chore: reorganize component definitions into relevant system files

src/game.rs

@@ -7,29 +7,19 @@ use crate::error::{GameError, GameResult, TextureError};
 use crate::events::GameEvent;
 use crate::map::builder::Map;
 use crate::map::direction::Direction;
-use crate::systems;
 use crate::systems::blinking::Blinking;
+use crate::systems::{self, ghost_collision_system};
 
 use crate::systems::movement::{BufferedDirection, Position, Velocity};
 use crate::systems::profiling::SystemId;
 use crate::systems::render::RenderDirty;
 use crate::systems::{
-    audio::{audio_system, AudioEvent, AudioResource},
-    blinking::blinking_system,
-    collision::collision_system,
-    components::{
-        AudioState, Collider, DeltaTime, DirectionalAnimated, EntityType, Frozen, Ghost, GhostBundle, GhostCollider, GlobalState,
-        ItemBundle, ItemCollider, LevelTiming, PacmanCollider, PlayerBundle, PlayerControlled, PlayerStateBundle, Renderable,
-        ScoreResource, StartupSequence,
-    },
-    debug::{debug_render_system, DebugFontResource, DebugState, DebugTextureResource},
-    ghost::{ghost_collision_system, ghost_movement_system},
-    item::item_system,
-    profiling::{profile, SystemTimings},
-    render::{
-        directional_render_system, dirty_render_system, hud_render_system, ready_visibility_system, render_system,
-        BackbufferResource, MapTextureResource,
-    },
+    audio_system, blinking_system, collision_system, debug_render_system, directional_render_system, dirty_render_system,
+    ghost_movement_system, hud_render_system, item_system, profile, ready_visibility_system, render_system, AudioEvent,
+    AudioResource, AudioState, BackbufferResource, Collider, DebugFontResource, DebugState, DebugTextureResource, DeltaTime,
+    DirectionalAnimated, EntityType, Frozen, Ghost, GhostBundle, GhostCollider, GlobalState, ItemBundle, ItemCollider,
+    LevelTiming, MapTextureResource, PacmanCollider, PlayerBundle, PlayerControlled, PlayerStateBundle, Renderable,
+    ScoreResource, StartupSequence, SystemTimings,
 };
 use crate::texture::animated::AnimatedTexture;
 use bevy_ecs::event::EventRegistry;
@@ -249,9 +239,9 @@ impl Game {
         );
 
         let input_system = profile(SystemId::Input, systems::input::input_system);
-        let player_control_system = profile(SystemId::PlayerControls, systems::player::player_control_system);
-        let player_movement_system = profile(SystemId::PlayerMovement, systems::player::player_movement_system);
-        let startup_stage_system = profile(SystemId::Stage, systems::stage::startup_stage_system);
+        let player_control_system = profile(SystemId::PlayerControls, systems::player_control_system);
+        let player_movement_system = profile(SystemId::PlayerMovement, systems::player_movement_system);
+        let startup_stage_system = profile(SystemId::Stage, systems::startup_stage_system);
         let player_tunnel_slowdown_system = profile(SystemId::PlayerMovement, systems::player::player_tunnel_slowdown_system);
         let ghost_movement_system = profile(SystemId::Ghost, ghost_movement_system);
         let collision_system = profile(SystemId::Collision, collision_system);

src/systems/audio.rs

@@ -6,10 +6,20 @@
 
 use bevy_ecs::{
     event::{Event, EventReader, EventWriter},
+    resource::Resource,
     system::{NonSendMut, ResMut},
 };
 
-use crate::{audio::Audio, error::GameError, systems::components::AudioState};
+use crate::{audio::Audio, error::GameError};
+
+/// Resource for tracking audio state
+#[derive(Resource, Debug, Clone, Default)]
+pub struct AudioState {
+    /// Whether audio is currently muted
+    pub muted: bool,
+    /// Current sound index for cycling through eat sounds
+    pub sound_index: usize,
+}
 
