why doesnt the character move;-;

Questions & Answers
1

private Rigidbody2D rb;
public float dashSpeed;
private float dashTime;
public float startDashTime;
private int direction;

void Start()
{
    rb = GetComponent<Rigidbody2D>();
    dashTime = startDashTime;

}

void Update()
{
    if (direction == 0)
    {
        if (Input.GetKeyDown(KeyCode.LeftArrow))
        {
            direction = 1;
        }
        else if (Input.GetKeyDown(KeyCode.RightArrow))
        {
            direction = 2;
        }
        else if (Input.GetKeyDown(KeyCode.DownArrow))
        {
            direction = 3;
        }
        else if (Input.GetKeyDown(KeyCode.UpArrow))
        {
            direction = 4;
        }
        else
        {
            if (dashTime <= 0)
            {
                direction = 0;
                dashTime = startDashTime;
                rb.velocity = Vector2.zero;
            }
            else
            {
                dashTime -= Time.deltaTime;
                if (direction == 1)
                {
                    rb.velocity = Vector2.left * dashSpeed;
                }
                else if (direction == 2)
                {
                    rb.velocity = Vector2.right * dashSpeed;

                }
                else if (direction == 3)
                {
                    rb.velocity = Vector2.down * dashSpeed;

                }
                if (direction == 4)
                {
                    rb.velocity = Vector2.up * dashSpeed;

                }

            }
        }
    }

}

}

2

You have to make the big else outside of first if. Like this.

    if( direction == 0 )
	{
		if( Input.GetKeyDown( KeyCode.LeftArrow ) )
		{
			direction = 1;
		}
		else if( Input.GetKeyDown( KeyCode.RightArrow ) )
		{
			direction = 2;
		}
		else if( Input.GetKeyDown( KeyCode.DownArrow ) )
		{
			direction = 3;
		}
		else if( Input.GetKeyDown( KeyCode.UpArrow ) )
		{
			direction = 4;
		}
	}

And then the else. (Not inside the if, like you did).

    else
	{
		if( dashTime <= 0 )
		{
			direction = 0;
			dashTime = startDashTime;
			rb.velocity = Vector2.zero;
		}
		else
		{
			dashTime -= Time.deltaTime;
			if( direction == 1 )
			{
				rb.velocity = Vector2.left * dashSpeed;
			}
			else if( direction == 2 )
			{
				rb.velocity = Vector2.right * dashSpeed;
			}
			else if( direction == 3 )
			{
				rb.velocity = Vector2.down * dashSpeed;
			}
			if( direction == 4 )
			{
				rb.velocity = Vector2.up * dashSpeed;
			}
		}
	}