feat: game start countdown added

Shared/Behaviours/Ball.cs

@@ -1,11 +1,15 @@
+using Microsoft.Xna.Framework.Audio;
+using Microsoft.Xna.Framework.Content;
+
 using Syntriax.Engine.Core;
+using Syntriax.Engine.Integration.MonoGame;
 using Syntriax.Engine.Network;
 using Syntriax.Engine.Physics2D;
 using Syntriax.Engine.Systems.Tween;
 
 namespace Pong.Behaviours;
 
-public class Ball : Behaviour2D, IFirstFrameUpdate, IPhysicsUpdate, INetworkEntity,
+public class Ball : Behaviour2D, IFirstFrameUpdate, ILoadContent, IPhysicsUpdate, INetworkEntity,
     IPacketListenerClient<Ball.BallUpdatePacket>,
     IPacketListenerClient<Ball.BallResetPacket>
 {
@@ -19,6 +23,8 @@ public class Ball : Behaviour2D, IFirstFrameUpdate, IPhysicsUpdate, INetworkEnti
     private INetworkCommunicatorServer? networkServer = null;
     private ITween? networkTween = null;
 
+    private SoundEffect? bounceSoundEffect = null;
+
     public void FirstActiveFrame()
     {
         BehaviourController.GetRequiredBehaviour<ICollider2D>().OnCollisionDetected.AddListener(OnCollisionDetected);
@@ -28,6 +34,11 @@ public class Ball : Behaviour2D, IFirstFrameUpdate, IPhysicsUpdate, INetworkEnti
         networkServer = Universe.FindBehaviour<INetworkCommunicatorServer>();
     }
 
+    public void LoadContent(ContentManager content)
+    {
+        bounceSoundEffect = content.Load<SoundEffect>("Audio/Bounce");
+    }
+
     public void LaunchBall(Vector2D launchDirection)
     {
         ResetBall();
@@ -74,6 +85,9 @@ public class Ball : Behaviour2D, IFirstFrameUpdate, IPhysicsUpdate, INetworkEnti
         else
             Transform.Position = packet.Position;
 
+        if (RigidBody.Velocity.MagnitudeSquared >= .01f)
+            bounceSoundEffect?.Play();
+
         RigidBody.Velocity = packet.Velocity;
         physicsEngine2D.StepIndividual(RigidBody, sender.Ping);
     }