 /// Events for triggering audio playback
 #[derive(Event, Debug, Clone, Copy, PartialEq, Eq)]

src/systems/collision.rs

@@ -1,13 +1,37 @@
+use bevy_ecs::component::Component;
 use bevy_ecs::entity::Entity;
-use bevy_ecs::event::EventWriter;
+use bevy_ecs::event::{EventReader, EventWriter};
 use bevy_ecs::query::With;
-use bevy_ecs::system::{Query, Res};
+use bevy_ecs::system::{Commands, Query, Res, ResMut};
 
 use crate::error::GameError;
 use crate::events::GameEvent;
 use crate::map::builder::Map;
-use crate::systems::components::{Collider, GhostCollider, ItemCollider, PacmanCollider};
 use crate::systems::movement::Position;
+use crate::systems::{AudioEvent, CombatState, Ghost, PlayerControlled, ScoreResource};
+
+#[derive(Component)]
+pub struct Collider {
+    pub size: f32,
+}
+
+impl Collider {
+    /// Checks if this collider collides with another collider at the given distance.
+    pub fn collides_with(&self, other_size: f32, distance: f32) -> bool {
+        let collision_distance = (self.size + other_size) / 2.0;
+        distance < collision_distance
+    }
+}
+
+/// Marker components for collision filtering optimization
+#[derive(Component)]
+pub struct PacmanCollider;
+
+#[derive(Component)]
+pub struct GhostCollider;
+
+#[derive(Component)]
+pub struct ItemCollider;
 
 /// Helper function to check collision between two entities with colliders.
 pub fn check_collision(
@@ -82,3 +106,46 @@ pub fn collision_system(
         }
     }
 }
+
+pub fn ghost_collision_system(
+    mut commands: Commands,
+    mut collision_events: EventReader<GameEvent>,
+    mut score: ResMut<ScoreResource>,
+    pacman_query: Query<&CombatState, With<PlayerControlled>>,
+    ghost_query: Query<(Entity, &Ghost), With<GhostCollider>>,
+    mut events: EventWriter<AudioEvent>,
+) {
+    for event in collision_events.read() {
+        if let GameEvent::Collision(entity1, entity2) = event {
+            // Check if one is Pacman and the other is a ghost
+            let (pacman_entity, ghost_entity) = if pacman_query.get(*entity1).is_ok() && ghost_query.get(*entity2).is_ok() {
+                (*entity1, *entity2)
+            } else if pacman_query.get(*entity2).is_ok() && ghost_query.get(*entity1).is_ok() {
+                (*entity2, *entity1)
+            } else {
+                continue;
+            };
+
+            // Check if Pac-Man is energized
+            if let Ok(combat_state) = pacman_query.get(pacman_entity) {
+                if combat_state.is_energized() {
+                    // Pac-Man eats the ghost
+                    if let Ok((ghost_ent, _ghost_type)) = ghost_query.get(ghost_entity) {
+                        // Add score (200 points per ghost eaten)
+                        score.0 += 200;
+
+                        // Remove the ghost
+                        commands.entity(ghost_ent).despawn();
+
+                        // Play eat sound
+                        events.write(AudioEvent::PlayEat);
+                    }
+                } else {
+                    // Pac-Man dies (this would need a death system)
+                    // For now, just log it
+                    tracing::warn!("Pac-Man collided with ghost while not energized!");
+                }
+            }
+        }
+    }
+}

src/systems/components.rs

@@ -3,7 +3,10 @@ use bitflags::bitflags;
 
 use crate::{
     map::graph::TraversalFlags,
-    systems::movement::{BufferedDirection, Position, Velocity},
+    systems::{
+        movement::{BufferedDirection, Position, Velocity},
+        Collider, CombatState, ControlState, GhostCollider, ItemCollider, PacmanCollider, PlayerLifecycle,
+    },
     texture::{animated::AnimatedTexture, sprite::AtlasTile},
 };
 
