diff --git a/README.md b/README.md
index 4166dbc..7989a47 100644
--- a/README.md
+++ b/README.md
@@ -47,14 +47,14 @@ nix develop --command bash -c "cargo build"
     *   ~~Use Bevy's `States` (e.g., `Playing`, `GameOver`).~~
     *   ~~Transition to `GameOver` when `PlayerLives` reaches zero.~~
     *   ~~In the `GameOver` state: stop enemy spawning, stop player controls, display a "Game Over" message (using `bevy_ui`), potentially offer a restart option.~~
-*   **Scoring:**
-    *   Add a `Score` resource.
-    *   Increment the score in `check_bullet_collisions` when an enemy is hit.
+*   ~~**Scoring:**~~ **(DONE)**
+    *   ~~Add a `Score` resource.~~
+    *   ~~Increment the score in `check_bullet_collisions` when an enemy is hit.~~
     *   Consider different point values for different enemy types or hitting enemies during dives later.
-*   **Levels/Stages:**
-    *   Add a `CurrentStage` resource.
-    *   Define criteria for clearing a stage (e.g., destroying all enemies in a wave/formation).
-    *   Implement logic to advance to the next stage, potentially increasing difficulty (enemy speed, firing rate, different formations).
+*   ~~**Levels/Stages:**~~ **(DONE)**
+    *   ~~Add a `CurrentStage` resource.~~
+    *   ~~Define criteria for clearing a stage (e.g., destroying all enemies in a wave/formation).~~
+    *   ~~Implement logic to advance to the next stage, potentially increasing difficulty (enemy speed, firing rate, different formations).~~
 
 **2. Enemy Behavior - Formations & Attack Patterns:**
 
diff --git a/src/main.rs b/src/main.rs
index c561ff6..5970697 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -17,6 +17,13 @@ const PLAYER_SIZE: Vec2 = Vec2::new(30.0, 30.0);
 const ENEMY_SIZE: Vec2 = Vec2::new(40.0, 40.0);
 const BULLET_SIZE: Vec2 = Vec2::new(5.0, 15.0);
 
+// Formation constants
+const FORMATION_ROWS: usize = 4;
+const FORMATION_COLS: usize = 8;
+const FORMATION_ENEMY_COUNT: usize = FORMATION_ROWS * FORMATION_COLS;
+const FORMATION_X_SPACING: f32 = 60.0;
+const FORMATION_Y_SPACING: f32 = 50.0;
+const FORMATION_BASE_Y: f32 = WINDOW_HEIGHT / 2.0 - 150.0; // Top area for formation
 const STARTING_LIVES: u32 = 3;
 const PLAYER_RESPAWN_DELAY: f32 = 2.0;
 const PLAYER_INVINCIBILITY_DURATION: f32 = 2.0;
@@ -40,9 +47,13 @@ struct Enemy;
 
 #[derive(Component)]
 struct Invincible {
-    timer: Timer,
+   timer: Timer,
 }
 
+#[derive(Component)]
+struct FormationTarget {
+   position: Vec3,
+}
 // --- Resources ---
 #[derive(Resource)]
 struct EnemySpawnTimer {
@@ -56,9 +67,24 @@ struct PlayerLives {
 
 #[derive(Resource)]
 struct PlayerRespawnTimer {
-    timer: Timer,
+   timer: Timer,
+}
+#[derive(Resource)]
+struct Score {
+   value: u32,
 }
 
+#[derive(Resource)]
+struct CurrentStage {
+  number: u32,
+ waiting_for_clear: bool, // Flag to check if we should check for stage clear
+}
+
+#[derive(Resource)]
+struct FormationState {
+  next_slot_index: usize,
+  total_spawned_this_stage: usize,
+}
 // --- Game Over UI ---
 
 #[derive(Component)]
@@ -112,7 +138,41 @@ fn cleanup_game_entities(
    }
    // for entity in player_query.iter() {
    //     commands.entity(entity).despawn();
-   // }
+  // }
+}
+
+// --- Stage Management ---
+
+// Helper to access world directly in check_stage_clear
+fn check_stage_clear(world: &mut World) {
+  // Use manual resource access because we need mutable access to multiple resources
+ // Separate checks to manage borrows correctly
+ let mut should_clear = false;
+ if let Some(stage) = world.get_resource::<CurrentStage>() {
+     if stage.waiting_for_clear {
+         // Create the query *after* checking the flag
+         let mut enemy_query = world.query_filtered::<Entity, With<Enemy>>();
+         if enemy_query.iter(world).next().is_none() {
+             should_clear = true;
+         }
+     }
+ }
+
+ if should_clear {
+     // Get mutable resources only when needed
+     if let Some(mut stage) = world.get_resource_mut::<CurrentStage>() {
+         stage.number += 1;
+         stage.waiting_for_clear = false;
+         println!("Stage cleared! Starting Stage {}...", stage.number);
+     }
+     if let Some(mut formation_state) = world.get_resource_mut::<FormationState>() {
+         formation_state.next_slot_index = 0;
+         formation_state.total_spawned_this_stage = 0;
+     }
+     if let Some(mut spawn_timer) = world.get_resource_mut::<EnemySpawnTimer>() {
+         spawn_timer.timer.reset();
+     }
+ }
 }
 
