diff --git a/snake-game/src/debug.rs b/snake-game/src/debug.rs
index 8d72744..880b1b9 100644
--- a/snake-game/src/debug.rs
+++ b/snake-game/src/debug.rs
@@ -1,13 +1,17 @@
+//! модуль с инструментами отладки
+
 use bevy::prelude::*;
 
-/// ДЛЯ ОТЛАДКИ - вывод всех сущностей мира
+use crate::domain::GridBarier;
+
+/// вывод всех сущностей мира
 pub fn print_all_entities(mut commands: Commands, query: Query<Entity>) {
     for entity in query {
         commands.entity(entity).log_components();
     }
 }
 
-/// ДЛЯ ОТЛАДКИ - вывод всех сущностей мира по нажатию Enter
+/// вывод всех сущностей мира по нажатию Enter
 pub fn print_all_entities_by_press_enter(input: Res<ButtonInput<KeyCode>>, mut commands: Commands, query: Query<Entity>) {
     if input.just_pressed(KeyCode::Enter) {
         for entity in query {
@@ -16,7 +20,7 @@ pub fn print_all_entities_by_press_enter(input: Res<ButtonInput<KeyCode>>, mut c
     }
 }
 
-/// ДЛЯ ОТЛАДКИ - регулировка скорости игры
+/// регулировка скорости игры
 pub fn time_speed(input: Res<ButtonInput<KeyCode>>, mut time: ResMut<Time<Virtual>>) {
     if input.just_pressed(KeyCode::Equal) {
         let mut speed = time.relative_speed();
@@ -28,10 +32,10 @@ pub fn time_speed(input: Res<ButtonInput<KeyCode>>, mut time: ResMut<Time<Virtua
         speed *= 0.5;
         time.set_relative_speed(speed);
         trace!("time speed set x0.5");
-    } else if input.just_pressed(KeyCode::Home) {
+    } else if input.just_pressed(KeyCode::Backspace) {
         time.set_relative_speed(1.0);
         trace!("time speed reset");
-    } else if input.just_pressed(KeyCode::Pause) {
+    } else if input.just_pressed(KeyCode::Space) {
         if time.is_paused() {
             time.unpause();
             trace!("unpause game");
@@ -42,7 +46,14 @@ pub fn time_speed(input: Res<ButtonInput<KeyCode>>, mut time: ResMut<Time<Virtua
     }
 }
 
-fn _split_by_grid_tracing(src: f32, dst: f32, grid: f32) -> Vec<(f32, f32)> {
+/// Замедлить время и поставить на паузу
+pub fn set_initial_time_speed_to_slow_and_pause(mut time: ResMut<Time<Virtual>>) {
+    time.set_relative_speed(1.0 / 8.0);
+    time.pause();
+}
+
+/// обертка над функцией [crate::tools::split_by_grid] для ее отладки
+pub fn _split_by_grid_tracing(src: f32, dst: f32, grid: f32) -> Vec<(f32, f32)> {
     let result = crate::tools::split_by_grid(src, dst, grid);
     trace!("\tsplit_by_grid({:?}, {:?}, {:?}) -> {:?}", src, dst, grid, result);
     result
@@ -81,3 +92,11 @@ pub fn spawn_grid(commands: &mut Commands) {
         ));
     }
 }
+
+/// трассировка движения змеи
+pub fn trace_snake_moving(e: On<GridBarier>) {
+    let entity = e.entity;
+    let position = e.position;
+    let direction = e.direction;
+    trace!("...<{entity:?}> is moving on {position} {direction:?}");
+}
diff --git a/snake-game/src/main.rs b/snake-game/src/main.rs
index aa3d6f5..4fdefb5 100644
--- a/snake-game/src/main.rs
+++ b/snake-game/src/main.rs
@@ -17,14 +17,27 @@ fn main() {
                 }),
         )
         .insert_resource(ClearColor(Color::srgb(0.3, 0.6, 0.8)))
-        .add_systems(Startup, (startup,))
-        // .add_systems(PostStartup, snake_game::debug::print_all_entities)
+        .add_systems(
+            Startup,
+            (
+                || {}, //
+                startup,
+                snake_game::debug::set_initial_time_speed_to_slow_and_pause,
+            ),
+        )
+        .add_systems(
+            PostStartup,
+            (
+                || {},
+                // snake_game::debug::print_all_entities,
+            ),
+        )
         .add_systems(Update, (head_rotation,))
         .add_systems(FixedUpdate, (snake_moving,))
         .add_systems(
             PostUpdate,
             (
-                //
+                || {}, //
                 snake_game::debug::print_all_entities_by_press_enter,
                 snake_game::debug::time_speed,
             ),
diff --git a/snake-game/src/startup.rs b/snake-game/src/startup.rs
index 901d0e1..5d7eb4c 100644
--- a/snake-game/src/startup.rs
+++ b/snake-game/src/startup.rs
@@ -1,7 +1,7 @@
 use bevy::prelude::*;
 
 use crate::{
-    domain::{End, GridBarier, SnakePath, Tail},
+    domain::{End, SnakePath, Tail},
     observers::schedule_set_velocity,
 };
 
@@ -19,12 +19,7 @@ fn spawn_snake(commands: &mut Commands) {
 
     commands.insert_resource(SnakePath::default());
 
-    commands.spawn(Observer::new(|e: On<GridBarier>| {
-        let entity = e.entity;
-        let position = e.position;
-        let direction = e.direction;
-        trace!("...<{entity:?}> is moving on {position} {direction:?}");
-    }));
+    commands.spawn(Observer::new(crate::debug::trace_snake_moving));
 
     let head = commands
         .spawn((