NewPlayer.Update C# (CSharp) Method

    void Update()
    {
        if (controller.collisions.above || controller.collisions.below)
        {
            velocity.y = 0;
            jumped = false;
        }

        Vector2 input = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));

        if (canPull && Input.GetKeyDown(KeyCode.W))
        {
            lever.pull();
        }

        if (Input.GetKeyDown (KeyCode.Space) && controller.collisions.below)
        {
            velocity.y = jumpVelocity;
            jumped = true;
        }

        if (Input.GetKeyDown(KeyCode.Space) && !controller.collisions.below && jumped)
        {
            velocity.y = jumpVelocity;
            jumped = false;
        }

        if (Input.GetKeyDown(KeyCode.LeftShift) && !isCooldown)
        {

            if (Input.GetKey(KeyCode.A))
            {
                //velocity.y = 0;
                isCooldown = true;
                controller.Move(new Vector2(-flashDistance, 0));
            }

            else if (Input.GetKey(KeyCode.D))
            {
                //velocity.y = 0;
                isCooldown = true;
                controller.Move(new Vector2(flashDistance, 0));
            }

        }

        if (isCooldown)
            cooldown += Time.deltaTime;

        if (cooldown >= cooldownMax)
        {
            cooldown = 0;
            isCooldown = false;
        }

        float targetVelocityX = input.x * moveSpeed;
        velocity.x = Mathf.SmoothDamp(velocity.x, targetVelocityX, ref velocityXSmoothing, (controller.collisions.below)? accelerationTimeGrounded :accelerationTimeAirborne);
        velocity.y += gravity * Time.deltaTime;
        controller.Move(velocity* Time.deltaTime);
    }