diff --git a/src/drops.rs b/src/drops.rs
index 6b93ffc..fc919e9 100644
--- a/src/drops.rs
+++ b/src/drops.rs
@@ -1,13 +1,14 @@
 use bevy::{
     prelude::*,
     sprite::{MaterialMesh2dBundle, Mesh2dHandle},
-    utils::HashSet,
+    utils::{Duration, HashSet},
 };
 use bevy_rand::prelude::*;
 use bevy_rapier2d::prelude::*;
 use rand::Rng;
 
 use crate::{
+    game_state::GameTimer,
     player::{LifeChangeEvent, Player},
     scene::SceneObj,
     GameState, GameplaySet, METER,
@@ -29,6 +30,7 @@ pub fn spawner_plugin(app: &mut App) {
         .add_event::<CrateDropEvent>()
         .add_event::<CrateCollision>()
         .add_systems(OnEnter(GameState::InGame), add_timer.in_set(GameplaySet))
+        .add_systems(OnExit(GameState::InGame), cleanup.in_set(GameplaySet))
         .add_systems(
             Update,
             (
@@ -37,13 +39,65 @@ pub fn spawner_plugin(app: &mut App) {
                 crate_collisions,
                 delete_on_env_coll,
                 player_coll,
+                update_timer_for_difficulty,
             )
                 .in_set(GameplaySet),
         );
 }
 
+fn cleanup(
+    timer: Query<Entity, With<SpawnTimer>>,
+    crates: Query<Entity, With<DroppedCrate>>,
+    mut commands: Commands,
+) {
+    commands.entity(timer.single()).despawn();
+    for e in &crates {
+        commands.entity(e).despawn();
+    }
+}
+
 fn add_timer(mut commands: Commands) {
-    commands.spawn(SpawnTimer(Timer::from_seconds(2., TimerMode::Repeating)));
+    commands.spawn(SpawnTimer(Timer::from_seconds(0.2, TimerMode::Repeating)));
+}
+
+fn update_timer_for_difficulty(
+    mut spawn_timer: Query<&mut SpawnTimer>,
+    mut game_timer: Query<&mut GameTimer>,
+    time: Res<Time>,
+) {
+    let game_time = game_timer
+        .single_mut()
+        .game_time
+        .tick(time.delta())
+        .elapsed_secs() as i32;
+
+    println!("time: {game_time}s");
+
+    spawn_timer
+        .single_mut()
+        .0
+        .set_duration(Duration::from_millis(match game_time {
+            0..=9 => 2000,
+            10..=19 => 1000,
+            20..=29 => 500,
+            30..=39 => 400,
+            40..=49 => 350,
+            50..=59 => 300,
+            60..=69 => 250,
+            70..=79 => 200,
+            80..=89 => 175,
+            90..=99 => 150,
+            100..=109 => 125,
+            110..=119 => 100,
+            120..=129 => 90,
+            130..=139 => 80,
+            140..=149 => 70,
+            150..=159 => 60,
+            160..=169 => 50,
+            170..=179 => 25,
+            180.. => 10,
+            ..=-1 => unreachable!(),
+        }));
 }
 
