extract to file, primitive player system that is not actually run

src/game.rs

@@ -0,0 +1,9 @@
+use bevy::prelude::*;
+use bevy_rapier2d::prelude::*;
+use player::player_plugin;
+
+mod player;
+
+fn game_plugin(app: &mut App) {
+    app.add_plugins((player_plugin));
+}

src/game/player.rs

@@ -0,0 +1,14 @@
+use bevy::prelude::*;
+use bevy_rapier2d::prelude::*;
+
+use crate::AppState;
+#[derive(Component)]
+struct Player {}
+
+pub(super) fn player_plugin(app: &mut App) {
+    //app.add_systems(OnEnter(AppState::InGame), add_player.in_set(GameplaySet));
+}
+
+pub fn add_player(mut commands: Commands) {
+    commands.spawn(Player {});
+}

src/main.rs

@@ -1,24 +1,7 @@
 use bevy::prelude::*;
 use bevy_rapier2d::prelude::*;
 
-mod game {
-    use bevy::prelude::*;
-    use bevy_rapier2d::prelude::*;
-    use player::player_plugin;
-
-    mod player {
-        use bevy::prelude::*;
-        use bevy_rapier2d::prelude::*;
-        #[derive(Component)]
-        struct Player;
-
-        pub(super) fn player_plugin(app: &mut App) {}
-    }
-
-    fn game_plugin(app: &mut App) {
-        app.add_plugins((player_plugin));
-    }
-}
+mod game;
 
 const METER: f32 = 120.;