feat: Paint GameScreen background green

src/plugins/game_screen.rs

@@ -1,5 +1,6 @@
 use crate::components::*;
 use crate::states::*;
+use bevy::color::palettes::css::GREEN;
 use bevy::prelude::*;
 use bevy_aseprite_ultra::prelude::*;
 
@@ -21,6 +22,10 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
         },
         Sprite::default(),
     ));
+
+    commands.insert_resource(ClearColor(Color::from(GREEN)));
 }
 
-fn cleanup() {}
+fn cleanup(mut commands: Commands) {
+    commands.remove_resource::<ClearColor>();
+}