Create your first 2D game in Godot - C# version

using System;
using Godot;

public partial class main_character : CharacterBody2D
{
    public const float Speed = 400.0f;
    public const float JumpVelocity = -900.0f;

    private AnimatedSprite2D sprite2d;

    public override void _Ready()
    {
        sprite2d = GetNode<AnimatedSprite2D>("Sprite2D");
        GD.Print(sprite2d);
    }

    // Get the gravity from the project settings to be synced with RigidBody nodes.
    public float gravity = ProjectSettings.GetSetting("physics/2d/default_gravity").AsSingle();



    public override void _PhysicsProcess(double delta)
    {
        Vector2 velocity = Velocity;

        // Animations
        if (Math.Abs(velocity.X) > 1)
            sprite2d.Animation = "running";
        else
            sprite2d.Animation = "default";

        // Add the gravity.
        if (!IsOnFloor()) {
            velocity.Y += gravity * (float)delta;
            sprite2d.Animation = "jumping";
        }

        // Handle Jump.
        if (Input.IsActionJustPressed("jump") && IsOnFloor())
            velocity.Y = JumpVelocity;

        // Get the input direction and handle the movement/deceleration.
        // As good practice, you should replace UI actions with custom gameplay actions.
        float direction = Input.GetAxis("left", "right");
        if (direction != 0)
        {
            velocity.X = direction * Speed;
        }
        else
        {
            velocity.X = Mathf.MoveToward(Velocity.X, 0, 12);
        }

        Velocity = velocity;
        MoveAndSlide();

        // Flip the sprite based on the direction.
        bool isLeft = velocity.X < 0;
        sprite2d.FlipH = isLeft;
    }
}