GetCurrentAnimatorStateInfo(0).IsName("fall") && fall)
        {
            anim.Play("fall", 0, 0f);
        }
    }
    else
    {
        startedCounting = false;
    }
    //if no collsion play falling animation
    if (CollisionCount > 0)
    {
        if (this.anim.GetCurrentAnimatorStateInfo(0).IsName("fall"))
        {
            fall = false;
            anim.Play("idle", 0, 0f);
        }
    }


    if (GameObject.Find("Stick_Figure_T-pose ragdoll(Clone)"))
    {
        Destroy(gameObject);
    }
    if (slider.value == 0)
    {
        MayJump = false;
    }
    else
    {
        MayJump = true;
    }
}