Update to Bevy 0.12

src/level.rs

@@ -1,7 +1,6 @@
 use bevy::prelude::*;
 
-// #[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Default, States)]
-#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Default)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Default, States)]
 pub enum LevelState {
     #[default]
     Begin,
@@ -10,12 +9,12 @@ pub enum LevelState {
 }
 
 #[derive(Resource)]
-struct Level(u32);
+pub struct Level(pub u32);
 
 pub(super) struct LevelPlugin;
 
 impl Plugin for LevelPlugin {
     fn build(&self, app: &mut App) {
-        // app.add_state::<LevelState>();
+        app.insert_resource(Level(1));
     }
 }