Godot First 2d

using Godot;
using System;

public partial class Player : Area2D
{
    [Export]
    public int Speed { get; set; }

    public Vector2 ScreenSize;

    // Called when the node enters the scene tree for the first time.
    public override void _Ready()
    {
        ScreenSize = GetViewportRect().Size;
    }

    // Called every frame. 'delta' is the elapsed time since the previous frame.
    public override void _Process(double delta)
    {
        Vector2 velocity = Vector2.Zero;

        if (Input.IsActionPressed("move_right"))
        {
            velocity.X += 1;
            GD.Print("right");
        }

        if (Input.IsActionPressed("move_left"))
        {
            velocity.X -= 1;
            GD.Print("left");

        }

        if (Input.IsActionPressed("move_down"))
        {
            velocity.Y += 1;
            GD.Print("down");
        }

        if (Input.IsActionPressed("move_up"))
        {
            velocity.Y -= 1;
            GD.Print("up");
        }

        GD.Print($"X: {Position.X} Y: {Position.Y}");

        var sprite = GetNode<AnimatedSprite2D>("AnimatedSprite2D");

        if (velocity.Length() > 0)
        {
            velocity = velocity.Normalized() * Speed;
            sprite.Play();
        }
        else
        {
            sprite.Stop();
        }

        Position += velocity * (float)delta;
        Position = new Vector2(
            x: Mathf.Clamp(Position.X, 0, ScreenSize.X),
            y: Mathf.Clamp(Position.Y, 0, ScreenSize.Y)
            );

        if (velocity.X != 0)
        {
            sprite.Animation = "walk";
            sprite.FlipV = false;

            sprite.FlipH = velocity.X < 0;
        }
        else if (velocity.Y != 0)
        {
            sprite.Animation = "up";
            sprite.FlipV = velocity.Y > 0;
        }
    }
}