 fn drop_crates(
diff --git a/src/game_over_menu.rs b/src/game_over_menu.rs
new file mode 100644
index 0000000..13a9b8c
--- /dev/null
+++ b/src/game_over_menu.rs
@@ -0,0 +1,121 @@
+use bevy::{app::AppExit, prelude::*};
+
+use crate::{game_state::GameTimer, GameState};
+pub fn game_over_menu_plugin(app: &mut App) {
+    app.add_systems(
+        OnEnter(GameState::GameOver),
+        game_over_menu_setup.in_set(GameOverMenuSet),
+    )
+    .add_systems(Update, button_action.in_set(GameOverMenuSet))
+    .add_systems(OnExit(GameState::GameOver), exit_menu);
+}
+
+#[derive(Component)]
+struct GameOverMenu;
+
+#[derive(SystemSet, Debug, Clone, PartialEq, Eq, Hash)]
+pub struct GameOverMenuSet;
+
+#[derive(Component)]
+enum ButtonAction {
+    Retry,
+    MainMenu,
+}
+
+fn exit_menu(
+    to_despawn: Query<Entity, With<GameOverMenu>>,
+    game_timer: Query<Entity, With<GameTimer>>,
+    mut commands: Commands,
+) {
+    commands.entity(game_timer.single()).despawn();
+    for e in &to_despawn {
+        commands.entity(e).despawn_recursive();
+    }
+}
+
+fn game_over_menu_setup(mut commands: Commands, timer: Query<&GameTimer>) {
+    commands
+        .spawn((
+            NodeBundle {
+                style: Style {
+                    align_items: AlignItems::Center,
+                    justify_content: JustifyContent::Center,
+
+                    flex_direction: FlexDirection::Column,
+                    width: Val::Percent(100.0),
+                    height: Val::Percent(100.0),
+                    ..default()
+                },
+                ..default()
+            },
+            GameOverMenu,
+        ))
+        .with_children(|parent| {
+            parent.spawn(TextBundle::from_section(
+                format!(
+                    "Your score: {:.0}",
+                    timer.single().game_time.elapsed_secs() * 100.
+                ),
+                TextStyle {
+                    font_size: 96.,
+                    ..default()
+                },
+            ));
+            let btn_style = Style {
+                width: Val::Px(300.0),
+                height: Val::Px(80.0),
+                margin: UiRect::all(Val::Px(20.0)),
+
+                justify_content: JustifyContent::Center,
+                align_items: AlignItems::Center,
+                ..default()
+            };
+            let btn_txt_style = TextStyle {
+                font_size: 64.,
+                ..default()
+            };
+            parent
+                .spawn((
+                    ButtonBundle {
+                        style: btn_style.clone(),
+                        background_color: Color::rgb(0.3, 0.3, 0.3).into(),
+                        ..default()
+                    },
+                    ButtonAction::Retry,
+                ))
+                .with_children(|parent| {
+                    parent.spawn(TextBundle::from_section("Retry", btn_txt_style.clone()));
+                });
+            parent
+                .spawn((
+                    ButtonBundle {
+                        style: btn_style.clone(),
+                        background_color: Color::rgb(0.3, 0.3, 0.3).into(),
+                        ..default()
+                    },
+                    ButtonAction::MainMenu,
+                ))
+                .with_children(|parent| {
+                    parent.spawn(TextBundle::from_section("Main Menu", btn_txt_style.clone()));
+                });
+        });
+}
+
+fn button_action(
+    interaction_query: Query<(&Interaction, &ButtonAction), (Changed<Interaction>, With<Button>)>,
+    mut ev_exit: EventWriter<AppExit>,
+    mut game_state: ResMut<NextState<GameState>>,
+) {
+    for (interaction, action) in &interaction_query {
+        if *interaction == Interaction::Pressed {
+            match action {
+                ButtonAction::MainMenu => {
+                    game_state.set(GameState::MainMenu);
+                }
+                ButtonAction::Retry => {
+                    game_state.set(GameState::InGame);
+                }
+            }
+        }
+    }
+}
diff --git a/src/game_state.rs b/src/game_state.rs
index 5f462b1..beecdcd 100644
--- a/src/game_state.rs
+++ b/src/game_state.rs
@@ -1,25 +1,30 @@
 use bevy::{prelude::*, time::Stopwatch};
 
-use crate::GameplaySet;
+use crate::{GameState, GameplaySet};
 
 #[derive(Component)]
-pub struct GameState {
-    game_time: Stopwatch,
+pub struct GameTimer {
+    pub game_time: Stopwatch,
 }
 
 #[derive(Component)]
-struct StateText;
+struct ScoreText;
 
 pub fn state_and_ui_plugin(app: &mut App) {
     app.add_systems(
-        OnEnter(crate::GameState::InGame),
+        OnEnter(GameState::InGame),
         (setup_gamestate, setup_ui).in_set(GameplaySet),
     )
-    .add_systems(Update, (update_time).in_set(GameplaySet));
+    .add_systems(Update, update_time.in_set(GameplaySet))
+    .add_systems(OnExit(GameState::InGame), cleanup_ui.in_set(GameplaySet));
+}
+
+fn cleanup_ui(e: Query<Entity, With<ScoreText>>, mut commands: Commands) {
+    commands.entity(e.single()).despawn()
 }
 
 fn setup_gamestate(mut commands: Commands) {
-    commands.spawn(GameState {
+    commands.spawn(GameTimer {
         game_time: Stopwatch::new(),
     });
 }
@@ -36,13 +41,13 @@ fn setup_ui(mut commands: Commands) {
             right: Val::Px(5.0),
             ..default()
         }),
-        StateText,
+        ScoreText,
     ));
 }
 
