particles/Particle.cs

using Godot;

public class Particle : Node2D
{
    private Sprite _spriteNode;
    private Label _labelNode;
    
    private ParticleType _type;
    private float _health = 0f;
    private float _averageSpeed = 1f;
    public Vector2 Velocity { get; set; }
    public float AverageSpeed { get => _averageSpeed; }

    public float Health
    {
        get => _health;
        set
        {
            _health = Mathf.Clamp(value, 0f, 1f);
            _spriteNode.Modulate = Color.FromHsv(_type.Hue, Health, 1);
        }
    }

    public ParticleType Type
    {
        get => _type;
        set
        {
            _type = value;
            _spriteNode.Modulate = Color.FromHsv(_type.Hue, Health, 1);
        }
    }

    public override void _Ready()
    {
        _spriteNode = GetNode<Sprite>("Sprite");
        _labelNode = GetNode<Label>("Label");
    }

    public void AddAverageSpeedValue(float speed)
    {
        _averageSpeed = (0.99f * _averageSpeed) + (0.01f * speed);
    }

    public void SetLabelText(string text)
    {
        _labelNode.Text = text;
    }
}