@@ -109,63 +112,6 @@ bitflags! {
     }
 }
 
-#[derive(Component)]
-pub struct Collider {
-    pub size: f32,
-}
-
-impl Collider {
-    /// Checks if this collider collides with another collider at the given distance.
-    pub fn collides_with(&self, other_size: f32, distance: f32) -> bool {
-        let collision_distance = (self.size + other_size) / 2.0;
-        distance < collision_distance
-    }
-}
-
-/// Marker components for collision filtering optimization
-#[derive(Component)]
-pub struct PacmanCollider;
-
-#[derive(Component)]
-pub struct GhostCollider;
-
-#[derive(Component)]
-pub struct ItemCollider;
-
-#[derive(Bundle)]
-pub struct PlayerBundle {
-    pub player: PlayerControlled,
-    pub position: Position,
-    pub velocity: Velocity,
-    pub buffered_direction: BufferedDirection,
-    pub sprite: Renderable,
-    pub directional_animated: DirectionalAnimated,
-    pub entity_type: EntityType,
-    pub collider: Collider,
-    pub pacman_collider: PacmanCollider,
-}
-
-#[derive(Bundle)]
-pub struct ItemBundle {
-    pub position: Position,
-    pub sprite: Renderable,
-    pub entity_type: EntityType,
-    pub collider: Collider,
-    pub item_collider: ItemCollider,
-}
-
-#[derive(Bundle)]
-pub struct GhostBundle {
-    pub ghost: Ghost,
-    pub position: Position,
-    pub velocity: Velocity,
-    pub sprite: Renderable,
-    pub directional_animated: DirectionalAnimated,
-    pub entity_type: EntityType,
-    pub collider: Collider,
-    pub ghost_collider: GhostCollider,
-}
-
 #[derive(Resource)]
 pub struct GlobalState {
     pub exit: bool,
@@ -177,110 +123,6 @@ pub struct ScoreResource(pub u32);
 #[derive(Resource)]
 pub struct DeltaTime(pub f32);
 
-/// Resource for tracking audio state
-#[derive(Resource, Debug, Clone, Default)]
-pub struct AudioState {
-    /// Whether audio is currently muted
-    pub muted: bool,
-    /// Current sound index for cycling through eat sounds
-    pub sound_index: usize,
-}
-
-/// Lifecycle state for the player entity.
-#[derive(Component, Debug, Clone, Copy, PartialEq, Eq)]
-pub enum PlayerLifecycle {
-    Spawning,
-    Alive,
-    Dying,
-    Respawning,
-}
-
-impl PlayerLifecycle {
-    /// Returns true when gameplay input and movement should be active
-    pub fn is_interactive(self) -> bool {
-        matches!(self, PlayerLifecycle::Alive)
-    }
-}
-
-impl Default for PlayerLifecycle {
-    fn default() -> Self {
-        PlayerLifecycle::Spawning
-    }
-}
-
-/// Whether player input should be processed.
-#[derive(Component, Debug, Clone, Copy, PartialEq, Eq)]
-pub enum ControlState {
-    InputEnabled,
-    InputLocked,
-}
-
-impl Default for ControlState {
-    fn default() -> Self {
-        Self::InputLocked
-    }
-}
-
-/// Combat-related state for Pac-Man. Tick-based energizer logic.
-#[derive(Component, Debug, Clone, Copy, PartialEq, Eq)]
-pub enum CombatState {
-    Normal,
-    Energized {
-        /// Remaining energizer duration in ticks (frames)
-        remaining_ticks: u32,
-        /// Ticks until flashing begins (counts down to 0, then flashing is active)
-        flash_countdown_ticks: u32,
-    },
-}
-
-impl Default for CombatState {
-    fn default() -> Self {
-        CombatState::Normal
-    }
-}
-
-impl CombatState {
-    pub fn is_energized(&self) -> bool {
-        matches!(self, CombatState::Energized { .. })
-    }
-
-    pub fn is_flashing(&self) -> bool {
-        matches!(self, CombatState::Energized { flash_countdown_ticks, .. } if *flash_countdown_ticks == 0)
-    }
-
-    pub fn deactivate_energizer(&mut self) {
-        *self = CombatState::Normal;
-    }
-
-    /// Activate energizer using tick-based durations.
-    pub fn activate_energizer_ticks(&mut self, total_ticks: u32, flash_lead_ticks: u32) {
-        let flash_countdown_ticks = total_ticks.saturating_sub(flash_lead_ticks);
-        *self = CombatState::Energized {
-            remaining_ticks: total_ticks,
-            flash_countdown_ticks,
-        };
-    }
-
-    /// Advance one frame. When ticks reach zero, returns to Normal.
-    pub fn tick_frame(&mut self) {
-        if let CombatState::Energized {
-            remaining_ticks,
-            flash_countdown_ticks,
-        } = self
-        {
-            if *remaining_ticks > 0 {
-                *remaining_ticks -= 1;
-                if *flash_countdown_ticks > 0 {
-                    *flash_countdown_ticks -= 1;
-                }
-            }
-            if *remaining_ticks == 0 {
-                *self = CombatState::Normal;
-            }
-        }
-    }
-}
-
 /// Movement modifiers that can affect Pac-Man's speed or handling.
 #[derive(Component, Debug, Clone, Copy)]
 pub struct MovementModifiers {
@@ -332,6 +174,19 @@ impl LevelTiming {
 #[derive(Component, Debug, Clone, Copy)]
 pub struct Frozen;
 
