diff --git a/src/features/config/components.rs b/src/features/config/components.rs
index 1f3ccb8..f1c5076 100644
--- a/src/features/config/components.rs
+++ b/src/features/config/components.rs
@@ -2,6 +2,7 @@ use crate::prelude::*;
 use std::fs::File;
 use std::io::BufReader;
 
+/// Global configuration loaded from file, containing balancing numbers and paths.
 #[derive(Resource, Deserialize, Debug)]
 pub struct GameConfig {
     pub grid_width: u32,
@@ -14,6 +15,7 @@ pub struct GameConfig {
     pub berries_per_focus_minute: u32,
 }
 
+/// Configuration for a specific type of seed.
 #[derive(Deserialize, Debug, Clone)]
 pub struct BerrySeedConfig {
     pub name: String,
@@ -61,10 +63,12 @@ impl Default for GameConfig {
 }
 
 impl GameConfig {
+    /// Reads `config.json` from assets.
     pub fn read_config() -> Option<Self> {
         Self::read_from_path(std::path::Path::new("assets/config.json"))
     }
 
+    /// Reads configuration from a specific path.
     pub fn read_from_path(path: &std::path::Path) -> Option<Self> {
         let file = File::open(path).ok()?;
         let reader = BufReader::new(file);
diff --git a/src/features/core/mod.rs b/src/features/core/mod.rs
index bc0e573..cc979a0 100644
--- a/src/features/core/mod.rs
+++ b/src/features/core/mod.rs
@@ -2,6 +2,7 @@ use crate::prelude::*;
 
 pub mod states;
 
+/// Handles core engine setup like camera and initial state.
 pub struct CorePlugin;
 
 impl Plugin for CorePlugin {
@@ -11,6 +12,7 @@ impl Plugin for CorePlugin {
     }
 }
 
+/// Spawns the main 2D camera.
 fn setup_camera(mut commands: Commands) {
     commands.spawn(Camera2d::default());
 }
diff --git a/src/features/core/states.rs b/src/features/core/states.rs
index e14ed92..8ae853b 100644
--- a/src/features/core/states.rs
+++ b/src/features/core/states.rs
@@ -1,5 +1,6 @@
 use crate::prelude::*;
 
+/// Global states of the application.
 #[derive(States, Clone, PartialEq, Eq, Debug, Hash, Default)]
 pub enum AppState {
     #[default]
diff --git a/src/utils/path.rs b/src/utils/path.rs
index 22d3cfb..c65cf2e 100644
--- a/src/utils/path.rs
+++ b/src/utils/path.rs
@@ -1,6 +1,7 @@
 use directories::ProjectDirs;
 use std::path::PathBuf;
 
+/// Returns the platform-specific data directory for the application.
 pub fn get_internal_path() -> Option<PathBuf> {
     let project_dirs = ProjectDirs::from("de", "demenik", "pomomon-garden");