Consistent naming

src/systems/mod.rs

@@ -37,14 +37,14 @@ pub fn add_player(
     asset_server: Res<AssetServer>,
     mut materials: ResMut<Assets<ColorMaterial>>,
 ) {
-    let player_sprite = materials.add(asset_server.load("marshmallow.png").into());
+    let player_material = materials.add(asset_server.load("marshmallow.png").into());
 
     commands
         .spawn()
         .insert(Player)
         .insert(Name("Player 1".to_string()))
         .insert_bundle(SpriteBundle {
-            material: player_sprite,
+            material: player_material,
             sprite: Sprite::new(Vec2::new(64.0, 64.0)),
             transform: Transform::from_translation(Vec3::new(0.0, 0.0, 1.0)),
             ..Default::default()