+#[derive(Bundle)]
+pub struct PlayerBundle {
+    pub player: PlayerControlled,
+    pub position: Position,
+    pub velocity: Velocity,
+    pub buffered_direction: BufferedDirection,
+    pub sprite: Renderable,
+    pub directional_animated: DirectionalAnimated,
+    pub entity_type: EntityType,
+    pub collider: Collider,
+    pub pacman_collider: PacmanCollider,
+}
+
 /// Convenience bundle for attaching the hybrid FSM to the player entity
 #[derive(Bundle, Default)]
 pub struct PlayerStateBundle {
@@ -341,72 +196,23 @@ pub struct PlayerStateBundle {
     pub movement_modifiers: MovementModifiers,
 }
 
-#[derive(Resource, Debug, Clone, Copy)]
-pub enum StartupSequence {
-    /// Stage 1: Text-only stage
-    /// - Player & ghosts are hidden
-    /// - READY! and PLAYER ONE text are shown
-    /// - Energizers do not blink
-    TextOnly {
-        /// Remaining ticks in this stage
-        remaining_ticks: u32,
-    },
-    /// Stage 2: Characters visible stage
-    /// - PLAYER ONE text is hidden, READY! text remains
-    /// - Ghosts and Pac-Man are now shown
-    CharactersVisible {
-        /// Remaining ticks in this stage
-        remaining_ticks: u32,
-    },
-    /// Stage 3: Game begins
-    /// - Final state, game is fully active
-    GameActive,
+#[derive(Bundle)]
+pub struct ItemBundle {
+    pub position: Position,
+    pub sprite: Renderable,
+    pub entity_type: EntityType,
+    pub collider: Collider,
+    pub item_collider: ItemCollider,
 }
 
