restarting added

Program.cs

@@ -10,13 +10,15 @@ internal class Program
         uint gameWidth = 900;
         uint gameHeight = 504;
         float gravity = 800f;       // px/sec^2
-        float jumpForce = -300f;    // px/sec
-        float scrollSpeed = 150f;   // px/sec
+        float jumpForce = -300f;
+        float scrollSpeedInitial = 150f;// px/sec
+        float scrollSpeed = scrollSpeedInitial;   // px/sec
         float scrollDecay = 500f;  // px/sec^2
         float maxUpAngle = -30f;   // tilt up max
         float maxDownAngle = 60f;  // tilt down max
         float maxVelocity = 500f;  // velocity that corresponds to max tilt
         float backgroundSpeed = 0.75f;
+        int points = 0;
 
         // Pillars
         List<Pillar> pillars = new List<Pillar>();
@@ -99,6 +101,17 @@ internal class Program
         // Clock for deltaTime
         Clock clock = new Clock();
 
+        void Restart()
+        {
+            birdVelocity = 0;
+            pillars.Clear();
+            bird.Position = new Vector2f(100, gameHeight / 2f);
+            backgroundOffset = 0;
+            alive = true;
+            scrollSpeed = scrollSpeedInitial;
+            points = 0;
+        }
+
         while (window.IsOpen)
         {
             float deltaTime = clock.Restart().AsSeconds();
@@ -140,6 +153,11 @@ internal class Program
                 birdVelocity = jumpForce;
             }
 
+            if (!alive && Keyboard.IsKeyPressed(Keyboard.Key.Space))
+            {
+                Restart();
+            }
+
             // Update pillars
             pillarTimer += deltaTime;
             if (pillarTimer > spawnInterval)
@@ -177,11 +195,11 @@ internal class Program
             }
 
             if (!alive)
-{
+                {
                     // Gradually reduce speed towards 0
                     scrollSpeed -= scrollDecay * deltaTime;
                     if (scrollSpeed < 0) scrollSpeed = 0;
-}
+                }
 
             // Scroll background
             backgroundOffset += (long)(scrollSpeed * deltaTime * backgroundSpeed);
@@ -209,3 +227,4 @@ internal class Program
         }
     }
 }
+