Initial commit (we're 100% using Godot now)

src/entities/player/Player.cs

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+using Godot;
+using System;
+
+public partial class Player : CharacterBody2D
+{
+	// Constantes
+	private const float SPEED = 50.0f;
+	private const float JUMP_VELOCITY = -400.0f;
+
+	// Acciones
+	private bool RUN_ACTION;
+	private bool JUMP_ACTION;
+	private bool WALK_ACTION;
+	private bool WALK_RIGHT;
+	private bool WALK_LEFT;
+	private bool CROUCH_ACTION;
+
+	// Variables varias
+	private Vector2 screenSize;
+	private uint originalCollisionMask;
+
+	public override void _Ready()
+	{
+		screenSize = GetViewportRect().Size;
+		originalCollisionMask = CollisionMask;
+	}
+
+	public override void _Process(double delta)
+	{
+		// Actualizar acciones
+		RUN_ACTION = Input.IsActionPressed("run");
+		JUMP_ACTION = Input.IsActionPressed("jump");
+		WALK_ACTION = Input.IsActionPressed("move_left") || Input.IsActionPressed("move_right");
+		WALK_RIGHT = Input.IsActionPressed("move_right");
+		WALK_LEFT = Input.IsActionPressed("move_left");
+		CROUCH_ACTION = Input.IsActionPressed("crouch");
+
+		var sprite = GetNode<AnimatedSprite2D>("AnimatedSprite2D");
+
+		// Animaciones
+		sprite.Play();
+		sprite.FlipV = false;
+		sprite.FlipH = Velocity.X < 0;
+
+		// Movimiento con animaciones
+		if (Velocity.X != 0)
+		{
+			if (RUN_ACTION)
+			{
+				if (JUMP_ACTION && !IsOnFloor())
+					sprite.Animation = "jump";
+				else
+					sprite.Animation = "run";
+			}
+			else if (WALK_ACTION)
+			{
+				if (CROUCH_ACTION)
+					sprite.Animation = "crouch_walk";
+				else if (JUMP_ACTION && !IsOnFloor())
+					sprite.Animation = "jump";
+				else
+					sprite.Animation = "walk";
+			}
+		}
+		else // Idle
+		{
+			if (CROUCH_ACTION)
+				sprite.Animation = "crouch_idle";
+			else if (JUMP_ACTION && !IsOnFloor())
+				sprite.Animation = "jump";
+			else
+				sprite.Animation = "idle";
+		}
+	}
+
+	public override void _PhysicsProcess(double delta)
+	{
+		// Gravedad
+		if (!IsOnFloor())
+			Velocity += GetGravity() * (float)delta;
+
+		// Saltos
+		if (Input.IsActionJustPressed("jump") && IsOnFloor())
+		{
+			if (Input.IsActionPressed("crouch"))
+				Velocity = new Vector2(Velocity.X, 0.65f * JUMP_VELOCITY);
+			else if (Input.IsActionPressed("run"))
+				Velocity = new Vector2(Velocity.X, 1.15f * JUMP_VELOCITY);
+			else
+				Velocity = new Vector2(Velocity.X, JUMP_VELOCITY);
+		}
+
+		// Movimiento lateral
+		float direction = Input.GetAxis("move_left", "move_right");
+		if (direction != 0)
+		{
+			if (Input.IsActionPressed("run"))
+				Velocity = new Vector2(direction * 3 * SPEED, Velocity.Y);
+			else
+				Velocity = new Vector2(direction * SPEED, Velocity.Y);
+		}
+		else
+		{
+			Velocity = new Vector2(Mathf.MoveToward(Velocity.X, 0, SPEED), Velocity.Y);
+		}
+
+		// Caída de plataformas
+		if (IsOnPlatform() && Input.IsActionJustPressed("crouch"))
+			CollisionMask &= 1;
+
+		if (!Input.IsActionPressed("crouch") && CollisionMask != originalCollisionMask)
+			CollisionMask = originalCollisionMask;
+
+		MoveAndSlide();
+	}
+
+	private bool IsOnPlatform()
+	{
+		// En tu caso los "plataformas" tienen máscara 3
+		return IsOnFloor() && CollisionMask == 3;
+	}
+}

src/entities/player/Player.cs.uid

@@ -0,0 +1 @@
+uid://uvuk2xh0skdi