-impl StartupSequence {
-    /// Creates a new StartupSequence with the specified duration in ticks
-    pub fn new(text_only_ticks: u32, _characters_visible_ticks: u32) -> Self {
-        Self::TextOnly {
-            remaining_ticks: text_only_ticks,
-        }
-    }
-
-    /// Returns true if the timer is still active (not in GameActive state)
-    pub fn is_active(&self) -> bool {
-        !matches!(self, StartupSequence::GameActive)
-    }
-
-    /// Returns true if we're in the game active stage
-    pub fn is_game_active(&self) -> bool {
-        matches!(self, StartupSequence::GameActive)
-    }
-
-    /// Ticks the timer by one frame, returning transition information if state changes
-    pub fn tick(&mut self) -> Option<(StartupSequence, StartupSequence)> {
-        match self {
-            StartupSequence::TextOnly { remaining_ticks } => {
-                if *remaining_ticks > 0 {
-                    *remaining_ticks -= 1;
-                    None
-                } else {
-                    let from = *self;
-                    *self = StartupSequence::CharactersVisible {
-                        remaining_ticks: 60, // 1 second at 60 FPS
-                    };
-                    Some((from, *self))
-                }
-            }
-            StartupSequence::CharactersVisible { remaining_ticks } => {
-                if *remaining_ticks > 0 {
-                    *remaining_ticks -= 1;
-                    None
-                } else {
-                    let from = *self;
-                    *self = StartupSequence::GameActive;
-                    Some((from, *self))
-                }
-            }
-            StartupSequence::GameActive => None,
-        }
-    }
+#[derive(Bundle)]
+pub struct GhostBundle {
+    pub ghost: Ghost,
+    pub position: Position,
+    pub velocity: Velocity,
+    pub sprite: Renderable,
+    pub directional_animated: DirectionalAnimated,
+    pub entity_type: EntityType,
+    pub collider: Collider,
+    pub ghost_collider: GhostCollider,
 }

src/systems/debug.rs

@@ -3,11 +3,7 @@ use std::cmp::Ordering;
 
 use crate::constants::BOARD_PIXEL_OFFSET;
 use crate::map::builder::Map;
-use crate::systems::components::Collider;
-use crate::systems::input::CursorPosition;
-use crate::systems::movement::Position;
-use crate::systems::profiling::SystemTimings;
-use crate::systems::render::BackbufferResource;
+use crate::systems::{BackbufferResource, Collider, CursorPosition, Position, SystemTimings};
 use bevy_ecs::prelude::*;
 use glam::{IVec2, UVec2, Vec2};
 use sdl2::pixels::Color;

src/systems/ghost.rs

@@ -1,15 +1,4 @@
-use bevy_ecs::entity::Entity;
-use bevy_ecs::event::{EventReader, EventWriter};
-use bevy_ecs::query::{With, Without};
-use bevy_ecs::system::{Commands, Query, Res, ResMut};
-use rand::rngs::SmallRng;
-use rand::seq::IndexedRandom;
-use rand::SeedableRng;
-use smallvec::SmallVec;
-
-use crate::events::GameEvent;
-use crate::systems::audio::AudioEvent;
-use crate::systems::components::{Frozen, GhostCollider, ScoreResource};
+use crate::systems::components::Frozen;
 use crate::{
     map::{
         builder::Map,
@@ -17,10 +6,16 @@ use crate::{
         graph::{Edge, TraversalFlags},
     },
     systems::{
-        components::{CombatState, DeltaTime, Ghost, PlayerControlled},
+        components::{DeltaTime, Ghost},
         movement::{Position, Velocity},
     },
 };
+use bevy_ecs::query::Without;
+use bevy_ecs::system::{Query, Res};
+use rand::rngs::SmallRng;
+use rand::seq::IndexedRandom;
+use rand::SeedableRng;
+use smallvec::SmallVec;
 
