AceField/Scripts/Bullet.cs

using Godot;

namespace AceField.Scripts;

public partial class Bullet : Area2D
{
	[Export] public int PlayerId = 1;
	
	[Export] public float Speed = 1500;
	[Export] public double Damage = 8;

	[Export] public Timer FreeTimer;

	public override void _Ready()
	{
		FreeTimer.Timeout += QueueFree;

		BodyEntered += body =>
		{
			if (body is not Player player || player.PlayerId == PlayerId) return;
			player.TakeDamage(Damage);
			QueueFree();
		};
	}

	public override void _PhysicsProcess(double delta)
	{
		Position += -Transform.Y * Speed * (float)delta;
	}
}