 fn update_time(
-    mut state_txt: Query<&mut Text, With<StateText>>,
-    mut game_state: Query<&mut GameState>,
+    mut state_txt: Query<&mut Text, With<ScoreText>>,
+    mut game_state: Query<&mut GameTimer>,
     time: Res<Time>,
 ) {
     let mut txt = state_txt.single_mut();
diff --git a/src/main.rs b/src/main.rs
index 33817ab..4034b24 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,8 +5,11 @@ use bevy::{
 };
 use bevy_rapier2d::prelude::*;
 use drops::spawner_plugin;
+use game_over_menu::{game_over_menu_plugin, GameOverMenuSet};
+use game_state::state_and_ui_plugin;
 use main_menu::MainMenuSet;
-use player::LifeChangeEvent;
+use player::{player_plugin, GameOverEvent, LifeChangeEvent};
+use scene::scene_plugin;
 
 const METER: f32 = 48.;
 
@@ -17,6 +20,7 @@ struct GameplaySet;
 enum GameState {
     MainMenu,
     InGame,
+    GameOver,
 }
 
 fn main() {
@@ -32,25 +36,38 @@ fn main() {
         .insert_resource(rapier_config)
         .insert_state(GameState::MainMenu)
         .add_plugins(RapierPhysicsPlugin::<NoUserData>::pixels_per_meter(METER))
-        .add_plugins(RapierDebugRenderPlugin::default())
+        // .add_plugins(RapierDebugRenderPlugin::default())
+        .add_event::<GameOverEvent>()
         .add_plugins((
             main_menu_plugin,
             spawner_plugin,
-            game_state::state_and_ui_plugin,
-            player::player_plugin,
+            state_and_ui_plugin,
+            player_plugin,
+            scene_plugin,
+            game_over_menu_plugin,
         ))
         .add_systems(Startup, setup_cam)
-        .add_systems(OnEnter(GameState::InGame), scene::setup_scene)
+        .add_systems(Update, handle_game_over.in_set(GameplaySet))
         .configure_sets(
             Update,
             (
                 GameplaySet.run_if(in_state(GameState::InGame)),
                 MainMenuSet.run_if(in_state(GameState::MainMenu)),
+                GameOverMenuSet.run_if(in_state(GameState::GameOver)),
             ),
         )
         .run()
 }
 
+fn handle_game_over(
+    mut ev_gameover: EventReader<GameOverEvent>,
+    mut game_state: ResMut<NextState<GameState>>,
+) {
+    for ev in ev_gameover.read() {
+        game_state.set(GameState::GameOver)
+    }
+}
+
 fn setup_cam(mut commands: Commands) {
     commands.spawn(Camera2dBundle {
         transform: Transform::from_xyz(0., 4. * METER, 0.),
@@ -59,6 +76,7 @@ fn setup_cam(mut commands: Commands) {
 }
 
 mod drops;
+mod game_over_menu;
 mod game_state;
 mod main_menu;
 mod player;
diff --git a/src/main_menu.rs b/src/main_menu.rs
index 00ce3f0..6e91f2e 100644
--- a/src/main_menu.rs
+++ b/src/main_menu.rs
@@ -1,5 +1,6 @@
 use bevy::{app::AppExit, prelude::*};
 
+use crate::game_over_menu::GameOverMenuSet;
 use crate::GameState;
 
 #[derive(SystemSet, Debug, Clone, PartialEq, Eq, Hash)]
@@ -10,9 +11,12 @@ pub fn main_menu_plugin(app: &mut App) {
         OnEnter(GameState::MainMenu),
         setup_main_menu_ui.in_set(MainMenuSet),
     )
+    .add_systems(Update, button_action.in_set(MainMenuSet))
     .add_systems(
         Update,
-        (button_color_system, button_action).in_set(MainMenuSet),
+        button_color_system
+            .in_set(MainMenuSet)
+            .in_set(GameOverMenuSet),
     )
     .add_systems(OnExit(GameState::MainMenu), exit_menu.in_set(MainMenuSet));
 }
@@ -97,7 +101,7 @@ fn exit_menu(to_despawn: Query<Entity, With<MainMenu>>, mut commands: Commands)
     }
 }
 