 fn main() {
@@ -121,7 +181,7 @@ fn main() {
         .insert_resource(ClearColor(Color::rgb(0.0, 0.0, 0.0)))
         .add_plugins(DefaultPlugins.set(WindowPlugin {
             primary_window: Some(Window {
-                title: "Galaga :: Lives: 3".into(), // Initial title
+              title: "Galaga :: Stage: 1 Lives: 3 Score: 0".into(), // Initial title with stage
                 resolution: (WINDOW_WIDTH, WINDOW_HEIGHT).into(),
                 ..default()
             }),
@@ -134,9 +194,12 @@ fn main() {
             timer: Timer::new(Duration::from_secs_f32(PLAYER_RESPAWN_DELAY), TimerMode::Once)
         })
         .insert_resource(EnemySpawnTimer {
-            timer: Timer::new(Duration::from_secs_f32(0.5), TimerMode::Repeating),
-        })
-        // Add Systems
+           timer: Timer::new(Duration::from_secs_f32(0.5), TimerMode::Repeating),
+       })
+      .insert_resource(Score { value: 0 }) // Initialize score
+   .insert_resource(CurrentStage { number: 1, waiting_for_clear: false }) // Initialize stage and flag
+   .insert_resource(FormationState { next_slot_index: 0, total_spawned_this_stage: 0 }) // Initialize formation state
+   // Add Systems
         .add_systems(Startup, setup)
         // Systems running only when Playing
         .add_systems(Update, (
@@ -148,9 +211,11 @@ fn main() {
             check_bullet_collisions,
             check_player_enemy_collisions.run_if(player_vulnerable),
             respawn_player.run_if(should_respawn_player),
-            manage_invincibility,
-            // Game Over check is now implicit in check_player_enemy_collisions
-        ).run_if(in_state(AppState::Playing)))
+           manage_invincibility,
+           // check_stage_clear is now added separately below using .pipe(system)
+           // Game Over check is now implicit in check_player_enemy_collisions
+     ).run_if(in_state(AppState::Playing)))
+     .add_systems(Update, check_stage_clear.run_if(in_state(AppState::Playing))) // Add world-based system directly
         // Systems running regardless of state (or managing state transitions)
         .add_systems(Update, (
             update_window_title, // Keep title updated
@@ -283,60 +348,112 @@ fn move_bullets(
 
 fn spawn_enemies(
     mut commands: Commands,
-    time: Res<Time>,
-    mut timer: ResMut<EnemySpawnTimer>,
+   time: Res<Time>,
+  mut timer: ResMut<EnemySpawnTimer>,
+  mut stage: ResMut<CurrentStage>,
+  mut formation_state: ResMut<FormationState>, // Add formation state resource
 ) {
     timer.timer.tick(time.delta());
 
-    if timer.timer.just_finished() {
-        let x_pos = (fastrand::f32() - 0.5) * (WINDOW_WIDTH - ENEMY_SIZE.x);
+   // Only spawn if we haven't spawned the full formation for this stage yet
+   // AND the timer is finished
+   if formation_state.total_spawned_this_stage < FORMATION_ENEMY_COUNT && timer.timer.tick(time.delta()).just_finished() {
+       // Calculate grid position
+       let slot_index = formation_state.next_slot_index;
+       let row = slot_index / FORMATION_COLS;
+       let col = slot_index % FORMATION_COLS;
 
-        commands.spawn((
-            SpriteBundle {
-                sprite: Sprite {
-                    color: Color::rgb(1.0, 0.2, 0.2),
-                    custom_size: Some(ENEMY_SIZE),
-                    ..default()
-                },
-                transform: Transform::from_translation(Vec3::new(
-                    x_pos,
-                    WINDOW_HEIGHT / 2.0 - ENEMY_SIZE.y / 2.0,
-                    0.0
-                )),
-                ..default()
-            },
-            Enemy,
-        ));
-    }
+       // Calculate target position in formation
+       let target_x = (col as f32 - (FORMATION_COLS as f32 - 1.0) / 2.0) * FORMATION_X_SPACING;
+       let target_y = FORMATION_BASE_Y - (row as f32 * FORMATION_Y_SPACING);
+       let target_pos = Vec3::new(target_x, target_y, 0.0);
+
+       // Spawn position (still random at the top for now)
+       let spawn_x = (fastrand::f32() - 0.5) * (WINDOW_WIDTH - ENEMY_SIZE.x);
+       let spawn_y = WINDOW_HEIGHT / 2.0 - ENEMY_SIZE.y / 2.0;
+
+       commands.spawn((
+           SpriteBundle {
+               sprite: Sprite {
+                   color: Color::rgb(1.0, 0.2, 0.2),
+                   custom_size: Some(ENEMY_SIZE),
+                   ..default()
+               },
+               transform: Transform::from_translation(Vec3::new(spawn_x, spawn_y, 0.0)),
+               ..default()
+           },
+           Enemy,
+           FormationTarget { position: target_pos }, // Add the target position
+       ));
+
+       formation_state.next_slot_index = (slot_index + 1) % FORMATION_ENEMY_COUNT; // Cycle through slots if needed, though we stop spawning
+       formation_state.total_spawned_this_stage += 1;
+
+       // Mark that we are now waiting for enemies to be cleared
+       stage.waiting_for_clear = true;
+
+       // Reset timer only if we are still spawning more enemies for the formation
+       if formation_state.total_spawned_this_stage < FORMATION_ENEMY_COUNT {
+            timer.timer.reset();
+       } else {
+           println!("Full formation spawned for Stage {}", stage.number);
+       }
+   }
 }
 
