Sanae player script - shot class

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using SFML.Audio;
using SFML.Graphics;
using SFML.Window;
using DanmakufuDotNet;

public class TemplatePlayerShot : Entity
{
    public float Angle
    {
        set { _angle = Helper.AngleNormalize(Helper.AngleToRadians(value)); }
        get { return Helper.AngleToDegrees(_angle); }
    }
    public float Speed { get; set; }
    public float MaxSpeed { get; set; }
    public float Curve { get; set; }
    public int Delay { get; set; }
    public float Acceleration { get; set; }

    private float _angle;

    public override void Update()
    {
        if (Delay == 0)
        {
            X += Speed * (float)Math.Cos(_angle);
            Y += Speed * (float)Math.Sin(_angle);
            Angle += Curve;
            Sprite.Rotation = 360 - Angle;

            if (Acceleration != 0)
            {
                if (Acceleration > 0 && Speed < MaxSpeed)
                {
                    Speed += Acceleration;
                }
                else if (Acceleration < 0 && Speed > MaxSpeed)
                {
                    Speed -= Acceleration;
                }
            }
        }
        else
        {
            Delay--;
        }

        if (!Game.Playfield.IsInPlayfield(X, Y))
        {
            Destroy();
        }
    }
}