Add camera delay

src/camera.rs

@@ -11,8 +11,11 @@ fn spawn_camera(mut commands: Commands) {
 fn follow_player(
     player: Single<&Transform, (With<Player>, Without<Camera2d>)>,
     mut camera: Single<&mut Transform, (With<Camera2d>, Without<Player>)>,
+    time: Res<Time>,
+    // camera.translation.y = player.translation.y; // without delay
 ) {
-    camera.translation.y = player.translation.y;
+    camera.translation.y = camera.translation.y
+        + (player.translation.y - camera.translation.y) * 3.0 * time.delta_secs(); // with delay
 }
 
 pub struct CameraPlugin;