 /// Autonomous ghost AI system implementing randomized movement with backtracking avoidance.
 pub fn ghost_movement_system(
@@ -73,46 +68,3 @@ pub fn ghost_movement_system(
         }
     }
 }
-
-pub fn ghost_collision_system(
-    mut commands: Commands,
-    mut collision_events: EventReader<GameEvent>,
-    mut score: ResMut<ScoreResource>,
-    pacman_query: Query<&CombatState, With<PlayerControlled>>,
-    ghost_query: Query<(Entity, &Ghost), With<GhostCollider>>,
-    mut events: EventWriter<AudioEvent>,
-) {
-    for event in collision_events.read() {
-        if let GameEvent::Collision(entity1, entity2) = event {
-            // Check if one is Pacman and the other is a ghost
-            let (pacman_entity, ghost_entity) = if pacman_query.get(*entity1).is_ok() && ghost_query.get(*entity2).is_ok() {
-                (*entity1, *entity2)
-            } else if pacman_query.get(*entity2).is_ok() && ghost_query.get(*entity1).is_ok() {
-                (*entity2, *entity1)
-            } else {
-                continue;
-            };
-
-            // Check if Pac-Man is energized
-            if let Ok(combat_state) = pacman_query.get(pacman_entity) {
-                if combat_state.is_energized() {
-                    // Pac-Man eats the ghost
-                    if let Ok((ghost_ent, _ghost_type)) = ghost_query.get(ghost_entity) {
-                        // Add score (200 points per ghost eaten)
-                        score.0 += 200;
-
-                        // Remove the ghost
-                        commands.entity(ghost_ent).despawn();
-
-                        // Play eat sound
-                        events.write(AudioEvent::PlayEat);
-                    }
-                } else {
-                    // Pac-Man dies (this would need a death system)
-                    // For now, just log it
-                    tracing::warn!("Pac-Man collided with ghost while not energized!");
-                }
-            }
-        }
-    }
-}

src/systems/item.rs

@@ -2,10 +2,7 @@ use bevy_ecs::{event::EventReader, prelude::*, query::With, system::Query};
 
 use crate::{
     events::GameEvent,
-    systems::{
-        audio::AudioEvent,
-        components::{CombatState, EntityType, ItemCollider, LevelTiming, PacmanCollider, ScoreResource},
-    },
+    systems::{AudioEvent, CombatState, EntityType, ItemCollider, LevelTiming, PacmanCollider, ScoreResource},
 };
 
 /// Determines if a collision between two entity types should be handled by the item system.

src/systems/mod.rs

@@ -17,3 +17,17 @@ pub mod player;
 pub mod profiling;
 pub mod render;
 pub mod stage;
+
+pub use self::audio::*;
+pub use self::blinking::*;
+pub use self::collision::*;
+pub use self::components::*;
+pub use self::debug::*;
+pub use self::ghost::*;
+pub use self::input::*;
+pub use self::item::*;
+pub use self::movement::*;
+pub use self::player::*;
+pub use self::profiling::*;
+pub use self::render::*;
+pub use self::stage::*;

src/systems/player.rs

@@ -1,7 +1,7 @@
 use bevy_ecs::{
-    entity::Entity,
+    component::Component,
     event::{EventReader, EventWriter},
-    prelude::{Commands, ResMut},
+    prelude::ResMut,
     query::With,
     system::{Query, Res},
 };
@@ -9,18 +9,110 @@ use bevy_ecs::{
 use crate::{
     error::GameError,
     events::{GameCommand, GameEvent},
-    map::builder::Map,
-    map::graph::Edge,
+    map::{builder::Map, graph::Edge},
     systems::{
-        components::{
-            AudioState, ControlState, DeltaTime, EntityType, Frozen, GhostCollider, GlobalState, MovementModifiers,
-            PlayerControlled, PlayerLifecycle, StartupSequence,
-        },
+        components::{DeltaTime, EntityType, GlobalState, MovementModifiers, PlayerControlled},
         debug::DebugState,
         movement::{BufferedDirection, Position, Velocity},
+        AudioState,
     },
 };
 