-fn button_color_system(
+pub fn button_color_system(
     mut interaction_query: Query<
         (&Interaction, &mut BackgroundColor),
         (Changed<Interaction>, With<Button>),
diff --git a/src/player.rs b/src/player.rs
index 53c7b83..0483219 100644
--- a/src/player.rs
+++ b/src/player.rs
@@ -20,6 +20,9 @@ pub enum LifeChangeEvent {
     Lost,
 }
 
+#[derive(Event)]
+pub struct GameOverEvent;
+
 const DEFAULT_LIVES: u8 = 5;
 
 pub fn player_plugin(app: &mut App) {
@@ -28,13 +31,17 @@ pub fn player_plugin(app: &mut App) {
             OnEnter(GameState::InGame),
             (add_player, add_lives_ui).in_set(GameplaySet),
         )
+        .add_systems(
+            OnExit(GameState::InGame),
+            cleanup_player.in_set(GameplaySet),
+        )
         .add_systems(
             Update,
             (move_player, player_ground_collision, update_lives).in_set(GameplaySet),
         );
 }
 
-pub fn add_player(
+fn add_player(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<ColorMaterial>>,
@@ -63,17 +70,33 @@ pub fn add_player(
         .insert(KinematicCharacterController { ..default() });
 }
 
+fn cleanup_player(
+    player: Query<Entity, With<Player>>,
+    lives_ui: Query<Entity, With<LivesUi>>,
+    mut commands: Commands,
+) {
+    commands.entity(player.single()).despawn();
+    commands.entity(lives_ui.single()).despawn();
+}
+
 #[derive(Component)]
 struct LivesUi;
 fn add_lives_ui(mut commands: Commands) {
     commands.spawn((
-        TextBundle::from("<3 ".repeat(DEFAULT_LIVES.into())),
+        TextBundle::from_section(
+            "<3 ".repeat(DEFAULT_LIVES.into()),
+            TextStyle {
+                font_size: 56.,
+                ..default()
+            },
+        ),
         LivesUi,
     ));
 }
 
 fn update_lives(
     mut ev_lifechange: EventReader<LifeChangeEvent>,
+    mut ev_gameover: EventWriter<GameOverEvent>,
     mut player: Query<&mut Player>,
     mut ui: Query<&mut Text, With<LivesUi>>,
 ) {
@@ -85,11 +108,16 @@ fn update_lives(
             LifeChangeEvent::Lost => p.lives -= 1,
             LifeChangeEvent::Gained => p.lives += 1,
         }
-        txt.sections[0].value = "<3 ".repeat(p.lives.into())
+
+        if p.lives == 0 {
+            ev_gameover.send(GameOverEvent);
+        } else {
+            txt.sections[0].value = "<3 ".repeat(p.lives.into());
+        }
     }
 }
 
-pub fn player_ground_collision(
+fn player_ground_collision(
     mut player: Query<(Entity, &mut Player)>,
     scene_objs: Query<Entity, With<super::scene::SceneObj>>,
     mut collision_events: EventReader<CollisionEvent>,
@@ -113,7 +141,7 @@ pub fn player_ground_collision(
     }
 }
 
-pub fn move_player(
+fn move_player(
     kb_input: Res<ButtonInput<KeyCode>>,
     mut query: Query<(
         &mut Velocity,
diff --git a/src/scene.rs b/src/scene.rs
index 05bc4e3..6d8277c 100644
--- a/src/scene.rs
+++ b/src/scene.rs
@@ -4,11 +4,17 @@ use bevy::{
 };
 use bevy_rapier2d::prelude::*;
 
-use crate::METER;
+use crate::{GameState, METER};
 
 #[derive(Component)]
 pub struct SceneObj;
-pub fn setup_scene(
+
+pub fn scene_plugin(app: &mut App) {
+    app.add_systems(OnEnter(GameState::InGame), setup_scene)
+        .add_systems(OnExit(GameState::InGame), cleanup_scene);
+}
+
+fn setup_scene(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<ColorMaterial>>,
@@ -42,3 +48,9 @@ pub fn setup_scene(
             ));
     }
 }
+
+fn cleanup_scene(query: Query<Entity, With<SceneObj>>, mut commands: Commands) {
+    for e in &query {
+        commands.entity(e).despawn();
+    }
+}