Some jank but workable

src/bin/flappy/main.rs

@@ -8,8 +8,8 @@ fn main() {
         })
         .init_state::<PlayerState>()
         .add_systems(Startup, (init_bird, init_ui))
-        .add_systems(OnEnter(PlayerState::Dead), kill_bird)
         .add_systems(OnEnter(PlayerState::Alive), alive_bird)
+        .add_systems(OnExit(PlayerState::Alive), kill_bird)
         .add_systems(
             Update,
             (
@@ -136,10 +136,10 @@ fn toggle_rewind(keycode: Res<ButtonInput<KeyCode>>, mut next: ResMut<NextState<
     );
 
     if keycode.pressed(KeyCode::KeyR) {
-        info!("Toggling rewind ON");
+        debug!("Toggling rewind ON");
         next.set(PlayerState::Rewind)
     } else {
-        info!("Toggling rewind OFF");
+        debug!("Toggling rewind OFF");
         next.set(PlayerState::Alive)
     }
 }
@@ -169,8 +169,12 @@ fn rewind(
     );
 
     birds.iter_mut().for_each(|(mut transform, mut tape)| {
-        transform.translation = tape.translations.pop().unwrap();
+        if let Some(t) = tape.translations.pop() {
-        transform.rotation = tape.rotations.pop().unwrap();
+            transform.translation = t;
+        }
+        if let Some(r) = tape.rotations.pop() {
+            transform.rotation = r;
+        }
     });
 }
 
@@ -193,10 +197,10 @@ fn detect_dead(
                 .any(|(_type_id, list)| list.contains(&(*bird)));
 
             if bird_visible {
-                info!("Bird is visible, making alive");
+                debug!("Bird is visible, making alive");
                 next.set(PlayerState::Alive);
             } else {
-                info!("Bird is not visible, making dead");
+                debug!("Bird is not visible, making dead");
                 next.set(PlayerState::Dead);
             }
         }