+/// Lifecycle state for the player entity.
+#[derive(Component, Debug, Clone, Copy, PartialEq, Eq)]
+pub enum PlayerLifecycle {
+    Spawning,
+    Alive,
+    Dying,
+    Respawning,
+}
+
+impl PlayerLifecycle {
+    /// Returns true when gameplay input and movement should be active
+    pub fn is_interactive(self) -> bool {
+        matches!(self, PlayerLifecycle::Alive)
+    }
+}
+
+impl Default for PlayerLifecycle {
+    fn default() -> Self {
+        PlayerLifecycle::Spawning
+    }
+}
+
+/// Whether player input should be processed.
+#[derive(Component, Debug, Clone, Copy, PartialEq, Eq)]
+pub enum ControlState {
+    InputEnabled,
+    InputLocked,
+}
+
+impl Default for ControlState {
+    fn default() -> Self {
+        Self::InputLocked
+    }
+}
+
+/// Combat-related state for Pac-Man. Tick-based energizer logic.
+#[derive(Component, Debug, Clone, Copy, PartialEq, Eq)]
+pub enum CombatState {
+    Normal,
+    Energized {
+        /// Remaining energizer duration in ticks (frames)
+        remaining_ticks: u32,
+        /// Ticks until flashing begins (counts down to 0, then flashing is active)
+        flash_countdown_ticks: u32,
+    },
+}
+
+impl Default for CombatState {
+    fn default() -> Self {
+        CombatState::Normal
+    }
+}
+
+impl CombatState {
+    pub fn is_energized(&self) -> bool {
+        matches!(self, CombatState::Energized { .. })
+    }
+
+    pub fn is_flashing(&self) -> bool {
+        matches!(self, CombatState::Energized { flash_countdown_ticks, .. } if *flash_countdown_ticks == 0)
+    }
+
+    pub fn deactivate_energizer(&mut self) {
+        *self = CombatState::Normal;
+    }
+
+    /// Activate energizer using tick-based durations.
+    pub fn activate_energizer_ticks(&mut self, total_ticks: u32, flash_lead_ticks: u32) {
+        let flash_countdown_ticks = total_ticks.saturating_sub(flash_lead_ticks);
+        *self = CombatState::Energized {
+            remaining_ticks: total_ticks,
+            flash_countdown_ticks,
+        };
+    }
+
+    /// Advance one frame. When ticks reach zero, returns to Normal.
+    pub fn tick_frame(&mut self) {
+        if let CombatState::Energized {
+            remaining_ticks,
+            flash_countdown_ticks,
+        } = self
+        {
+            if *remaining_ticks > 0 {
+                *remaining_ticks -= 1;
+                if *flash_countdown_ticks > 0 {
+                    *flash_countdown_ticks -= 1;
+                }
+            }
+            if *remaining_ticks == 0 {
+                *self = CombatState::Normal;
+            }
+        }
+    }
+}
+
 /// Processes player input commands and updates game state accordingly.
 ///
 /// Handles keyboard-driven commands like movement direction changes, debug mode

src/systems/render.rs

@@ -1,11 +1,10 @@
 use crate::constants::CANVAS_SIZE;
 use crate::error::{GameError, TextureError};
 use crate::map::builder::Map;
-use crate::systems::blinking::Blinking;
-use crate::systems::components::{
-    DeltaTime, DirectionalAnimated, EntityType, GhostCollider, PlayerControlled, Renderable, ScoreResource, StartupSequence,
+use crate::systems::{
+    Blinking, DeltaTime, DirectionalAnimated, EntityType, GhostCollider, PlayerControlled, Position, Renderable, ScoreResource,
+    StartupSequence, Velocity,
 };
-use crate::systems::movement::{Position, Velocity};
 use crate::texture::sprite::SpriteAtlas;
 use crate::texture::text::TextTexture;
 use bevy_ecs::entity::Entity;

src/systems/stage.rs

@@ -1,9 +1,80 @@
 use bevy_ecs::{
     prelude::{Commands, Entity, Query, With},
+    resource::Resource,
     system::ResMut,
 };
 