 fn move_enemies(
-    mut query: Query<(Entity, &mut Transform), With<Enemy>>,
-    time: Res<Time>,
-    mut commands: Commands,
+  // Query now includes FormationTarget
+  mut query: Query<(Entity, &mut Transform, &FormationTarget), With<Enemy>>,
+  time: Res<Time>,
+  mut commands: Commands,
+  stage: Res<CurrentStage>, // Add stage resource for speed calculation
 ) {
-    for (entity, mut transform) in query.iter_mut() {
-        transform.translation.y -= ENEMY_SPEED * time.delta_seconds();
+   // Increase speed based on stage number
+   let current_speed = ENEMY_SPEED + (stage.number - 1) as f32 * 10.0;
+  let arrival_threshold = current_speed * time.delta_seconds() * 1.1; // Slightly more than one frame's movement
 
-        if transform.translation.y < -WINDOW_HEIGHT / 2.0 - ENEMY_SIZE.y {
-            commands.entity(entity).despawn();
-        }
-    }
+  for (entity, mut transform, target) in query.iter_mut() {
+      let current_pos = transform.translation;
+      let target_pos = target.position;
+      let direction = target_pos - current_pos;
+      let distance = direction.length();
+
+      if distance < arrival_threshold {
+          // Arrived at target
+          transform.translation = target_pos;
+          commands.entity(entity).remove::<FormationTarget>(); // Remove target so it stops moving
+          // TODO: Add an InFormation component/state later for attack dives
+          println!("Enemy {} reached formation target.", entity.index());
+      } else {
+          // Move towards target
+          let move_delta = direction.normalize() * current_speed * time.delta_seconds();
+          transform.translation += move_delta;
+      }
+
+      // Still despawn if somehow it goes way off screen (shouldn't happen with target seeking)
+      if transform.translation.y < -WINDOW_HEIGHT / 2.0 - ENEMY_SIZE.y * 2.0 {
+           println!("Despawning enemy {} that went off screen.", entity.index());
+           commands.entity(entity).despawn();
+      }
+  }
 }
 
 fn check_bullet_collisions(
     mut commands: Commands,
-    bullet_query: Query<(Entity, &Transform), With<Bullet>>,
-    enemy_query: Query<(Entity, &Transform), With<Enemy>>,
+   bullet_query: Query<(Entity, &Transform), With<Bullet>>,
+   enemy_query: Query<(Entity, &Transform), With<Enemy>>,
+   mut score: ResMut<Score>, // Add Score resource
 ) {
     for (bullet_entity, bullet_transform) in bullet_query.iter() {
         for (enemy_entity, enemy_transform) in enemy_query.iter() {
             let distance = bullet_transform.translation.distance(enemy_transform.translation);
 
             if distance < BULLET_ENEMY_COLLISION_THRESHOLD {
-                commands.entity(bullet_entity).despawn();
-                commands.entity(enemy_entity).despawn();
-                break;
+               commands.entity(bullet_entity).despawn();
+               commands.entity(enemy_entity).despawn();
+               score.value += 100; // Increment score
+               println!("Enemy hit! Score: {}", score.value); // Log score update
+               break;
             }
         }
     }
@@ -424,18 +541,22 @@ fn manage_invincibility(
              // Ensure player is visible when invincibility ends
              if let Some(ref mut vis) = visibility {
                   **vis = Visibility::Visible;
-            }
-        }
-    }
+          }
+       }
+   }
 }
 
 // New System: Update Window Title with Lives
 fn update_window_title(
-    lives: Res<PlayerLives>,
-    mut windows: Query<&mut Window>,
+  lives: Res<PlayerLives>,
+  score: Res<Score>,
+  stage: Res<CurrentStage>, // Add CurrentStage resource
+  mut windows: Query<&mut Window>,
 ) {
-    if lives.is_changed() {
-        let mut window = windows.single_mut();
-        window.title = format!("Galaga :: Lives: {}", lives.count);
+   // Update if lives or score changed
+   // Update if lives, score, or stage changed
+   if lives.is_changed() || score.is_changed() || stage.is_changed() {
+       let mut window = windows.single_mut();
+       window.title = format!("Galaga :: Stage: {} Lives: {} Score: {}", stage.number, lives.count, score.value);
     }
 }