-use crate::systems::components::{Frozen, GhostCollider, PlayerControlled, StartupSequence};
+use crate::systems::{Frozen, GhostCollider, PlayerControlled};
+
+#[derive(Resource, Debug, Clone, Copy)]
+pub enum StartupSequence {
+    /// Stage 1: Text-only stage
+    /// - Player & ghosts are hidden
+    /// - READY! and PLAYER ONE text are shown
+    /// - Energizers do not blink
+    TextOnly {
+        /// Remaining ticks in this stage
+        remaining_ticks: u32,
+    },
+    /// Stage 2: Characters visible stage
+    /// - PLAYER ONE text is hidden, READY! text remains
+    /// - Ghosts and Pac-Man are now shown
+    CharactersVisible {
+        /// Remaining ticks in this stage
+        remaining_ticks: u32,
+    },
+    /// Stage 3: Game begins
+    /// - Final state, game is fully active
+    GameActive,
+}
+
+impl StartupSequence {
+    /// Creates a new StartupSequence with the specified duration in ticks
+    pub fn new(text_only_ticks: u32, _characters_visible_ticks: u32) -> Self {
+        Self::TextOnly {
+            remaining_ticks: text_only_ticks,
+        }
+    }
+
+    /// Returns true if the timer is still active (not in GameActive state)
+    pub fn is_active(&self) -> bool {
+        !matches!(self, StartupSequence::GameActive)
+    }
+
+    /// Returns true if we're in the game active stage
+    pub fn is_game_active(&self) -> bool {
+        matches!(self, StartupSequence::GameActive)
+    }
+
+    /// Ticks the timer by one frame, returning transition information if state changes
+    pub fn tick(&mut self) -> Option<(StartupSequence, StartupSequence)> {
+        match self {
+            StartupSequence::TextOnly { remaining_ticks } => {
+                if *remaining_ticks > 0 {
+                    *remaining_ticks -= 1;
+                    None
+                } else {
+                    let from = *self;
+                    *self = StartupSequence::CharactersVisible {
+                        remaining_ticks: 60, // 1 second at 60 FPS
+                    };
+                    Some((from, *self))
+                }
+            }
+            StartupSequence::CharactersVisible { remaining_ticks } => {
+                if *remaining_ticks > 0 {
+                    *remaining_ticks -= 1;
+                    None
+                } else {
+                    let from = *self;
+                    *self = StartupSequence::GameActive;
+                    Some((from, *self))
+                }
+            }
+            StartupSequence::GameActive => None,
+        }
+    }
+}
 
 /// Handles startup sequence transitions and component management
 pub fn startup_stage_system(

tests/collision.rs

@@ -5,9 +5,7 @@ use pacman::{
     events::GameEvent,
     map::builder::Map,
     systems::{
-        collision::{check_collision, collision_system},
-        components::{Collider, EntityType, Ghost, GhostCollider, ItemCollider, PacmanCollider},
-        movement::Position,
+        check_collision, collision_system, Collider, EntityType, Ghost, GhostCollider, ItemCollider, PacmanCollider, Position,
     },
 };
 

tests/item.rs

@@ -4,10 +4,8 @@ use pacman::{
     events::GameEvent,
     map::builder::Map,
     systems::{
-        audio::AudioEvent,
-        components::{AudioState, EntityType, ItemCollider, PacmanCollider, ScoreResource},
-        item::{is_valid_item_collision, item_system},
-        movement::Position,
+        is_valid_item_collision, item_system, AudioEvent, AudioState, EntityType, ItemCollider, PacmanCollider, Position,
+        ScoreResource,
     },
 };
 

tests/player.rs

@@ -8,10 +8,8 @@ use pacman::{
         graph::{Edge, TraversalFlags},
     },
     systems::{
-        components::{AudioState, DeltaTime, EntityType, GlobalState, PlayerControlled},
-        debug::DebugState,
-        movement::{BufferedDirection, Position, Velocity},
-        player::{can_traverse, player_control_system, player_movement_system},
+        can_traverse, player_control_system, player_movement_system, AudioState, BufferedDirection, DebugState, DeltaTime,
+        EntityType, GlobalState, PlayerControlled, Position, Velocity,
     },
 };